Search found 2658 matches

by Pete
Fri Jan 15, 2021 3:42 pm
Forum: The Imager's Studio
Topic: New camera
Replies: 6
Views: 39

Re: New camera

Hi Bruce, The ASI2600 uses a female 42mm T-thread for mounting. And the 28mm diagonal of your chip will not experience vignetting from a 42mm T-thread. Nor will it have problems with a 1.25" tube to male T-thread adapter as that's 31.75" wide. And it's how I mount the 2600 to the little piggybacked ...
by Pete
Fri Jan 15, 2021 9:17 am
Forum: The Imager's Studio
Topic: New camera
Replies: 6
Views: 39

Re: New camera

Bruce, forget the f/5 focal reducer. Focal reducers are actually image size reducers for use when image size at the focal plane exceeds the boundaries of a small imaging chip. Your C sized chip does that without the focal reducer, and to introduce the focal reducer only creates vignetting. Even with...
by Pete
Thu Jan 14, 2021 10:08 am
Forum: The Imager's Studio
Topic: New camera
Replies: 6
Views: 39

Re: New camera

Hi Bruce, Been wondering when we were going to hear about that new camera. And maybe get an idea as to what your setup's going to be. Your first images are experimental and will be poor. Darks, bias, flats and dark flats are sort of secondary considerations at this point. Because dark frames should ...
by Pete
Wed Jan 13, 2021 11:42 am
Forum: The Imager's Studio
Topic: A long and hugely detailed analysis of 1/10/2021 imaging session
Replies: 8
Views: 44

Re: A long and hugely detailed analysis of 1/10/2021 imaging session

Mark Searles promised clearing after midnight, and I was so hot to check out the mod that I went to bed at 9 and was up at 1pm. Still cloudy. Up again at 2. Still cloudy. Up again at 3. Still cloudy. Up again at 4. Still cloudy. Slept thru 'till 8. Clear and sunny. Well, it did clear after midnight ...
by Pete
Tue Jan 12, 2021 3:02 pm
Forum: The Imager's Studio
Topic: A long and hugely detailed analysis of 1/10/2021 imaging session
Replies: 8
Views: 44

Re: A long and hugely detailed analysis of 1/10/2021 imaging session

Yeah, Bruce. That M42 was a Hyperstar. But you'll notice that the corners are black. Hopefully will get out tonight. Can't take flats until I refocus but I'm still hoping for good things.
by Pete
Tue Jan 12, 2021 12:32 pm
Forum: The Imager's Studio
Topic: A long and hugely detailed analysis of 1/10/2021 imaging session
Replies: 8
Views: 44

Re: A long and hugely detailed analysis of 1/10/2021 imaging session

The Hyperstar might work out after all! This AM I dismounted it. In the subsequent disassembly took a very close look at the Starizona supplied optics to camera adapters. Two were supplied, one for a Canon thread and the other for a 42mm T-thread. Both adapters were a cone shape that went into a cyl...
by Pete
Mon Jan 11, 2021 7:20 pm
Forum: The Imager's Studio
Topic: A long and hugely detailed analysis of 1/10/2021 imaging session
Replies: 8
Views: 44

Re: A long and hugely detailed analysis of 1/10/2021 imaging session

Hi Rog, All of my images are always finished up with Photoshop. Been using the software for 15 years and long ago it was THE software to use for LGBR imaging. Been printing 8 1/2 X 11 images and use PS to size, plus do annotation and minor final tweaks. And it has a button that converts color to B&W...
by Pete
Mon Jan 11, 2021 4:26 pm
Forum: The Imager's Studio
Topic: A long and hugely detailed analysis of 1/10/2021 imaging session
Replies: 8
Views: 44

A long and hugely detailed analysis of 1/10/2021 imaging session

Sunday, 10 Jan 2021 It’s clearing around 18:00 and while I’m looking to make pretty pictures the technical focus is upon Hyperstar vignetting and upon the SharpCap frequently refusing to “see stars” so as to align and stack a live image. On Friday I’d gone through yet another set of flat frame captu...
by Pete
Sun Jan 10, 2021 9:23 am
Forum: The Imager's Studio
Topic: Stars good. Equipment setup not so good.
Replies: 3
Views: 46

Re: Stars good. Equipment setup not so good.

With color one actually gets 4 different histograms on flats. Green to the far right around 70% well depth, red around 30%, blue at 35% and the white average at around 45%. It's a tradeoff. The t shirt frame used fits over the outside of the tube and covers the entire aperture. If tonight's attempt ...
by Pete
Sat Jan 09, 2021 12:52 pm
Forum: The Imager's Studio
Topic: Stars good. Equipment setup not so good.
Replies: 3
Views: 46

Stars good. Equipment setup not so good.

Thursday, 7 Jan 2021 Out at 17:30 powering up computers, cameras and the 14” with its Hyperstar. Tough and frustrating night. NGC 1275 aka the Perseus Cluster and C24 Initiated imaging and SharpCap kept dropping out. Did so 5 or 6 times. SoftCap wouldn’t align stars for live stack. Severe vignetting...