Date   

OpenGOTO Community Live! 500 Forum Members Giveaway!! #ExploreScientific

Jerry Hubbell - Explore Scientific VP Engineering
 

Please tune in to our OpenGOTO Community Live! program this week for a chance to win an Explore Scientific 100-deg Apparent FOV Eyepiece

We are on track to reach 500 members strong on the MAIN forum this week and when we do,
we will be giving your choice of 2 eyepieces: the 14 mm, or the 20 mm


14mm
https://explorescientificusa.com/collections/100-series-eyepiece/products/100-14mm

20mm
https://explorescientificusa.com/products/100-20mm

You can watch us live on Facebook, YouTube, and Twitter!

We look forward to talking with you this week!

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!


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

Dave Cherry
 

That's a good result for a 4-5 , I am in a similar sky,  more 5 than 4 thou . I have a cls filter and the same 72ed as you but with an ASI  but don't like the results much,  since most of the street lighting here is led based now not sodium.
Nebula no problem cos I use a Altair duo band filter. If i use it on galaxies,its ok-ish but so much of the wideband light from such targets gets lost.

Re the mount , I have one of the newer PMC mounts and I can def recommend it. Its been great for me even on my 8 inch with guide cam/scope , laser, red dot etc.
I get below 0.5 Avr on PHD quite often if the winds not too strong :)

Dave.







--
Scopes: Sky Watcher 200PDS, Skywatcher 72ED
Mount: Explore Scientific PMC8 EXO2
Cameras: ASI 294MCPRO Coooled, Altair guide cam + 50mm scope
Software: Sharpcap Pro ,PH2, Stelarium Startools


Re: iexos-100 slewing is sticky #iEXOS-100

Joe Izen
 

I ran into the same issue. Balance is a critical issue for the iExos100 that requires a LOT more attention than for my C14 and 127mm refractors on much larger Orion mounts. The problem is that a DSLR+ Flattener or a diagonal plus 2" eyepiece and possibly a barlow is a significant fraction of the weight of the whole telescope.  Changing from visual to photographic mode, or even changing from a high power to low power eyepiece or adding a Barlow upsets the balance. I can do these changes with impunity with a C14 and there is enough extra horsepower in the drive mechanism that I can get by.  I did not appreciate that for a small scope, balance changes are more significant and motors are much weaker.

I ran into the problem when I did a 2star alignment with an eyepiece, and then switched to a camera. I think the only solution for the iExos100 is to do the 2star alignment using the finder scope with the exact photographic optical train in place and the camera pre-focused.  I bought my iExos100 + 80mm F/6 refractor to have a portable rig for solar eclipses.  I worry that the metal cell of my solar filter will be enough weight to upset the balance.  The only solution I can think is to add a Velcro weight on my telescope tube when using the solar filter.


locked Re: ISO and Exposure Time #Off-Topic #astrophotography

Michael Anderson
 

Thanks Bob


On Mon, Jul 27, 2020 at 8:15 AM Robert Hoskin <devonshire@...> wrote:
Michael,
 
Tons of discussions on camera ISO's, etc. over on CloudyNights, and some astrobin posters also list their ISO.  Probably best to figure out the ISO that best suits your camera, and then sort out the exposure with trial-and-error.  
 
CN is where I learned the best astro-ISO for my D5300, and that for my specific camera, there was no point in taking darks.  Lots of back-and-forth to sort through.  Search is your friend...
 
- Bob
 
--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


--
Michael Anderson: Earthling
Handle: MrThump30
Home World:
Planet Earth

Scope:
ES Comet Hunter Mak-Newt 152mm F4.8
Mount: Celestron AVX w/ All Star Polar Align & Polar Scope
Camera/Eyepiece: Canon M50 DLSR, Orion StarShoot Pro Mono / Hyperion MK4 8-24 Zoom
Finder Scope/Autoguider: ES 8x50 RA Finder Scope / Orion 50mm Guide Scope 
Hardware/Software: Computer: HP 15" Laptop, Windows 10 / Programs: ASCOM 6.4, PHD V2
Cooler: Rubbermaid 48Qt
Beer: Cold
Coffee: Black
Music: Jethro Tull


locked Re: ISO and Exposure Time #Off-Topic #astrophotography

 

Michael,
 
Tons of discussions on camera ISO's, etc. over on CloudyNights, and some astrobin posters also list their ISO.  Probably best to figure out the ISO that best suits your camera, and then sort out the exposure with trial-and-error.  
 
CN is where I learned the best astro-ISO for my D5300, and that for my specific camera, there was no point in taking darks.  Lots of back-and-forth to sort through.  Search is your friend...
 
