Date   

Re: M24

Jeff Snell
 

Thanks for the feedback Wes.  Yes, all guided with PHD2.  My FOV is all south out over Ogden UT and then on to the Salt Lake City area.  Pretty high light pollution and all the targets I wanna shoot at this point are fairly low in the south.  I have a couple of dark sky areas within an hour so just need to get out and away to eliminate that as a factor.  PHD tracked well last night with total remaining around .5 all evening.

I find this target fascinating with such a dense star field.  Guess I’ll drop some coin on a ES field Flattener soon😎

Thanks again.
Jeff


On Jun 24, 2020, at 6:43 PM, Wes Mcdonald <wesmcd6@...> wrote:


Jeff:

Nice pic!

1.  If stars are displaying comma in all four corners then yes, a field flattener will address that.  
2.  If you have comma in pne corner and not others then that might be an alignment issue with the camera focal plane relative to the line of sight.  This will certainly cause focus error, as part of the focal plane is further away from the center and part is closer than the center to the objective.
3.  Vignetting is pretty much always present which is why we do flats.  Flats basically are used to correct the transfer function of light passing through the optical system as a function of radial distance from the center.  If you have light somehow entering off axis and getting scattered around I wouldn't try to eliminate it by a flattener.  Taking a series of flat images won't help either as these are done with a uniformly illuminated aperture. 

Image looks nice.  Great focus  Tracking obviously good enough to render nice round stars.  The star field is very dense around there, and after looking at other images I think what you might be thinking of a sky glow might well be faint nebulosity that appears in all other photos I inspected. 

It seems clear for your 80mm, the PMC8 guiding is doing just grand.  If you were not guiding, then Bully Bully.  240 secs is amazing.

Wes.

 



--
Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired


Re: M24

Wes Mcdonald
 

Jeff:

Nice pic!

1.  If stars are displaying comma in all four corners then yes, a field flattener will address that.  
2.  If you have comma in pne corner and not others then that might be an alignment issue with the camera focal plane relative to the line of sight.  This will certainly cause focus error, as part of the focal plane is further away from the center and part is closer than the center to the objective.
3.  Vignetting is pretty much always present which is why we do flats.  Flats basically are used to correct the transfer function of light passing through the optical system as a function of radial distance from the center.  If you have light somehow entering off axis and getting scattered around I wouldn't try to eliminate it by a flattener.  Taking a series of flat images won't help either as these are done with a uniformly illuminated aperture. 

Image looks nice.  Great focus  Tracking obviously good enough to render nice round stars.  The star field is very dense around there, and after looking at other images I think what you might be thinking of a sky glow might well be faint nebulosity that appears in all other photos I inspected. 

It seems clear for your 80mm, the PMC8 guiding is doing just grand.  If you were not guiding, then Bully Bully.  240 secs is amazing.

Wes.

 



--
Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired


Re: M24

Jeff Snell
 

To be clear, the FF to correct for the trailing/edge distortion only.  Not the light issues.

Jeff

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


On Wed, Jun 24, 2020 at 4:51 PM Jeff Snell via groups.io <Jeffery.snell1=gmail.com@groups.io> wrote:
Folks,
Took this last night.  Very little processing at this point just levels.  31 light (240s/800ISO), 20 darks, 20 flats with my Canon and the ED80 APO PMC Eight.  I'm getting what appears to be trailing around the edges and some vignetting and possible sky glow in upper right corner (Bortles 5/6 looking directly over the city at about 30 degrees elevation).  I assume this is what a field flattener would fix???

Any critiques welcome including what to add to the imaging train to correct.  Core of the star cloud tracked very nicely so PMC-eightdoing great.

Jeff

PMC-Eight w/Explore Stars
ES ED80mm APO
Celestron 8" Edge HD
Canon Ti-5 w/ Spencer Camera Astro-mod
CdC, APT, Polemaster, PHD2


M24

Jeff Snell
 

Folks,
Took this last night.  Very little processing at this point just levels.  31 light (240s/800ISO), 20 darks, 20 flats with my Canon and the ED80 APO PMC Eight.  I'm getting what appears to be trailing around the edges and some vignetting and possible sky glow in upper right corner (Bortles 5/6 looking directly over the city at about 30 degrees elevation).  I assume this is what a field flattener would fix???

Any critiques welcome including what to add to the imaging train to correct.  Core of the star cloud tracked very nicely so PMC-eightdoing great.

Jeff

PMC-Eight w/Explore Stars
ES ED80mm APO
Celestron 8" Edge HD
Canon Ti-5 w/ Spencer Camera Astro-mod
CdC, APT, Polemaster, PHD2


locked Re: What Platform Do You Use To Run ExploreStars? #poll-notice #poll #ExploreScientific #ExploreStars

Steven Romero
 

I use a MacBook Pro with Kstars and Stellarium

On Wed, Jun 24, 2020 at 6:27 AM Jerry Hubbell - Explore Scientific VP Engineering <jrh@...> wrote:

A new poll has been created:

Please select the platform you prefer to run ExploreStars on

1. Microsoft Windows PC
2. Microsoft Windows Tablet
3. Google Android Tablet
4. Apple iPadOS Tablet
5. Amazon Fire Tablet

Vote Now

Do not reply to this message to vote in the poll. You can vote in polls only through the group's website.


--
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!


--
Steven Romero
Location: Houston, TX and surrounding environs (50%) Midland,TX and a large swath of West, TX (50%)
Mount: EXOS2-GT PMC-8
Scope: ED102 APO
Eyepieces: 24mm, 11mm, 6.5mm (82 deg)
Software: Kstars, Stellarium (OS X)


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

W.F.
 

Hello togehter,
as i said in the GoTo livestream at monday i did some pictures at the 23 of june.

I did both pictures with this equipment:
iEXOS-100 PMC-8
Canon 1000D unmodified
TS Photoline APO 72/432
TS Flattner
MGEN 2 standalone autoguider

I did 10 flatfield pictures
All pictures done with ISO 800
Exposure time 180 sec.
The M 101 is stakked with Sequator and i did 29 single pictures for this, so i collected the light for 89 min.
The M 36 is also stakked with Sequator, 13 single pictures = 39 min.
Then i used also Fitswork and Photoshop 7 for finish the pictures.
Well there was no Moon but i was near by an orange streetlight and it was a little bit windy.
And Andromeda was in the lightpolution of Frankfurt/ am Main, and also the astronomical darknees was over.
But i am happy with this pictures because i still learn how to use my equipment.
Well the iEXOS 100 is a great travelmount and i am stil surpriesed about the payload for astrophotography.
A really good mount!!
Greetings from Germany, Wolfgang.



   


locked Re: What Platform Do You Use To Run ExploreStars? #poll-notice #poll #ExploreScientific #ExploreStars

Jerry Hubbell - Explore Scientific VP Engineering
 

On Wed, Jun 24, 2020 at 11:26 AM, Doug Doonan wrote:
I wish that the W10 version was identical to the Android version.
We are currently testing the updated Windows version and will announce when we will release it.
 
--
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 Re: What Platform Do You Use To Run ExploreStars? #poll-notice #poll #ExploreScientific #ExploreStars

Doug Doonan
 

HI,
 I run wifi using both Android App on tablet, and wifi using W10. I wish that the W10 version was identical to the Android version.
Doug Doonan

--

Doug Doonan
HomeBru  6 inch Reflector  f 6.6
HomeBru  85 mm Refractor  f 5.6
PMC-8, EXOS 2
Long retired EE.


brian skinner
 

Agree chaps, I particularly like the idea of the Polar scope adapted adaptor. Hopefully Jerry and his colleagues will develop this for when I am ready to make the leap to guiding!
Kind regards, Brian


locked What Platform Do You Use To Run ExploreStars? #poll-notice #poll #ExploreScientific #ExploreStars

Jerry Hubbell - Explore Scientific VP Engineering
 

Please select the platform you prefer to run ExploreStars on

Results

See Who Responded


Re: Listen Live Today at 4 pm CDT, 5 pm EDT #OpenGOTOLive

Jerry Hubbell - Explore Scientific VP Engineering
 
Edited

Please join us today for the "OpenGOTO Community Live!" Episode 15
Today's show will be at 4:00 pm CDT, 5:00 pm EDT, and 2:00 pm PDT.


