Date   

Wes Mcdonald
 

Koen 

Well you will remain limited in terms of your exposure times until you do go to guiding.  The iexos has more periodic error than the exos 2 in theory but neither can be used for long exposures without guiding.  

I must say though that at 200mm being limited to less than 13 seconds seems extreme.

Maybe you experienced dec backlash after you turned the mount south.  Try deliberately biasing the dec axis so that when the scope points to the southeast the scope has no tendency to swing across the dec backlash.  Heavy camera end on the telescope is what you need.  Try that.

One day though you will need to guide.   But you should be ok with shirt exposures at 200 mm I would think.

Have you adjusted your backlash?

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


Koen M.
 

Hi Wes,

So what you are saying is that it would be best that  put some autoguide on it?
I am technically very incompetent :p so i have no idea how that would work to set up (hell i still dont understand that ASCOM stuff :p )


Wes Mcdonald
 

Koen 

One thing to remember is that tracking imperfections due to period of error are far less looking near north.  This is because ra errors do not stats very much on the camera focal plane looking north.  But when you look south things fall apart rapidly.  So my guess is that you have found the limit of unguided images at 200 mm looking south for your iexos.  

That’s just how it works.

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


Jerry Hubbell - Explore Scientific VP Engineering
 

Hi Koen,

This problem is not related to a difference between tracking a star and a planet as there is no difference. The main rate is sidereal rate based on the rotation of the earth. Planets just don't move that quickly in the sky from night to night, let alone from minute to minute. The issue could be a loose clutch getting loser when slewed back and forth, or something else mechanical.

--
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!


Bob Trepiccione
 

I experience this same issue as well, also using stellarium (finally got it working properly, thank you Wes - your appearance on the YouTube live show the other day...)

Is there a way to change the tracking type (lunar, solar, sidereal...) I don't see it anywhere.  Maybe in the ascom setup?



Sent from my T-Mobile 4G LTE Device


-------- Original message --------
From: Tim Huseby <Photographybytjh@...>
Date: 7/13/20 2:43 PM (GMT-05:00)
To: MAIN@ESPMC-Eight.groups.io
Subject: Re: [ESPMC-Eight] Tracking going wrong #alignment #astrophotography #ExploreStars #iexos-100 #TECHNICAL #Windows10

Koen,

     That is interesting, I use Stellarium, I don’t know the explore stars app operation. Could it be backlash (play in the gears) when after it does the meridian flip if you going east to west.
--
Tim
Las Vegas
Just starting in this Hobby, I have been doing wildlife and landscape photography. 
Mounts
Exos2-gt  PMC-8, Celestron Alt/Azimuth 

Scopes/Lenses:
Celestron SLT 130, Olympus 7-14,12-40,40-150 Pro and a Canon FD 500L

Cameras: 
Olymous om-d E-M1 Mkii,


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
 

Thanks Wes, and yes it such a shame its so ‘unusable’   ahahah!.

Dave

 

 

Sent from Mail for Windows 10

 

From: Wes Mcdonald
Sent: 13 July 2020 18:47
To: MAIN@ESPMC-Eight.groups.io
Subject: Re: [ESPMC-Eight] Astrophotography done with the iEXOS-100 and EXOS 2 post your picture and details lets show what this mount can do. #iexos-100 #EXOS2 #astrophotography

 

Nice Dave.  It's a shame the Exos2 can't be used for astrophotography, hahahahahahaha.


--
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

 


--
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: 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 Don,

 

No I use Sharpcap , I find it very accurate and easy to use for this purpose.

 

Thanks

Dave

 

Sent from Mail for Windows 10

 

From: Michael Whitaker
Sent: 13 July 2020 18:41
To: MAIN@ESPMC-Eight.groups.io
Subject: Re: [ESPMC-Eight] Astrophotography done with the iEXOS-100 and EXOS 2 post your picture and details lets show what this mount can do. #iexos-100 #EXOS2 #astrophotography

 

Hi Don. Do you polar align with the Exos-2 using polar scope. Cheers mick. 



On 13 Jul 2020, at 18:35, Dave Cherry <andromedacity@...> wrote:

That's a great shot Bill, What the focal length you are using there?
I'm not having much luck with galaxies at the moment but i did take this one of the Pacman Nebula Last night

I think it was 1 1/2 hours of 3 min subs , 1 master dark
Zwo duo band filter

Cheers
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

<PacMan_Nebula_Dave_Cherry_July_2020.jpg>


--
Michael Whitaker
Wakefield, UK. 
MOUNTS. Exos-2 PMC Eight..
SCOPE: RVO Horizon 72ed. 
CAMERA: Not Applicable. 
SOFTWARE: Just iPad at moment. 

 


--
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


Tim Huseby
 

Koen,

     That is interesting, I use Stellarium, I don’t know the explore stars app operation. Could it be backlash (play in the gears) when after it does the meridian flip if you going east to west.
--
Tim
Las Vegas
Just starting in this Hobby, I have been doing wildlife and landscape photography. 
Mounts
Exos2-gt  PMC-8, Celestron Alt/Azimuth 

Scopes/Lenses:
Celestron SLT 130, Olympus 7-14,12-40,40-150 Pro and a Canon FD 500L

Cameras: 
Olymous om-d E-M1 Mkii,


Koen M.
 

and also when i slew to Sadira it also gives trails and not the round stars so i dont think it is because of rotation and orbit of Jupiter


Koen M.
 

Well i used the thing in ExploreStars to slew to jupiter, if what you say is correct one should think the tracking rate would be set up as it should in that program, no?


Re: Data Missing File Error #ExploreStars #G11

Kent Marts- Explore Scientific Customer Service
 

Download the Configuration Manager, if you have not already done so. 

It is found here, just below the video: https://explorescientificusa.com/pages/software-and-downloads-for-pmc-eight-system

Read the instructions on the Instruction tap, then click on the ExploreStars tab and follow the directions.

--
Kent Marts
Customer Service Manager
Explore Scientific

Gear: Anything in the store!


Tim Huseby
 
Edited

Koen,

      I could be wrong here as I am new to tracking Astro photography. I believe that tracking a planet would need to be at a different tracking rate/speed as it is moving in an orbit plus rotation of the earth. To me it sounds like your star photos are really sharp which lead me to this idea. Also longer focal lengths un guided can be difficult.
--
Tim
Las Vegas
Just starting in this Hobby, I have been doing wildlife and landscape photography. 
Mounts
Exos2-gt  PMC-8, Celestron Alt/Azimuth 

Scopes/Lenses:
Celestron SLT 130, Olympus 7-14,12-40,40-150 Pro and a Canon FD 500L

Cameras: 
Olymous om-d E-M1 Mkii,


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 Dave.  It's a shame the Exos2 can't be used for astrophotography, hahahahahahaha.

--
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: 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

 

Sorry. Dave. 


On 13 Jul 2020, at 18:41, Michael Whitaker via groups.io <mwhitaker285@...> wrote:

Hi Don. Do you polar align with the Exos-2 using polar scope. Cheers mick. 


On 13 Jul 2020, at 18:35, Dave Cherry <andromedacity@...> wrote:

That's a great shot Bill, What the focal length you are using there?
I'm not having much luck with galaxies at the moment but i did take this one of the Pacman Nebula Last night

I think it was 1 1/2 hours of 3 min subs , 1 master dark
Zwo duo band filter

Cheers
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
<PacMan_Nebula_Dave_Cherry_July_2020.jpg>

--
Michael Whitaker
Wakefield, UK. 
MOUNTS. Exos-2 PMC Eight..
SCOPE: RVO Horizon 72ed. 
CAMERA: Not Applicable. 
SOFTWARE: Just iPad at moment. 

--
Michael Whitaker
Wakefield, UK. 
MOUNTS. Exos-2 PMC Eight..
SCOPE: RVO Horizon 72ed. 
CAMERA: Not Applicable. 
SOFTWARE: Just iPad at moment. 


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

 

Hi Don. Do you polar align with the Exos-2 using polar scope. Cheers mick. 


On 13 Jul 2020, at 18:35, Dave Cherry <andromedacity@...> wrote:

That's a great shot Bill, What the focal length you are using there?
I'm not having much luck with galaxies at the moment but i did take this one of the Pacman Nebula Last night

I think it was 1 1/2 hours of 3 min subs , 1 master dark
Zwo duo band filter

Cheers
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
<PacMan_Nebula_Dave_Cherry_July_2020.jpg>

--
Michael Whitaker
Wakefield, UK. 
MOUNTS. Exos-2 PMC Eight..
SCOPE: RVO Horizon 72ed. 
CAMERA: Not Applicable. 
SOFTWARE: Just iPad at moment. 


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 great shot Bill, What the focal length you are using there?
I'm not having much luck with galaxies at the moment but i did take this one of the Pacman Nebula Last night

I think it was 1 1/2 hours of 3 min subs , 1 master dark
Zwo duo band filter

Cheers
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


Koen M.
 

A few days ago i finally had some time to go out again with the iEXOS100
I set up my mount, polar align it.
I let the camera slew to Dubeh and it tracks the way it should be. (see pic Dubhe.jpg) 
this was located North to North-west from my position

Then i let it slew to vAnd, and it goes as it should be (see pic vAnd.jpg)
This was North-east from my position

From pointing to vAnd i let it slew to Jupiter which is South-East to south from my position.
I take the same testpicture i did with the other 2 and when i look at the picture, Jupiter and its moons are not tracked but they are lines you would expect when you use a non tracking mount (startrails, see jupfail.jpg


All 3 pictures are taken with f6.3 at 13seconds shutterspeed and 200mm




)

This is not the first time i have this problem, it looks like everything i point at from North to West fails and everything from West to nord goes as it should.



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
 

Thanks Wes!
I asked my daughter and son-in-law which they liked best and they picked number one, but neither of them are in the hobby.
This made me think of a conversation on the OpenGoTo Community podcast the other day. There was some discussion about color saturation and contrast preferences.
I'm thinking about making a polling post just to see which one gets the most votes. Of course, people in the hobby may have a different opinion vs. laypersons.

--

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

Mounts: EXOS II PMC-Eight, LXD75

Cameras: ZWO ASI294MCPro, ASI385


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 bill.  I like number 2 the best, shows the milky blue nicely 

We’d

--
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: 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
 

We had a couple of days of clear skies, so I went out and shot one of my favorite targets, M51.
I can't decide which post processing I like better. These are the same shot, but one with more vibrant colors/more contrast and the other more subdued colors/less contrast.

Mount: EXOS II with PMC 8
Imaging Scope: Celestron C8 with 0.63 focal reducer
Imaging Camera: ASI294MCPro
Guide Scope: AT80 APO with 0.8 focal reducer
Guide Camera: ASI385
Imaging Software: SharpCap Live Stack and Polarr post processing
Data: 45 1-minute lights, 15 1-minute darks, and 50 0.6-second flats


--

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

Mounts: EXOS II PMC-Eight, LXD75

Cameras: ZWO ASI294MCPro, ASI385

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