Date   

locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

salvo.semi@...
 

hello, thanks for the quick response, I shoot without a guide, the problem is that not all the photos are elongated but on average half, and when that gear turns you can see that it is twisted and pulls and loosens the belt, this cmq is not good, in my opinion it would solve by putting the gear straight so that the belt always has the same tension. I would also be willing to buy it knowing the measurements and the number of teeth, it does not have an excessive cost.


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

Jerry Hubbell - Explore Scientific VP Engineering
 

Hi Salvo,

Welcome to the forum!  

What focal length are you imaging at? Are you autoguiding? If you are using PHD2, can you post the guide log for us to take a look at?  If you are not autoguiding then the oblong stars are related to the inherent PE of the iEXOS 100 mount system. Depending on the focal length you are imaging, you can get away without auto guiding, but you will always have some sub frames that show elongated stars. If you could post one of your images also, that would be good.

Thanks
--
Jerry Hubbell
Vice President of Engineering

Explore Scientific, LLC.
jrh at explorescientific.com

www.explorescientificusa.com
1010 S. 48th Street
Springdale, AR 72762
1-866-252-3811

Author: Scientific Astrophotography: How Amateurs Can Generate and Use Professional Imaging Data
             Remote Observatories for Amateur Astronomers: Using High-Powered Telescopes From Home


Mark Slade Remote Observatory (MSRO) IAU MPC W54 Equipment
Wilderness, VA
Mounts
: ES PMC-Eight G11 + Telescope Drive Master (TDM)
Scopes: ES 165 FPL-53 ED APO CF, ES 102 FCD100 ED APO CF
Cameras:  QHY174M-GPS + FW, QHY163C
Misc: 3-inch 0.7x Focal Reducer Field Flattener, Filters: Luminance,
Red, V-band Photometric, Diffuser, 200 lpmm Spectral Grating

Software: MaxIm DL 6, Cartes du Ciel, Astrometrica, AstroImageJ, AutoStakkert!


locked #iEXOS-100 crooked pulley gear #iEXOS-100

salvo.semi@...
 

hi all, i have an iexos-100 and i noticed that taking pictures half come with elongated stars and half not, more or less at regular intervals. I tried to figure out what the problem was and I realized that the gear of the pulley of the AR motor is slightly crooked, so there are moments that stretch the belt and it could cause those micro movements that cause the stretched stars, see photo gear, I wanted to ask cove I can find this gear or at least the measures and how many teeth it has so that I can buy and replace it, the frame is still under warranty. P.S. sorry english but i used google translate.


Re: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

Derrell Oliver
 

Thanks Wes !!
--
Derrell Oliver
Astro-Tech AT80ED
Meade Infinity ST80 with Lunt Solar dual speed crayford focuser.
Meade Polaris 90 with GSO dual speed crayford focuser.
Meade Polaris 130 with ScopeStuff 1.25 crayford focuser, flocked tube and center spotted mirror.
ES iEXOS-100
ZWO ASI120mc-s, Canon XSi 450d.
EQ2 Mount with Orion EQ-2M RA Drive.
AZ3 Alt-Azimuth Mount.


Re: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

Wes Mcdonald
 

Nice nice nice.   We does love our m31.  Too bad it’s collide with us!

Wes

On Thu, Oct 1, 2020 at 5:43 PM Derrell Oliver <mtbkr123@...> wrote:

[Edited Message Follows]



Hey Guys,
Here is my shot of M31 taken last night, it was a full moon but it was the first clear night we have had in a long time so I took a chance on it !!
2 hours 17 minutes of exposure time, 30 second exposures @ iso 800, 20 Darks, 20 Bias & 20 Flats, unguided, Astro-Tech AT80ED, Astro-Tech .80 Reducer/ Field Flattener, Canon XSI 450d, ICE Lipo Light pollution filter, Stacked in Deep Sky Stacker & processed in GIMP.
Any suggestions on a better filter for M31 ? 

--
Derrell Oliver
Astro-Tech AT80ED
Meade Infinity ST80 with Lunt Solar dual speed crayford focuser.
Meade Polaris 90 with GSO dual speed crayford focuser.
Meade Polaris 130 with ScopeStuff 1.25 crayford focuser.
ES iEXOS-100 
ZWO ASI120mc-s, Canon XSi 450d.
EQ2 Mount with Orion EQ-2M RA Drive.
AZ3 Alt-Azimuth Mount.










--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired


Re: Does Explore Stars only work on WiFi for a PC running Windows? #ExploreStars

Tyler Bowman - Explore Scientific Customer Service
 

Gorgeous

 

1458310636860_logo.png

 

Tyler Bowman - Customer Service

Office   +1(866) 252-3811 Ext: 516

Fax        +1(479) 717-2898

 

EXPLORE SCIENTIFIC, LLC

1010 South 48th Street

Springdale, AR 72762 USA

 

Brands: Explore Scientific | Bresser | Explore One 
Official Licensee: National Geographic | Discovery

 

Publications:  Sky's Up Magazine

 

Affiliations: UNESCO Space Education Program | AstronomyOutreach network

 

 

From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> On Behalf Of Wade Prunty via groups.io
Sent: Thursday, October 1, 2020 4:54 PM
To: MAIN@ESPMC-Eight.groups.io
Subject: Re: [ESPMC-Eight] Does Explore Stars only work on WiFi for a PC running Windows?

 

The moon has absolutely killed me this week! Hopefully soon I’ll be able to post something from it with the AR102. I did run it one night off the ASIAIR Pro and it worked great! Here’s an image of it setup on my telescope platform.


--
Explore Scientific iEXOS-100
William Optics SpaceCat 51 APO
ZWO ASI183MM Pro, ASI533MC Pro
Canon 5D, T3i (Both Astro Mods)
William Optics UniGuide
ZWO ASI120MM-S
ZWO ASIAIR Pro


--

1458310636860_logo.png

 

Tyler Bowman - Customer Service

Office   +1(866) 252-3811 Ext: 516

Fax        +1(479) 717-2898


Re: Does Explore Stars only work on WiFi for a PC running Windows? #ExploreStars

Wade Prunty
 

The moon has absolutely killed me this week! Hopefully soon I’ll be able to post something from it with the AR102. I did run it one night off the ASIAIR Pro and it worked great! Here’s an image of it setup on my telescope platform.


--
Explore Scientific iEXOS-100
William Optics SpaceCat 51 APO
ZWO ASI183MM Pro, ASI533MC Pro
Canon 5D, T3i (Both Astro Mods)
William Optics UniGuide
ZWO ASI120MM-S
ZWO ASIAIR Pro


Re: Does Explore Stars only work on WiFi for a PC running Windows? #ExploreStars

Tyler Bowman - Explore Scientific Customer Service <Tbowman@...>
 

How is the mount going Wade?


Re: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

Derrell Oliver
 
Edited

Hey Guys,
Here is my shot of M31 taken last night, it was a full moon but it was the first clear night we have had in a long time so I took a chance on it !!
2 hours 17 minutes of exposure time, 30 second exposures @ iso 800, 20 Darks, 20 Bias & 20 Flats, unguided, Astro-Tech AT80ED, Astro-Tech .80 Reducer/ Field Flattener, Canon XSI 450d, ICE Lipo Light pollution filter, Stacked in Deep Sky Stacker & processed in GIMP.
Any suggestions on a better filter for M31 ? 

--
Derrell Oliver
Astro-Tech AT80ED
Meade Infinity ST80 with Lunt Solar dual speed crayford focuser.
Meade Polaris 90 with GSO dual speed crayford focuser.
Meade Polaris 130 with ScopeStuff 1.25 crayford focuser.
ES iEXOS-100 
ZWO ASI120mc-s, Canon XSi 450d.
EQ2 Mount with Orion EQ-2M RA Drive.
AZ3 Alt-Azimuth Mount.