We will be continuing our talk about how to install the latest version of Stellarium and how to configure it to control your
iEXOS PMC-Eight Mount and demonstrate it.

https://www.facebook.com/ExploreScientificUSA/
https://www.youtube.com/ExploreScientificOfficial

https://twitter.com/ExploreCS

I look forward to talking to you then.
--
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

Gernot Schreider
 

Hi Bill,

Thanks for your reply.
I have no focuser so far but I am considering buying one in the future. I hear what you are saying regarding seeing conditions and altitude of the target. I was aware of the altitude influence but I have no practical experience on this so far. So good to hear your advice about the 40 degree rule of thumb.

I have seen the focus assistant in SharpCap but I have not tried it by myself so far. 

clear skies 
Gernot



--
location: 49,55N, 7,89E; mount: EXOS-2 PMC; telescope: Meade 10" ACF; guidescope: Orion 50mm, cameras: Sony Alpha 6000, ASI 120MC-S, laptop: Lenovo; OS: Windows 10 64bit, software: Cartes du Ciel, Sharpcap, Ascom platform, AstroTortilla,


Re: Listen Live Today at 4 pm CDT, 5 pm EDT #OpenGOTOLive

Jerry Hubbell - Explore Scientific VP Engineering
 

Please join us today for the "OpenGOTO Community Live!" Episode 14
Today's show will be at 4:00 pm CDT, 5:00 pm EDT, and 2:00 pm PDT.


https://www.facebook.com/ExploreScientificUSA/
https://www.youtube.com/channel/UC4AR7eOxPBo7UHoJOZcgrTQ
I look forward to talking to you then.
--
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!


Jerry Hubbell - Explore Scientific VP Engineering
 

On Tue, Jun 23, 2020 at 11:00 AM, Robert Hoskin wrote:
If ES were to develop a variant of that adapter, that one could attach a guidescope to, that would answer it for the iExos-100 camera folks...
Hi Bob,

I will add that to our list of Feature Requests on the Feature Request subgroup.

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

Tony
 

I'm a Newbie, so please be gentle with me!

Third time out with the EXOS2-GT PMC8 and the Explore Scientific 208 f/3.9.  Had a frustrating night, took me two hours to get the guidecam to see enough stars to do a polar alignment in sharpcap.  I finally started imaging just after midnight,  and had to pack up around 2am.  I managed to crash the tube into the tripod once, and then waited a little too long to do a meridian flip.  Both times, simply parking the scope and realigning the arrows got me back in the game.  Go-to's with the new firmware are incredibly good, considering I have a zero star alignment.  M16 is clear on the other side of the sky from Polaris, and the go-to got it in the first camera shot.  Two iterations of plate-solving and the target was dead centered. 

We had 9-10 MPH winds last night, but since we haven't had clear skies in a while, I had to get out there while I could.  PHD-2 had some trouble holding the target with the gusts, leading to some blurred stars.  But when it wasn't gusting, it held under .5 RMS fairly regularly.  This was from bortle 6 skies, 20 miles outside of NYC, shooting directly in between street lamps and over my neighbors porch lights and towards the heavier light pollution.  Not too much I can do about that though.

Target:  M16 - Eagle Nebula
Scope: Explore Scientific 208 f/3.9 Newt
Mount: EXOS2-GT PMC-Eight
Guidescope: SVBony 60mm
Guidecam: Generic Amazon AR0130
Imaging Cam: Canon 77d
Acquisition:  APT, PHD2, POTH, Sharpcap for PA.
Processing: SIRIL, Photoshop

15x60" RGB (No Filter)
22x60" Wratten #25 (Poor Man's Ha Filter)


Astrophotography done with ESPMC-8 #astrophotography #EXOS2

Chris Welliver <chriswelliver@...>
 

Hello everyone, I’ve been following this group for a while now, trying to learn the ins and outs of astrophotography with my EXOS2 gt Mount. I took this photo last weekend with my William optics Spacecat 51,(after the sky glow and atmosphere cleared up), and I’m pretty happy with it. Hope y’all like it.
--
Chris Welliver 
EXOS2 mount
ES 102EDAPO Carbon Fiber 
ZWO asi178mc
ZWO asi120mm
PrimaLuceLab Sesto Senso focuser
William optics Spacecat 51
ascom
phd2
stellarium
pegasus Astro pocket power box 


 

Huh...  

That looks pretty similar to the polar finder adapter for the iExos-100.
If ES were to develop a variant of that adapter, that one could attach a guidescope to, that would answer it for the iExos-100 camera folks...


On Tue, Jun 23, 2020, at 10:47, Chris Tardif wrote:
Oh, I have also tried the L-bracket approach too as shown by Peter Zelinka: https://www.peterzelinka.com/blog/2019/4/auto-guiding-with-the-skyguider-pro


--
Mounts: Explore Scientific IEXOS-100 w Celestron CG5 tripod, iOptron CEM 40
Scopes: Explore Scientific FCD-100 ED-102CF, Various Canon lenses, ZWO mini-guidescope, StarField 60mm guide-scope.
CameraASI120MM Mini (mono), Altair GPCAM 130
Control PC: Intel NUC
Loc: 44 -79


Attachments:
  • Capture.JPG


--
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


Chris Tardif
 

Oh, I have also tried the L-bracket approach too as shown by Peter Zelinka: https://www.peterzelinka.com/blog/2019/4/auto-guiding-with-the-skyguider-pro


--
Mounts: Explore Scientific IEXOS-100 w Celestron CG5 tripod, iOptron CEM 40
Scopes: Explore Scientific FCD-100 ED-102CF, Various Canon lenses, ZWO mini-guidescope, StarField 60mm guide-scope.
CameraASI120MM Mini (mono), Altair GPCAM 130
Control PC: Intel NUC
Loc: 44 -79


Chris Tardif
 

Some are better at it than I am, but I was never able to get side-by-side balanced well enough for me.  I found a longer dove tail with the guide scope mounted under worked really well.  It's a much cheaper config too.  You just need a long bar...long enough to make sure the guide camera doesn'tclip the mount.


--
Mounts: Explore Scientific IEXOS-100 w Celestron CG5 tripod, iOptron CEM 40
Scopes: Explore Scientific FCD-100 ED-102CF, Various Canon lenses, ZWO mini-guidescope, StarField 60mm guide-scope.
CameraASI120MM Mini (mono), Altair GPCAM 130
Control PC: Intel NUC
Loc: 44 -79


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

Bill Black
 

Hi Gernot,
Thanks! I'm glad it is useful.

For focusing at long focal lengths, I'm going to say the most important factor by far is the "seeing".
I've tried automated focus routines, like the ones in the SharpCap tools, and I've used my Bahtinov mask as well. They work pretty good, but they work much better when the seeing is good. If the seeing is bad, none of them work for me and you end up fiddling back and forth and get no real improvement.

When I shot the footage of Jupiter the other night, the seeing was very good. I focused without using any tools other than my eyes and electronic focuser buttons. I added a Crayford focuser to my SCT and modified it with an Orion AccuFocus kit (little electric motor that attaches to the shaft on your focuser). However, if the seeing is good, I think you can achieve decent focus with the stock equipment.

Atmospheric is a great tool for predicting what your seeing will be like. It's a weather forecast, so its not 100% accurate, but it seems more accurate than others I've tried.
https://www.astrospheric.com/

Another thing that will affect your seeing is the altitude of your target. The higher the altitude of your target, the better the seeing, because there is less atmosphere to contend with. The other night, Jupiter was less than 40 degrees above the horizon, which is really to low to even be trying in my opinion, but the seeing seemed very stable, so I gave it a shot. Really, I would rather my target be at 50 degrees plus. Mars is a great planetary target this year because it is climbing above 60 degrees. 

Decent focus will be easier to achieve on M57 and M13 for a couple of reasons, I think. One is that they were probably above 50 degrees and two is that you were able to use a shorter focal length (less magnification).

I'm curious what others do for focusing as well, especially at long focal lengths. It is still one of my biggest struggles after many years in this hobby.
--

Bill
Location: Dallas, GA
Scopes:
 Celestron C8, AstroTech 80mm APO

Mounts: EXOS II PMC-Eight, LXD75

Cameras: ZWO ASI294MCPro, ASI385

3601 - 3620 of 10580