Search found 24 matches

by Chuckwagon
Tue Jan 07, 2020 8:57 pm
Forum: Cameras
Topic: ZWOasi1600mc-c captures stars as doubles
Replies: 6
Views: 87

Re: ZWOasi1600mc-c captures stars as doubles

I've read that the MI-250 can be difficult to balance, and does not like perfect balance but performs better with a little bias to keep the gears engaged and avoid "bouncing." Since you aren't guiding, and the backlash issues that can cause are not an issue, it is possible there's an issue with gear...
by Chuckwagon
Tue Jan 07, 2020 7:07 am
Forum: Cameras
Topic: ZWOasi1600mc-c captures stars as doubles
Replies: 6
Views: 87

Re: ZWOasi1600mc-c captures stars as doubles

That is a tracking issue and not the camera. What mount are you using? Are you guiding the mount? 90 seconds is more than enough time for a Periodic Error issue to show. However, this type of image is common when guiding and encountering a backlash issue. So knowing the mount and whether you are gui...
by Chuckwagon
Mon Dec 16, 2019 6:54 am
Forum: Cameras
Topic: ASI071MC-P
Replies: 1
Views: 248

Re: ASI071MC-P

The Sony IMX071 is listed under the heading of "Not Backlit + Not Stacked" in the Wikipedia listing for Exmor.
by Chuckwagon
Thu Dec 12, 2019 9:18 am
Forum: Cameras
Topic: ASI6200 nosepiece flange backfocus
Replies: 8
Views: 438

Re: ASI6200 nosepiece flange backfocus

I think the question is about the little flange at the base. I'd guess it's only 2mm or so thick.

To NPB, why the concern? Are you trying to use a focal reducer or a flattener and have a specific spacing you are trying for?
by Chuckwagon
Sat Nov 23, 2019 10:54 pm
Forum: Cameras
Topic: looking for full frame CMOS , cooled, with ~6um pixels
Replies: 5
Views: 605

Re: looking for full frame CMOS , cooled, with ~6um pixels

With the ASI128MC in short supply or out of stock and seemingly discontinued, the new ASI6200MC-Pro, due late Jan. 2020, and similarly priced, would be the option. It's pixels are smaller, but with 60MP to play with, binning would somewhat address the pixel size issue.
by Chuckwagon
Thu Nov 14, 2019 5:25 am
Forum: Accessories
Topic: EAF William Optics Compatibility?
Replies: 15
Views: 2047

Re: EAF William Optics Compatibility?

Another handy tip. Thanks!

:)
by Chuckwagon
Wed Nov 13, 2019 8:12 pm
Forum: Accessories
Topic: EAF William Optics Compatibility?
Replies: 15
Views: 2047

Re: EAF William Optics Compatibility?

Ah, I see. Cool. Thanks for the clarification, and the how-to.
by Chuckwagon
Mon Nov 11, 2019 7:27 am
Forum: Accessories
Topic: EAF William Optics Compatibility?
Replies: 15
Views: 2047

Re: EAF William Optics Compatibility?

That's excellent!

Does not having a focus lock screw after the mod affect performance at all? With my focus lock completely loosened it seems a little sloppy. I usually leave that screw loose enough to adjust focus, but with a bit of resistance.

Thanks!
by Chuckwagon
Thu Nov 07, 2019 4:31 am
Forum: Cameras
Topic: Focus Issues
Replies: 4
Views: 767

Re: Focus Issues

What brand and model of coma corrector are you using? Does it have instructions? Generally, there should be a specification for the coma corrector that tells you how much spacing needs to be between the corrector and the image sensor. Then you need to assemble the various spacers and connectors to m...
by Chuckwagon
Wed Nov 06, 2019 4:33 pm
Forum: Accessories
Topic: EAF William Optics Compatibility?
Replies: 15
Views: 2047

Re: EAF William Optics Compatibility?

That's very helpful. Thanks Katherine.