Re: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

Jeff Snell
 

My latest from last night...Lagoon and Trifid Nebula and the Soul Nebula.  

Both shot at 3200 ISO, 120sec exposures, Canon T5i astro-modified 
Lagoon and Trifid: 30 Light, 20 Dark, 20 Flat, 20 Bias
Soul Nebula: 90 Light, 20 Dark, 20 Flat, 20 Bias

Processed with Deep Sky Stacker and Photoshop with Astro Plug Ins

Lagoon and Trifid was shot looking south over Ogden/Salt Lake City Utah at about 30 degrees elevation.  Lots of light pollution and about 95% moon illumination.  The Optolong L-Enhance Filter is AWESOME!  I am totally surprised by the detail that came through on that shot.

PHD tracking total consistently .4 and below...

Jeff

EXOS 2 GT/PMC-Eight w/Explore Stars
ES ED80mm APO
Celestron 8" Edge HD
Canon Ti-5 w/ Spencer Camera Astro-mod
Orion Starshoot AutoGuider w/50mm Guidescope
QHY Polemaster
ASCOM POTH Hub, CdC, APT, PHD2


On Mon, Sep 21, 2020 at 3:25 PM Jeff snell <jeffery.snell1@...> wrote:
That's cool!
  
Jeff

PMC-Eight w/Explore Stars
ES ED80mm APO
Celestron 8" Edge HD
Canon Ti-5 w/ Spencer Camera Astro-mod


On Mon, Sep 21, 2020 at 1:54 PM Jennifer Shelly via groups.io <drunkendogg=yahoo.com@groups.io> wrote:

[Edited Message Follows]

3-D printed lithophane of an image of the Moon that I shot on 04/06/2020 with my ES 127 FCD-100 with 3" FF / 0.7x FR, QHY 600M camera, and ES PMC-8 G-11.  

Moon image.



Completed lithophane print.



Lithophane illuminated from behind.



The lithophane took 20.75 hours to print. I am pleased with the result with my first attempt.  I am currently printing another version that is a little thicker to get more contrast which will take 29.17 hours to print.

--
Sincerely,

Jennifer Shelly
AstroPorch, VA

Mounts
: ES PMC-8 G-11, ES PMC-8 EXOS-2
Scopes: ES ED127 FCD-100, ES Levy Comet Hunter, ES N208CF, QHY Mini Guide Scope, Solomark F60 Guide Scope
Cameras: QHY600M, QHY128C, QHY168C
Misc: MoonLite CFL 2.5 / High Res Stepper / V2 Mini Controller, Baader SteelTrack NT / SteelDrive II, Baader UFC, Optolong 2" L-Pro / L-eNhance, QHY CFW3-L, Baader 2” LRGBSHO CCD
Imaging Software:  NINA, APT, SharpCap Pro
Processing Software: PixInsight, Lightroom, Premiere Elements


PMC-Eight Stellarium Setup Procedure #ASCOM

Tyler Bowman - Explore Scientific Customer Service <Tbowman@...>
 
Edited

Myself, Jerry Hubbell, and David Campbell have come up with a step by step procedure for you to use the PMC-EIGHT and Stellarium with ASCOM. 

I hope everyone enjoys and have clear skies and keep looking up.



PMC-Eight and Stellarium hook up.

 

1.       Download ASCOM 6.5 making sure to install POTH.

2.       Run the ASCOM Diagnostics program to verify all the components of the platform were installed correctly.

3.       Download and Install Stellarium 20.3.

4.       Under the ASCOM folder in the Start Menu, find and start POTH Scope-Dome Hub.

5.        Select Setup and Select Choose Scope. Select “ES PMC8 Telescope”

6.       Select Properties and Enter the settings needed for you mount, location, and connection type.

7.       Power up your PMC-Eight Control System and hit the Connect button on POTH to verify that POTH communicates correctly with the mount.

8.       Start up Stellarium.

9.       Select “MOVE A TELESCOPE TO A GIVEN SET OF COORDINATES”.

10.   The Slew Telescope menu will pop up.

11.   Select CONFIGURE TELESCOPE.

12.   Select ASCOM and scroll down to ASCOM settings.

13.   Choose ASCOM Telescope and Select POTH Hub in the menu

14.   Make sure you UNPARK the mount and turn on Tracking using POTH.


Re: iEXOS-100 First Light #iEXOS-100

Perry Gee <pgee2013@...>
 

Unfortunately, when I called them, they don't have any left.  So I guess I will either have to go with the Skywatcher HEQ5, or wait for 2 or 3 months!


On Tue, Sep 29, 2020 at 8:27 AM Perry Gee via groups.io <pgee2013=gmail.com@groups.io> wrote:
Thanks.  Not a great price, but not terrible either.

I'm still trying to find out what it would cost to ship it to California.

On Tue, Sep 29, 2020 at 8:10 AM Mario <mario1546@...> wrote:
Last time I checked this local supplier in Ontario had some in stock

Might be worth a look given the exchange rate...

Regards,

Mario

On Tue, Sep 29, 2020 at 11:07 AM Perry Gee <pgee2013@...> wrote:
Thanks for letting me know.  They aren't in stock in the US until November sometime, so I've been looking all over.

Unfortunately, the cost of import and shipping is prohibitive.  But it was worth looking at the possibility.

On Mon, Sep 28, 2020 at 10:34 PM Ian Morison <ian@...> wrote:
Hi Perry,
   The UK dealers are also out of stock,  but I found  one on Amazon UK.  The price was higher ($50) than UK cost but free delivery.   I discovered that it came from Germany taking some time.  The  website implies that it will be back in stock mid October.   

Cheers,

Ian

On Tuesday, September 29, 2020, Perry Gee <pgee2013@...> wrote:
I've been struggling to buy a mount this last month, as all of the American dealers seem to be back-ordered.

Where did you buy from?

On Mon, Sep 28, 2020 at 4:44 AM Ian Morison <ian@...> wrote:
Hi all,
  I acquired my mount last week largely for use as an astrophotography tracking mount for use with long lenses or small telescopes.  There have been two clear periods, one 9 pm (Deneb) and one at 04:30 am for Orion region.
   Having three equatorial mounts already, including a Losmandy GM8 and Astro Physics Mach 1, why did I buy it?  

Small and light for one thing, a belt drive for another but the greatest reason was the fact that it has adjustable clutches in RA and Dec as does my GM8.  For wide field imaging one does not need 'goto' so I have simply activated the mounts motors - so it will then continue tracking at siderial rate and adjust the clutch tensions so that I can manually move the scope to the region of sky that I want to image and the telescope/lens will keep pointing when I cease the pointing adjustment.  The full frame Sony Cameras that I am using allows one to 'see' the starfield in live view to align the telescope and camera on the region of interest which the mount then follows.  Simples.  (Now in UK dictionary.)
I polar aligned using a laser beam through the RA sighting tube.

Three images:
1) First light of the mount of the Deneb region using a Teleskop Service 65mm, 420mm focal length, Quad astrograph.  Sony A7 II with stacked 30 second exposures.

2) I have tried to 'observe' the tracking performance by 'tracking' a fixed artificial star and find it very difficult to spot the tracking errors.  I have edge detected the track and the variation seems to be only 2- 3 pixels.

3) The Sword of Orion.  Takahashi FS 60 and Sony A7S.  Composite of three 'panes' aligned and stacked in Sequator.    Nothing special, but the Orion, Running Man and Flame Nebulae are there.  Full image is ~30 megapixel. This is 25%.

So I am very pleased with my purchase!  (From Germany as UK dealers are out of stock.)

Thanks again to Wes and Jerry for their help in getting me going. 

Regards.

Ian Morison


--
Regards,

Mario
Streetsville, Ontario

Mounts: iExos 100, Skyguider Pro
Scopes/Lenses: Main/Orion 80mm, DSLR/Tamron 18-400mm lens, guide/ZWO-340A
Computer: ASIAir
Cameras: Canon T2i DSLR, ZWO120MM (guide)
Utility Software: iPolar (for Skyguider polar alignment), iCap, Explorestars, Canon EOS Utility
Image Processing Software: Photoshop


Re: iEXOS-100 First Light #iEXOS-100

Perry Gee <pgee2013@...>
 

Thanks.  Not a great price, but not terrible either.

I'm still trying to find out what it would cost to ship it to California.

On Tue, Sep 29, 2020 at 8:10 AM Mario <mario1546@...> wrote:
Last time I checked this local supplier in Ontario had some in stock

Might be worth a look given the exchange rate...

Regards,

Mario

On Tue, Sep 29, 2020 at 11:07 AM Perry Gee <pgee2013@...> wrote:
Thanks for letting me know.  They aren't in stock in the US until November sometime, so I've been looking all over.

Unfortunately, the cost of import and shipping is prohibitive.  But it was worth looking at the possibility.

On Mon, Sep 28, 2020 at 10:34 PM Ian Morison <ian@...> wrote:
Hi Perry,
   The UK dealers are also out of stock,  but I found  one on Amazon UK.  The price was higher ($50) than UK cost but free delivery.   I discovered that it came from Germany taking some time.  The  website implies that it will be back in stock mid October.   

Cheers,

Ian

On Tuesday, September 29, 2020, Perry Gee <pgee2013@...> wrote:
I've been struggling to buy a mount this last month, as all of the American dealers seem to be back-ordered.

Where did you buy from?

On Mon, Sep 28, 2020 at 4:44 AM Ian Morison <ian@...> wrote:
Hi all,
  I acquired my mount last week largely for use as an astrophotography tracking mount for use with long lenses or small telescopes.  There have been two clear periods, one 9 pm (Deneb) and one at 04:30 am for Orion region.
   Having three equatorial mounts already, including a Losmandy GM8 and Astro Physics Mach 1, why did I buy it?  

Small and light for one thing, a belt drive for another but the greatest reason was the fact that it has adjustable clutches in RA and Dec as does my GM8.  For wide field imaging one does not need 'goto' so I have simply activated the mounts motors - so it will then continue tracking at siderial rate and adjust the clutch tensions so that I can manually move the scope to the region of sky that I want to image and the telescope/lens will keep pointing when I cease the pointing adjustment.  The full frame Sony Cameras that I am using allows one to 'see' the starfield in live view to align the telescope and camera on the region of interest which the mount then follows.  Simples.  (Now in UK dictionary.)
I polar aligned using a laser beam through the RA sighting tube.

Three images:
1) First light of the mount of the Deneb region using a Teleskop Service 65mm, 420mm focal length, Quad astrograph.  Sony A7 II with stacked 30 second exposures.

2) I have tried to 'observe' the tracking performance by 'tracking' a fixed artificial star and find it very difficult to spot the tracking errors.  I have edge detected the track and the variation seems to be only 2- 3 pixels.

3) The Sword of Orion.  Takahashi FS 60 and Sony A7S.  Composite of three 'panes' aligned and stacked in Sequator.    Nothing special, but the Orion, Running Man and Flame Nebulae are there.  Full image is ~30 megapixel. This is 25%.

So I am very pleased with my purchase!  (From Germany as UK dealers are out of stock.)

Thanks again to Wes and Jerry for their help in getting me going. 

Regards.

Ian Morison


--
Regards,

Mario
Streetsville, Ontario

Mounts: iExos 100, Skyguider Pro
Scopes/Lenses: Main/Orion 80mm, DSLR/Tamron 18-400mm lens, guide/ZWO-340A
Computer: ASIAir
Cameras: Canon T2i DSLR, ZWO120MM (guide)
Utility Software: iPolar (for Skyguider polar alignment), iCap, Explorestars, Canon EOS Utility
Image Processing Software: Photoshop


Re: iEXOS-100 First Light #iEXOS-100

Mario
 

Last time I checked this local supplier in Ontario had some in stock

Might be worth a look given the exchange rate...

