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Equipment Discussions >> Mounts

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Hilmi
Post Laureate
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Reged: 03/07/10

Loc: Muscat, Sultanate of Oman
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: orlyandico]
      #6124192 - 10/08/13 06:40 AM

Orly,

If you look at both these mounts, their strength lies in their ability to image unguided and both have built in routines for Polar alignment.


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Hilmi]
      #6124492 - 10/08/13 10:07 AM

I looked at my first photos- round stars in 30 seconds, but I handicapped the GM1000 by not following up with a new mount model. I will probably have a chance for another run Friday with the C11 at f/10 and f/7.5 again (assuming the rain clears out). The f/7.5 reducer made nice tight stars- I'll need to dial down the camera sensitivity to support longer exposures.

-Rich


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Nezar H
member


Reged: 08/11/11

Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6126717 - 10/09/13 10:38 AM

I have GM4000 QCI 2012 Model , so far I am so pleased with this mount, it's easy as 123 and you are done (easier than my AP1200GTO3),until now I only use the mount for Visual use , for public outreach program (CDK24") in the way next week!! I have 14"HD @ 4meter F.L. and I add 2X Barlow + 10mm EP. I can get the Target every time either on the center or somewhere on the FOV (after 15star model) And not so accurate PA. I have Modded canon 450D try a quick test for 60sec And got round star !! Well I know this is seems totally nothing but there were a Bright smile over my face ! This is only the start to my adventure to Astrophotography world .
I think some will not be happy to know I have high end mount and 24"telescope and I am only Visual and some DSO work, but I should say It was my dream to build observatory for public outreach program on my home! and to use the Instruments to educate and practice by my won some scientific or Astrophotography work Hopefully.. I hope the Mount will not let me down specially when guiding my most nightmare! Thanks.
Nezar.


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Per Frejvall
sage


Reged: 09/28/12

Loc: Saltsjöbaden, Sweden
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Nezar H]
      #6127244 - 10/09/13 03:19 PM

And your QCI is without encoders... How's that for mechanical quality?



/per


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Nezar H
member


Reged: 08/11/11

Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Per Frejvall]
      #6128509 - 10/10/13 08:20 AM

indeed so happy with this mount .. I hope the official support will be there when I need it , Hopfully Astro-Physics kind customer support .

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tom63
member
*****

Reged: 08/15/13

Loc: Munich / Germany / Europe
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: GIR]
      #6135557 - 10/13/13 06:24 PM


... opened a new thread.


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Tonk
Postmaster
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: tom63]
      #6142385 - 10/17/13 07:42 AM

Quote:

... opened a new thread.




OK - but put a link to it here please - otherwise we have no idea where it is continued .... you don't even say what it is called

Edited by Tonk (10/17/13 07:43 AM)


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tom63
member
*****

Reged: 08/15/13

Loc: Munich / Germany / Europe
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Tonk]
      #6142933 - 10/17/13 01:13 PM

sorry ...
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/6137327/page...


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: tom63]
      #6142978 - 10/17/13 01:38 PM

I have a bunch o new photos taken with the GM1000HPS last weekend with the C11 at f/10 (2800mm FL) where it went an hour with no commands from me to change position. I shot a section of the Pleiades, I'm hoping to have a chance to get some of that posted in the next couple of days.

-Rich


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orion69
scholastic sledgehammer


Reged: 05/09/10

Loc: Croatia
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6143294 - 10/17/13 04:36 PM

Quote:

...where it went an hour with no commands from me to change position.




What does that mean?


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: orion69]
      #6143881 - 10/17/13 10:26 PM

I pointed it at a spot at the sky, and let it track for an hour while taking pictures.

-Rich


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6144044 - 10/18/13 12:28 AM

OK, my lack of patience got the better of me and I have been playing with my pix with the C11 on the GM1000HPS. So, what I did was start taking images at 10:08PM and stopped at 11:37 PM. This is a sampled stack across that time range. They are 30 second exposures, and the size of the airy disk changed because I was putting aperture masks on in the middle frames (to answer another question). The camera is a Pentax K-5, where the parent frame is 4924 pixels wide by 3264 high. I had to scale it for here, so I have the top right corner included.

Anyway, the mount tracking on the GM1000 appears to have been ostensibly perfect, with a linear error in the X direction to the tune of

49.1 pixels in X and 155.4 pixels in Y, where it slowly increased over time, which appears to be polar alignment error after a three star alignment, a quick align on Polaris, and then a follow-up three star alignment.

-Rich


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6144046 - 10/18/13 12:30 AM Attachment (21 downloads)

Overall image of M45 while rising:

-Rich


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6144048 - 10/18/13 12:31 AM Attachment (15 downloads)

Upper right corner crop:

-Rich


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6144091 - 10/18/13 01:11 AM Attachment (29 downloads)

So, here is a rough time graph. Unfortunately, taking the data with 1 minute resolution leaves the drift of a few pixels in doubt.

Anyway, I expect it will meet Hilmi's 20 minute unguided requirement, but at the moment I am wondering why the exposure will need to be so long.

And by the way, I know these aren't beautiful. That isn't the objective.

-Rich

Edited by Starhawk (10/18/13 01:12 AM)


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Hilmi
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Reged: 03/07/10

Loc: Muscat, Sultanate of Oman
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6144182 - 10/18/13 02:51 AM

Starhawk. I don't need 20 min unguided but I do need 20 min exposures for narrow band imaging. I find you really need to go for long exposures especially with SII filter images. Thanks for the feedback

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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Hilmi]
      #6144671 - 10/18/13 11:22 AM

Hilmi,

That makes sense for SII. The mount is very responsive- and at 15 degrees per second slewing, it's really quick and nimble. It has a large pointing model capability. I'm wondering if that may even quietly include c11 mirror flop as a result of motion. In any case, there don't seem to be any sleeping gotchas at this point. The three star alignment with one shot at polar alignment left me with no swirl (the brig star image in the corner is the start of the run and the end if the run stacked, so you can see there was no rotation whatsoever).

I didn't want to end the evening with nothing but engineering images, so I finished with a large series on Orion. I should be able to get that assembled this weekend.

The surprise for me has been how mature this controller is since it isn't one a fourth or fifth generation product from this vendor. They apparently found people with real expertise in this field to get a lot of the internals right.

I should have my last real chance to do major imaging with the mount in early November. Then I'll have to give it back. I expect to miss it.

-Rich


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CounterWeight
Postmaster
*****

Reged: 10/05/08

Loc: Palo alto, CA.
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6144878 - 10/18/13 01:10 PM

Rich - great report - much appreciated.

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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: CounterWeight]
      #6144933 - 10/18/13 01:43 PM

Thanks, Jim.

-Rich


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EFT
Vendor - Deep Space Products
*****

Reged: 05/07/07

Loc: Phoenix, AZ
Re: ASA DDM60 Pro vs. GM1000HPS new [Re: Starhawk]
      #6145844 - 10/18/13 11:31 PM

Rich,

Could you explain the blurry look of the start in the upper right corner image? I'm not sure that I understand what this is a result of.

Ed.


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