- Bob
 
--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


Re: iexos-100 slewing is sticky #iEXOS-100

Yorksman
 

Wes,

Thanks, that is really very helpful and looks straightforward enough. I'm usuaally reluctant because sometimes thingslike springs pop out and I don't know in what order to put things back. But this is OK.

yorksman

On 27/07/2020 13:21, Wes Mcdonald wrote:
Yorksman

There is video from ES that shows how to adjust the mesh for the iexos.  


This will show you how.  Also in the files section of the mounts subgroup you will find a tuning document by Robert Hoskins for the exos2.  While it is for that mount it will give you a sense for what you are trying to achieve.

Generally ES is fine with you adjusting your mesh without wacking your warranty.

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



locked Re: ISO and Exposure Time #Off-Topic #astrophotography

Michael Anderson
 

I did take 9 pictures 400 ISO @5 minutes each on M101, but it did not seem to pick up much detail in the galaxy when stacked. Maybe it is me just processing wrong. I will try 800 ISO when the skies clear next, thanks. 


On Mon, Jul 27, 2020 at 7:51 AM Dan Kahraman <dkahra213@...> wrote:
Michael:

Try both ISO 400 & 800. The chart for the 50D isn't clear. Your exposures will be longer with the filters than without...but don't change the ISO

Dan Kahraman 

On Mon, 27 Jul 2020 at 08:14, Michael Anderson <mikey.ma1982@...> wrote:
Need advise on recommended ISO setting and exposure time for deep sky using a Canon M50 DSLR w/ astronomik light pollution filter in a class 8 city sky. 
--
Michael Anderson: Earthling
Handle: MrThump30
Home World:
Planet Earth

Scope:
ES Comet Hunter Mak-Newt 152mm F4.8
Mount: Celestron AVX w/ All Star Polar Align & Polar Scope
Camera/Eyepiece: Canon M50 DLSR, Orion StarShoot Pro Mono / Hyperion MK4 8-24 Zoom
Finder Scope/Autoguider: ES 8x50 RA Finder Scope / Orion 50mm Guide Scope 
Hardware/Software: Computer: HP 15" Laptop, Windows 10 / Programs: ASCOM 6.4, PHD V2
Cooler: Rubbermaid 48Qt
Beer: Cold
Coffee: Black
Music: Jethro Tull


--
Michael Anderson: Earthling
Handle: MrThump30
Home World:
Planet Earth

Scope:
ES Comet Hunter Mak-Newt 152mm F4.8
Mount: Celestron AVX w/ All Star Polar Align & Polar Scope
Camera/Eyepiece: Canon M50 DLSR, Orion StarShoot Pro Mono / Hyperion MK4 8-24 Zoom
Finder Scope/Autoguider: ES 8x50 RA Finder Scope / Orion 50mm Guide Scope 
Hardware/Software: Computer: HP 15" Laptop, Windows 10 / Programs: ASCOM 6.4, PHD V2
Cooler: Rubbermaid 48Qt
Beer: Cold
Coffee: Black
Music: Jethro Tull


locked Re: ISO and Exposure Time #Off-Topic #astrophotography

Dan Kahraman <dkahra213@...>
 

Michael:

Try both ISO 400 & 800. The chart for the 50D isn't clear. Your exposures will be longer with the filters than without...but don't change the ISO

Dan Kahraman 


On Mon, 27 Jul 2020 at 08:14, Michael Anderson <mikey.ma1982@...> wrote:
Need advise on recommended ISO setting and exposure time for deep sky using a Canon M50 DSLR w/ astronomik light pollution filter in a class 8 city sky. 
--
Michael Anderson: Earthling
Handle: MrThump30
Home World:
Planet Earth

Scope:
ES Comet Hunter Mak-Newt 152mm F4.8
Mount: Celestron AVX w/ All Star Polar Align & Polar Scope
Camera/Eyepiece: Canon M50 DLSR, Orion StarShoot Pro Mono / Hyperion MK4 8-24 Zoom
Finder Scope/Autoguider: ES 8x50 RA Finder Scope / Orion 50mm Guide Scope 
Hardware/Software: Computer: HP 15" Laptop, Windows 10 / Programs: ASCOM 6.4, PHD V2
Cooler: Rubbermaid 48Qt
Beer: Cold
Coffee: Black
Music: Jethro Tull


Re: iexos-100 slewing is sticky #iEXOS-100

Wes Mcdonald
 

Yorksman

There is video from ES that shows how to adjust the mesh for the iexos.  


This will show you how.  Also in the files section of the mounts subgroup you will find a tuning document by Robert Hoskins for the exos2.  While it is for that mount it will give you a sense for what you are trying to achieve.

Generally ES is fine with you adjusting your mesh without wacking your warranty.

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


locked ISO and Exposure Time #Off-Topic #astrophotography

Michael Anderson
 

Need advise on recommended ISO setting and exposure time for deep sky using a Canon M50 DSLR w/ astronomik light pollution filter in a class 8 city sky. 
--
Michael Anderson: Earthling
Handle: MrThump30
Home World:
Planet Earth

Scope:
ES Comet Hunter Mak-Newt 152mm F4.8
Mount: Celestron AVX w/ All Star Polar Align & Polar Scope
Camera/Eyepiece: Canon M50 DLSR, Orion StarShoot Pro Mono / Hyperion MK4 8-24 Zoom
Finder Scope/Autoguider: ES 8x50 RA Finder Scope / Orion 50mm Guide Scope 
Hardware/Software: Computer: HP 15" Laptop, Windows 10 / Programs: ASCOM 6.4, PHD V2
Cooler: Rubbermaid 48Qt
Beer: Cold
Coffee: Black
Music: Jethro Tull


Re: iexos-100 slewing is sticky #iEXOS-100

Yorksman
 

Thanks. I didn't realise balance was so critically sensitive but already a big improvement. Just a slight amount of binding now but it is very much improved. I'm reluctant to open the motor housing up given that it is a brand new mount. Not too sure what to do with a worm/wheel mesh anyway.


On 27/07/2020 01:54, Wes Mcdonald wrote:
You are binding.  Make sure the balance is good.   Might need to adjust your worm/wheel mesh 

Wes

On Sun, Jul 26, 2020 at 6:51 PM Yorksman <harry@...> wrote:
I find that short distance slews with the scope pointing high in the sky
nice and smooth but if asked to slew say from M31 in the northern sky to
Jupiter in the southern sky, as the mount approaches its target nearer
to the horizon, it sticks, makes a noise and then continue. It does this
two or three times and then when it finally comes to rest, it is way off
target. Going back to the Park position, it is also away from its
original position. Have tried altering the clutches, though I don't
tighten them much. It's a brand new mount, only two or three weeks old
and hardly used. Any suggestions as to what might be causing this?





--
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 slewing is sticky #iEXOS-100

Wes Mcdonald
 

You are binding.  Make sure the balance is good.   Might need to adjust your worm/wheel mesh 

Wes

On Sun, Jul 26, 2020 at 6:51 PM Yorksman <harry@...> wrote:
I find that short distance slews with the scope pointing high in the sky
nice and smooth but if asked to slew say from M31 in the northern sky to
Jupiter in the southern sky, as the mount approaches its target nearer
to the horizon, it sticks, makes a noise and then continue. It does this
two or three times and then when it finally comes to rest, it is way off
target. Going back to the Park position, it is also away from its
original position. Have tried altering the clutches, though I don't
tighten them much. It's a brand new mount, only two or three weeks old
and hardly used. Any suggestions as to what might be causing this?





--
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


iexos-100 slewing is sticky #iEXOS-100

Yorksman
 

I find that short distance slews with the scope pointing high in the sky nice and smooth but if asked to slew say from M31 in the northern sky to Jupiter in the southern sky, as the mount approaches its target nearer to the horizon, it sticks, makes a noise and then continue. It does this two or three times and then when it finally comes to rest, it is way off target. Going back to the Park position, it is also away from its original position. Have tried altering the clutches, though I don't tighten them much. It's a brand new mount, only two or three weeks old and hardly used. Any suggestions as to what might be causing this?


Re: RA Axis Issues #EXOS2

 

Ok.
 
I think it's unusual for a mount to just suddenly decide to start sticking.  I had a sticking problem, but it was right from the start - a ring gear ID tolerance problem that I was able to fix(!).  
 
But for this to come out of the blue is just odd. 

Do take a close look at Mike's cable suggestion.  Also remember that the DEC motor is offside and makes balancing fun.  Also, there's a chrome thumbscrew above the RA setting circles - check that it has not become tightened to the point where it drags on the mount's central axis.  And if that doesn't get you past it, I'd suggest you give Kent (ES Curtomer service) a call.
 
HTH...
 
- Bob
 
--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


Re: RA Axis Issues #EXOS2

Mike Leemhuis
 

Justin, have you checked your cable routing?  They can tend to pull on one side and not the other depending on how you have tied everything down.  I've had that happen to me when I was first getting set up.  I ended up routing my cables from the dovetail bar and then to the weight rod near the RA pivot and then to a clamp on the north leg with plenty of slack.  The goal is to minimize cable drag.  Of course it could be something else too........

Mike
 

On Sun, Jul 26, 2020 at 3:10 PM Justin Bailo <bailo.justin@...> wrote:
Yes this is correct. It has never happened in the past, I don't know why the scope is leaning left no matter where I put it. I can change the center of mass on the scope to the right side of it, and it will fly like it's being pulled back to that 11:00 position. The mount itself is also pretty new, within 4 months.

On Sun, Jul 26, 2020 at 1:55 PM Robert Hoskin <devonshire@...> wrote:
Justin,
 
Just playing this back for clarity, I think that you are saying that when you are trying to balance your mount, it does not swing freely through a full arc, with the clutch off, but instead sticks at a couple of points.  I think you are also saying that this is a new development and you had not noticed it until recently.  
 
Is this correct?

- Bob
 
--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


--
Mount: Explore Scientific Exos-2
Scope: Explore Scientific ED102CF, Orion 60mm guidescope
Camera: QHY163C and QHY5L-ii
Filter: Optolong L-eNhance 2"
Software: ASCOM, PHD2, CDC, Stellarium, Sharpcap Pro, NINA, Deep Sky Stacker, Affinity Photo, Lightroom
Computer:  ASRock X570 Steel Legend, AMD Ryzen 7 3700X 8-Core Processor, 3600Mhz
Extras:  Lots of 3D printed parts I designed for improved usability


Re: RA Axis Issues #EXOS2

Justin Bailo <bailo.justin@...>
 

Yes this is correct. It has never happened in the past, I don't know why the scope is leaning left no matter where I put it. I can change the center of mass on the scope to the right side of it, and it will fly like it's being pulled back to that 11:00 position. The mount itself is also pretty new, within 4 months.


On Sun, Jul 26, 2020 at 1:55 PM Robert Hoskin <devonshire@...> wrote:
Justin,
 
Just playing this back for clarity, I think that you are saying that when you are trying to balance your mount, it does not swing freely through a full arc, with the clutch off, but instead sticks at a couple of points.  I think you are also saying that this is a new development and you had not noticed it until recently.  
 
Is this correct?

- Bob
 
--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


Re: RA Axis Issues #EXOS2

 

Justin,
 
Just playing this back for clarity, I think that you are saying that when you are trying to balance your mount, it does not swing freely through a full arc, with the clutch off, but instead sticks at a couple of points.  I think you are also saying that this is a new development and you had not noticed it until recently.  
 
Is this correct?

- Bob
 
--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


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

Scott Edens
 

Hi Dave! I took this image over the course of a couple of nights here in Redding Ca. which is a bortle class 4-5 sky. I think I used a CLS filter on this as I have a street light near by. It has about 5 hours of total expose with combined 60 second subs to get the core and 240 second subs for detail. The total number of subs was around 50 or 60 if I remember correctly. 


RA Axis Issues #EXOS2

Justin Bailo <bailo.justin@...>
 

Hello, I have a EXOS2-GT PMC-8 and it is giving me some trouble with the RA axis. My RA axis has been perfectly fine, no issues. other then when I set it up recently. I noticed the mount for some reason when looking at it from the front , it would keep bouncing back to 11:00.

I have my scope mounted and balanced to my best ability. 
I home the Dec axis, then the RA axis. Then I take the RA and turn it horizontal counterweights to one side, the scope to the other. With the CLUTCH FULLY UNLOCKED, If I let it go while holding the counterweights on the right side, the counterweights will drop to 5:00 and the top to 11:00, So then I try  taking the counterweight to the left side, and when I release the counterweights swing past, then back to 5:00 and the scope to 11:00. 

The absolute best way I can describe what it feels like is, The scope is level, then I push to the left, it's smooth, it almost pulls the scope all the way. when I push to the right, it feels like i'm pulling against a rubber band thats building up, building, then when i let go all the tension releases and it bounces back to 11:00


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

Dave Cherry
 

Hi Scott and welcome,
That's a nice shot of Andromeda there. What level of light pollution did you have when that was taken?

Did you use any filtering?
Number/length of subs please.

Thanks
Dave
--
Scopes: Sky Watcher 200PDS, Skywatcher 72ED
Mount: Explore Scientific PMC8 EXO2
Cameras: ASI 294MCPRO Coooled, Altair guide cam + 50mm scope
Software: Sharpcap Pro ,PH2, Stelarium Startools

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