DPReview.com is closing April 10th - Find out more

dark current noise

Started Jan 5, 2016 | Discussions thread
Astrotripper Veteran Member • Posts: 8,676
Re: Home-made "slim" T-Ring adapter for Micro 4/3
1

alexisgreat wrote:

I wanted to compliment you again on some great ingenuity here,

Thanks

I also wanted to add that I think you can also use 1.25" filters, you could screw them where the barlow goes (and if the barlow is threaded for filters use both together also.)

Yes, I think I mentioned that before. Also, the chrome part of the tube is also screwed on and can be replaced by one from one of the Sky-Watcher eye-pieces. I earlier wrote that it's shorter, but when I checked now, it turns out I was wrong, it's simply the exact same part. Looks like all the kit accessories Sky-Watcher made for the telescope I have are made to share as much parts of their construction.

I wonder what the minimum distance from filter to focal plane would be with your set up?

The distance from the base of the custom T-ring, to the end of the barlow lens tube (where you would screw the filter on) is 65mm. It's about 55mm alone, without a T-ring. So it's a pretty long thing, much longer than a dedicated threaded nosepiece that you linked to earlier.

 Astrotripper's gear list:Astrotripper's gear list
Sigma DP2 Merrill Olympus PEN E-PL1 Panasonic Lumix DMC-GM5 Olympus E-M1 II OM-1 +15 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow