Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
Get a Cloudy Nights T-Shirt Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu uh, User

Equipment Discussions >> Mounts

Pages: 1
tboss70
Carpal Tunnel
*****

Reged: 11/25/05

Loc: Missouri
CGEM results while guiding
      #5116567 - 03/11/12 11:27 AM

For the CGEM owners who are using their mounts for guided, or unguided, astrophotography, what have been your results?

I'm curious if you have success at 500mm? 1500mm? How long have the subs been?

Thanks for the info!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mapleton
professor emeritus


Reged: 12/06/09

Loc: United States
Re: CGEM results while guiding new [Re: tboss70]
      #5117055 - 03/11/12 03:57 PM

Unguided with a Televue 76, I've gotten pin point stars up to 4:30 seconds. With the 102, I've gotten 3 minutes. Hypertuned I truly believe I could do better because my mount is not the smoothest (came that way new).

Post Extras: Print Post   Remind Me!   Notify Moderator  
SureshotPL
sage


Reged: 10/09/06

Loc: Michigan
Re: CGEM results while guiding new [Re: Mapleton]
      #5117425 - 03/11/12 08:58 PM

I routinely take 20 and 30 minute guided subs with my ED80.I can post a 100% crop of a sub if you'd like.

Post Extras: Print Post   Remind Me!   Notify Moderator  
tboss70
Carpal Tunnel
*****

Reged: 11/25/05

Loc: Missouri
Re: CGEM results while guiding new [Re: SureshotPL]
      #5117563 - 03/11/12 10:43 PM

Thanks for the comments. I would love to see the sub.

Post Extras: Print Post   Remind Me!   Notify Moderator  
SureshotPL
sage


Reged: 10/09/06

Loc: Michigan
Re: CGEM results while guiding new [Re: tboss70]
      #5117632 - 03/11/12 11:26 PM

This is from a 30min Ha sub i took a few weeks ago:



Post Extras: Print Post   Remind Me!   Notify Moderator  
tboss70
Carpal Tunnel
*****

Reged: 11/25/05

Loc: Missouri
Re: CGEM results while guiding new [Re: SureshotPL]
      #5117964 - 03/12/12 08:10 AM

Nice, thanks Kyle.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Orion58
scholastic sledgehammer


Reged: 10/28/11

Loc: Southern Wisconsin
Re: CGEM results while guiding new [Re: tboss70]
      #5118028 - 03/12/12 09:14 AM

My (autoguided) imaging has been done at 1280mm (f/6.4). If my rig is balanced/aligned properly and the wind is calm, I can take 4 min subs with few problems. I have not attempted longer subs. Wind is the biggest issue for me...if it is calm, things just seem to go SO much better...

Post Extras: Print Post   Remind Me!   Notify Moderator  
sparky123
sage
*****

Reged: 06/14/10

Loc: 41°N 96°W
Re: CGEM results while guiding new [Re: Orion58]
      #5913503 - 06/10/13 04:18 PM

im using a "stock" cgem and run guided 10 minutes subs with no problem.

Post Extras: Print Post   Remind Me!   Notify Moderator  
orion69
scholastic sledgehammer


Reged: 05/09/10

Loc: Croatia
Re: CGEM results while guiding new [Re: sparky123]
      #5913513 - 06/10/13 04:24 PM

Almost all my images are 30 min subs @ 765mm or 900mm (Equinox 120, now sold), to this day never dropped a single sub because of mount error.

Sorry, just saw this is old thread...


Edited by orion69 (06/10/13 04:31 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Raginar
Postmaster
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: CGEM results while guiding new [Re: tboss70]
      #5914067 - 06/10/13 09:20 PM

I was able to do 8 and 10 minute exposures with my CGEM at 1600, 1200, 800 and 650mm.

The key to it was keeping the weight down to a manageable level (around 20# for my particular one).

It improved significantly after hypertuning it.


Post Extras: Print Post   Remind Me!   Notify Moderator  
dksolar3294
member


Reged: 08/22/12

Re: CGEM results while guiding new [Re: Raginar]
      #5915147 - 06/11/13 02:16 PM

I've got a 3yr old CGEM & routinely see a lot of "eggs". Besides the main mount, guide quality is also dependent on guider hardware (scope, mount, camera) & software. For you guys getting nice round stars at 10+ min, what guide equipment / software are you using ?

Post Extras: Print Post   Remind Me!   Notify Moderator  
orion69
scholastic sledgehammer


Reged: 05/09/10

Loc: Croatia
Re: CGEM results while guiding new [Re: dksolar3294]
      #5915289 - 06/11/13 03:42 PM

Quote:

I've got a 3yr old CGEM & routinely see a lot of "eggs". Besides the main mount, guide quality is also dependent on guider hardware (scope, mount, camera) & software. For you guys getting nice round stars at 10+ min, what guide equipment / software are you using ?




Hardware is in my signature, software is PHD.


Post Extras: Print Post   Remind Me!   Notify Moderator  
gmartin02
scholastic sledgehammer
*****

Reged: 04/11/05

Loc: Santa Clarita, CA
Re: CGEM results while guiding new [Re: orion69]
      #5915625 - 06/11/13 06:33 PM

Hi Knez,

I noticed you are using a SX Lodestar + TSOAG9 combo for guiding. I am currently using a guide scope, but I am thinking of getting this combo myself for guiding with my AT8RC. I also have shorter length scopes I use for AP (Tak FS-60CB & Orion 110 ED).

Is there any reason not to also use an OAG for the shorter focal length telescopes?

Greg


Post Extras: Print Post   Remind Me!   Notify Moderator  
orion69
scholastic sledgehammer


Reged: 05/09/10

Loc: Croatia
Re: CGEM results while guiding new [Re: gmartin02]
      #5915856 - 06/11/13 09:20 PM

OAG is always recommended (at least I'm recommending it to everyone, but everyone is not listening ) no matter which FL.
It's the best way of guiding.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Whaleboy
member


Reged: 06/20/12

Loc: Los Angeles
Re: CGEM results while guiding new [Re: orion69]
      #5916281 - 06/12/13 02:47 AM

Before the local sky went bad on me a few months ago (clouds roll in every night, or *BLEEP* seeing), I was doing Narrow Band at 952mm and 760mm (5" refractor and 6" Mak-Newt), OAG, with 20 to 30 min exposures, and didn't lose a single sub. I did hypertune though (with the kit). My first attempts at imaging were mixed (although all in all I was pretty happy). Once I went to CCD with OAG, and hypertuned, any minor issues went away. Although to be fair, I got the ccd OAG setup and hypertuned at the same time (if memory serves), so it may have performed just as well without the hypertune, although I can tell it smoothed things out for sure.

I've since upgraded to an AP Mach1, which I've barely had a chance to image with due to the previously mentioned weather. As soon as I have a little free time, I need to sell the CGEM, but for the time I used it, it worked great.

-David


Post Extras: Print Post   Remind Me!   Notify Moderator  
PhilCo126
Post Laureate


Reged: 01/14/05

Loc: coastline of Belgium
Re: CGEM results while guiding new [Re: Whaleboy]
      #5918310 - 06/13/13 07:54 AM

10 minutes should be no problem with a good CGEM

Post Extras: Print Post   Remind Me!   Notify Moderator  
Raginar
Postmaster
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: CGEM results while guiding new [Re: PhilCo126]
      #5918912 - 06/13/13 02:29 PM

Honestly getting a good guider (lodestar) and switching to a finder-guider really helped. Other things to look for is how much weight you have on the scope (lower is better) and if you're using a finder guider, attach it to the scope it's guiding... for some reason that reduced differential flexure for me.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
10 registered and 29 anonymous users are browsing this forum.

Moderator:  Dave M, richard7, bilgebay 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 1206

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics