Hi to all,
I GOT AT6RC , IT LOOKS GREAT BUT..?..?..?..
Hello - I got AT6RC
Hello - I got AT6RC
- Attachments
-
- At6RC 2.jpg (62.84 KiB) Viewed 4548 times
-
- AT6RC 1w copy.jpg (57.74 KiB) Viewed 4548 times
-
- Posts: 293
- Joined: Sun Oct 05, 2003 6:54 pm
Re: Hello - I got AT6RC
Dude, you just bought yourself a world of pain.
- orly_andico
- Posts: 1616
- Joined: Sun Aug 09, 2009 11:14 pm
- Location: Braddell Heights
- Contact:
Re: Hello - I got AT6RC
Focuser flop is a very common problem on all the GSO RC's.
Upgrading the focuser to a Moonlite or Feathertouch will help, but not completely eliminate the issues.
This is what you want to do:
http://www.cloudynights.com/ubbthreads/ ... er=3573309
OTOH, I think the "world of pain" comment is a bit overblown. Sure the focuser will hurt you, but you'll have bigger problems with tracking. Once your tracking is perfect, then you'll start worrying about the focuser.
Upgrading the focuser to a Moonlite or Feathertouch will help, but not completely eliminate the issues.
This is what you want to do:
http://www.cloudynights.com/ubbthreads/ ... er=3573309
OTOH, I think the "world of pain" comment is a bit overblown. Sure the focuser will hurt you, but you'll have bigger problems with tracking. Once your tracking is perfect, then you'll start worrying about the focuser.
Re: Hello - I got AT6RC
Thanks for advices.
I collected few datas and still waiting for more collection for a perfect image. here i stacked some data just to show you. I think no problem with tracking or guiding and focusing. I used F/6.3 reducer but the spacing won't match as like C8 until some fine adjustment with CCD. very good contrast.
I collected few datas and still waiting for more collection for a perfect image. here i stacked some data just to show you. I think no problem with tracking or guiding and focusing. I used F/6.3 reducer but the spacing won't match as like C8 until some fine adjustment with CCD. very good contrast.
- Attachments
-
- post pic.jpg (64.79 KiB) Viewed 4418 times
- orly_andico
- Posts: 1616
- Joined: Sun Aug 09, 2009 11:14 pm
- Location: Braddell Heights
- Contact:
Re: Hello - I got AT6RC
That looks pretty good... but it's because your small sensor camera is masking the defects.
1) RC's have a lot of coma, which an SCT reducer won't completely fix; but on-axis the coma will be small, and your camera chip is small enough
2) if your focuser is sagging, this will cause tilt of the sensor plane. Again tilt would be most obvious at the edges of a large sensor. On a small sensor.. not so much.
So all's well. For now..
I would be interested to see the result of 10- or 20-minute subs though. That's where flexure and such would rear their ugly heads.
1) RC's have a lot of coma, which an SCT reducer won't completely fix; but on-axis the coma will be small, and your camera chip is small enough
2) if your focuser is sagging, this will cause tilt of the sensor plane. Again tilt would be most obvious at the edges of a large sensor. On a small sensor.. not so much.
So all's well. For now..
I would be interested to see the result of 10- or 20-minute subs though. That's where flexure and such would rear their ugly heads.
Re: Hello - I got AT6RC
I do lots of research on different scopes as I have it now before those are sold.
It’s very hard to decide which is one is best to use!
Here I took two images both are same exposure time.
Meade 8" SCT used F3.3 and AT6RC used F6.3. I know it won’t be same.
Meade 8" SCT showing coma at surroundings but AT6RC isn't.
First 8 inch SCT F/3.3 and AT6RC F/6.3:
It’s very hard to decide which is one is best to use!
Here I took two images both are same exposure time.
Meade 8" SCT used F3.3 and AT6RC used F6.3. I know it won’t be same.
Meade 8" SCT showing coma at surroundings but AT6RC isn't.
First 8 inch SCT F/3.3 and AT6RC F/6.3:
- Attachments
-
- 8inch sct F3-3-2.jpg (49.29 KiB) Viewed 4383 times
-
- At6RC-.jpg (51.83 KiB) Viewed 4383 times