Regards,

Mario

On Tue, Sep 29, 2020 at 11:07 AM Perry Gee <pgee2013@...> wrote:
Thanks for letting me know.  They aren't in stock in the US until November sometime, so I've been looking all over.

Unfortunately, the cost of import and shipping is prohibitive.  But it was worth looking at the possibility.

On Mon, Sep 28, 2020 at 10:34 PM Ian Morison <ian@...> wrote:
Hi Perry,
   The UK dealers are also out of stock,  but I found  one on Amazon UK.  The price was higher ($50) than UK cost but free delivery.   I discovered that it came from Germany taking some time.  The  website implies that it will be back in stock mid October.   

Cheers,

Ian

On Tuesday, September 29, 2020, Perry Gee <pgee2013@...> wrote:
I've been struggling to buy a mount this last month, as all of the American dealers seem to be back-ordered.

Where did you buy from?

On Mon, Sep 28, 2020 at 4:44 AM Ian Morison <ian@...> wrote:
Hi all,
  I acquired my mount last week largely for use as an astrophotography tracking mount for use with long lenses or small telescopes.  There have been two clear periods, one 9 pm (Deneb) and one at 04:30 am for Orion region.
   Having three equatorial mounts already, including a Losmandy GM8 and Astro Physics Mach 1, why did I buy it?  

Small and light for one thing, a belt drive for another but the greatest reason was the fact that it has adjustable clutches in RA and Dec as does my GM8.  For wide field imaging one does not need 'goto' so I have simply activated the mounts motors - so it will then continue tracking at siderial rate and adjust the clutch tensions so that I can manually move the scope to the region of sky that I want to image and the telescope/lens will keep pointing when I cease the pointing adjustment.  The full frame Sony Cameras that I am using allows one to 'see' the starfield in live view to align the telescope and camera on the region of interest which the mount then follows.  Simples.  (Now in UK dictionary.)
I polar aligned using a laser beam through the RA sighting tube.

Three images:
1) First light of the mount of the Deneb region using a Teleskop Service 65mm, 420mm focal length, Quad astrograph.  Sony A7 II with stacked 30 second exposures.

2) I have tried to 'observe' the tracking performance by 'tracking' a fixed artificial star and find it very difficult to spot the tracking errors.  I have edge detected the track and the variation seems to be only 2- 3 pixels.

3) The Sword of Orion.  Takahashi FS 60 and Sony A7S.  Composite of three 'panes' aligned and stacked in Sequator.    Nothing special, but the Orion, Running Man and Flame Nebulae are there.  Full image is ~30 megapixel. This is 25%.

So I am very pleased with my purchase!  (From Germany as UK dealers are out of stock.)

Thanks again to Wes and Jerry for their help in getting me going. 

Regards.

Ian Morison


--
Regards,

Mario
Streetsville, Ontario

Mounts: iExos 100, Skyguider Pro
Scopes/Lenses: Main/Orion 80mm, DSLR/Tamron 18-400mm lens, guide/ZWO-340A
Computer: ASIAir
Cameras: Canon T2i DSLR, ZWO120MM (guide)
Utility Software: iPolar (for Skyguider polar alignment), iCap, Explorestars, Canon EOS Utility
Image Processing Software: Photoshop


Re: iEXOS-100 First Light #iEXOS-100

Perry Gee <pgee2013@...>
 

Thanks for letting me know.  They aren't in stock in the US until November sometime, so I've been looking all over.

Unfortunately, the cost of import and shipping is prohibitive.  But it was worth looking at the possibility.

On Mon, Sep 28, 2020 at 10:34 PM Ian Morison <ian@...> wrote:
Hi Perry,
   The UK dealers are also out of stock,  but I found  one on Amazon UK.  The price was higher ($50) than UK cost but free delivery.   I discovered that it came from Germany taking some time.  The  website implies that it will be back in stock mid October.   

Cheers,

Ian

On Tuesday, September 29, 2020, Perry Gee <pgee2013@...> wrote:
I've been struggling to buy a mount this last month, as all of the American dealers seem to be back-ordered.

Where did you buy from?

On Mon, Sep 28, 2020 at 4:44 AM Ian Morison <ian@...> wrote:
Hi all,
  I acquired my mount last week largely for use as an astrophotography tracking mount for use with long lenses or small telescopes.  There have been two clear periods, one 9 pm (Deneb) and one at 04:30 am for Orion region.
   Having three equatorial mounts already, including a Losmandy GM8 and Astro Physics Mach 1, why did I buy it?  

Small and light for one thing, a belt drive for another but the greatest reason was the fact that it has adjustable clutches in RA and Dec as does my GM8.  For wide field imaging one does not need 'goto' so I have simply activated the mounts motors - so it will then continue tracking at siderial rate and adjust the clutch tensions so that I can manually move the scope to the region of sky that I want to image and the telescope/lens will keep pointing when I cease the pointing adjustment.  The full frame Sony Cameras that I am using allows one to 'see' the starfield in live view to align the telescope and camera on the region of interest which the mount then follows.  Simples.  (Now in UK dictionary.)
I polar aligned using a laser beam through the RA sighting tube.

Three images:
1) First light of the mount of the Deneb region using a Teleskop Service 65mm, 420mm focal length, Quad astrograph.  Sony A7 II with stacked 30 second exposures.

2) I have tried to 'observe' the tracking performance by 'tracking' a fixed artificial star and find it very difficult to spot the tracking errors.  I have edge detected the track and the variation seems to be only 2- 3 pixels.

3) The Sword of Orion.  Takahashi FS 60 and Sony A7S.  Composite of three 'panes' aligned and stacked in Sequator.    Nothing special, but the Orion, Running Man and Flame Nebulae are there.  Full image is ~30 megapixel. This is 25%.

So I am very pleased with my purchase!  (From Germany as UK dealers are out of stock.)

Thanks again to Wes and Jerry for their help in getting me going. 

Regards.

Ian Morison


Re: Cloudy Nights Thread #CloudyNights

Jennifer Shelly
 

Done 
--
Sincerely,

Jennifer Shelly
AstroPorch, VA

Mounts
: ES PMC-8 G-11, ES PMC-8 EXOS-2
Scopes: ES ED127 FCD-100, ES Levy Comet Hunter, ES N208CF, QHY Mini Guide Scope, Solomark F60 Guide Scope
Cameras: QHY600M, QHY128C, QHY168C
Misc: MoonLite CFL 2.5 / High Res Stepper / V2 Mini Controller, Baader SteelTrack NT / SteelDrive II, Baader UFC, Optolong 2" L-Pro / L-eNhance, QHY CFW3-L, Baader 2” LRGBSHO CCD
Imaging Software:  NINA, APT, SharpCap Pro
Processing Software: PixInsight, Lightroom, Premiere Elements


Re: iEXOS-100 First Light #iEXOS-100

Wes Mcdonald
 

Ian

Nice technique.  Very cool.  

When I said “break the clutches” I meant release them 😀.   No problem to push to!  

You might be interested to know the iexos clutch uses a friction lock system to engage the wheel gear to the shaft.  This is a good way, as it does not distort the wheel gear the way a wedge lock clutch might.  

Thanks for the characterization and method.  That a7S seems like a nice camera.  The large pixels would make it great at 1600mm fl, match up with seeing very nicely.  That would make it a candidate for an f10 scope at 2500mm fl with a .68 reducer -  perfect for a 10” SCT

I image with a Nikon D5300 Astro modified.  The darn thing is danged quiet and takes some pretty pics matched to my ES 127 refractor @ 940mm fl.   With a .8 reducer it will capture the Orion Nebula and Running man in one frame.  

Thanks again for doing these tests.  Look forward to your blog on the mount.   

Wes

--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired


Re: iEXOS-100 First Light #iEXOS-100

Ian Morison
 

Hi Wes,
  I have investigated the tracking further.  I always allow the NCP alignment to be slightly off so the image moves across the sensor during the total period of the exposures. This helps remove the effects of hot pixels and 'color mottling'.  Each exposure is short enough so the stars were not trailed.  In the Orion image, the exposure time was just 15 seconds so that the centre of M32 would not be overexposed.  That worked.  If there are hot pixels these will leave a trail across the image which will show the tracking performance.  It was quite cold and the Sony A7S with its 8.4 micrometre sized pixels was virtually free of hot pixels and I could only find one faint trail.  This is cleaned up and rotated in the attached image.  One can see the periodic error track.  Each pixel of the camera/scope combination subtends 5 arc seconds, so the PE error is somewhere between 10 and 15 pixels - just as you thought. 
Cheers,

Ian

 

On Tue, Sep 29, 2020 at 9:24 AM Ian Morison via groups.io <ian=morison.net@groups.io> wrote:
Hi Wes,
            I would not say professional as I was a radio astronomer.  Here are replies to your queries.

1.  To get the mount tracking are you using explorestars?  If so be sure to put the mount in T mode which moves at sidereal rate in RA.  I presume your were.  P mode moves the mount stepwise with 200ms intervals.  Fine for visual, not so for photos.
           Yes I am using Explore Stars in the T -mode.
 
2.  The goto function would obviate your need to break the clutches.  Might be fun for you to use it
         I have used 'goto'  fo some visual observing and, of course, for the astrophotography use I could 'goto' an object nearby and drive to where I want to image.  However,  I do not think manual use would break the clutches!   My GM8 with similar clutches is a 'push to' mount having encoders under the control of an Argo Navis hand controller.

3.  How did you have it track a non moving target?  I would love to see how you configure your artificial star.
        I located the artificial star at the end of the garden (not really far enough away) and placed its image in the camera live view when attached to my 430mm refractor.  Took a very  long 'bulb' exposure whilst the mount was  tracking at siderial rate.  This produces a long streak across the resulting image.  With my small tracking mounts I have always been able to see tracking errors, but could not really see them with this length of exposure..  I suspect though that the exposure was not really long enough.  Thanks for giving me the PE period.   I will do the same experiment tonight using a shorter focal length lens so the exposure can be much longer and will update you.

Cheers,

Ian



Re: iEXOS-100 First Light #iEXOS-100

Ian Morison
 

Hi Wes,
            I would not say professional as I was a radio astronomer.  Here are replies to your queries.

1.  To get the mount tracking are you using explorestars?  If so be sure to put the mount in T mode which moves at sidereal rate in RA.  I presume your were.  P mode moves the mount stepwise with 200ms intervals.  Fine for visual, not so for photos.
           Yes I am using Explore Stars in the T -mode.
 
2.  The goto function would obviate your need to break the clutches.  Might be fun for you to use it
         I have used 'goto'  fo some visual observing and, of course, for the astrophotography use I could 'goto' an object nearby and drive to where I want to image.  However,  I do not think manual use would break the clutches!   My GM8 with similar clutches is a 'push to' mount having encoders under the control of an Argo Navis hand controller.

3.  How did you have it track a non moving target?  I would love to see how you configure your artificial star.
        I located the artificial star at the end of the garden (not really far enough away) and placed its image in the camera live view when attached to my 430mm refractor.  Took a very  long 'bulb' exposure whilst the mount was  tracking at siderial rate.  This produces a long streak across the resulting image.  With my small tracking mounts I have always been able to see tracking errors, but could not really see them with this length of exposure..  I suspect though that the exposure was not really long enough.  Thanks for giving me the PE period.   I will do the same experiment tonight using a shorter focal length lens so the exposure can be much longer and will update you.

Cheers,

Ian


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Re: Ghetto azimuth adjuster #iEXOS-100

Lutz Paelke
 

I printed it with PETG on an Anet A8.

Lutz

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