Search found 23 matches

by bellavia
Tue Aug 14, 2018 4:36 pm
Forum: Cameras
Topic: Any fix for amp glow ASI183MC
Replies: 17
Views: 6387

Re: Any fix for amp glow ASI183MC

Hi again, This is a link to my light (24 X Ha and 24 X OIII) and dark (41X) frames, all 300 seconds long, same gain, offset and temperature (-15C).: https://drive.google.com/open?id=1K49uW5uw3bs3155E_FwkrE8TJ_90xIks But except for perhaps one bright line, I am now thinking that the dark frames did c...
by bellavia
Wed Aug 08, 2018 12:06 pm
Forum: Cameras
Topic: Any fix for amp glow ASI183MC
Replies: 17
Views: 6387

Re: Any fix for amp glow ASI183MC

I too cannot get rid of all the amp glow, using a large stack of dark frames that were taken at identical gain, offset, exposure and temperature. This is a serious issue, that needs to be resolved. It is true for both my 183MM Pro and 183MC Pro. My most recent experience with non-removable amp glow ...
by bellavia
Sat Aug 04, 2018 3:31 pm
Forum: Cameras
Topic: FITS header does not have offset information
Replies: 1
Views: 956

FITS header does not have offset information

Hi, I have two ZWO ASI 183 cameras. The MM Pro and the MC Pro. They are amazing. (well, except for the amp glow, but that is another topic). The issue I am currently having is that the offset used in any image is not shown in the FITS header. This is important to me, as I am trying to maximize the d...
by bellavia
Mon May 21, 2018 9:21 pm
Forum: Accessories
Topic: A 16.5mm T2-spacer would be nice
Replies: 3
Views: 1433

Re: A 16.5mm T2-spacer would be nice

Oh! My mistake!

My two ZWO cameras* also came with a "zero-length" M48-to-T2 thread adapter. that is, it does not add to the length of the 16.5mm spacer.

So the supplied 16.mm spacer now works perfectly.

*I have 4 ZWO camera so far. I may buy two more.

Thank you ZWO!

Steve
by bellavia
Mon May 21, 2018 6:36 pm
Forum: Accessories
Topic: A 16.5mm T2-spacer would be nice
Replies: 3
Views: 1433

A 16.5mm T2-spacer would be nice

Hi, It would be great if ZWO could provide a 16.5 mm length T2 (M42x0.75) spacer, with male threads on one side and female on the other. Then, for most reducer-correctors, which have been designed for 55mm back-focus, using a ZWO ASI 183C or ASI 1600, etc,, that have the 6.5mm setback. one could get...
by bellavia
Mon May 14, 2018 2:20 pm
Forum: Cameras
Topic: UV-IR cut filter
Replies: 3
Views: 956

Re: UV-IR cut filter

No, They both use AR coated protective window. Protective window won't cause halos. So the full spectrum of light is allowed in, correct? (Similar to the ASI 224). If true, this is good news, as a cut filter (or semi-apo filter) will produce sharper stars with less halos, using my 2-element flourit...
by bellavia
Sat May 12, 2018 8:07 pm
Forum: Cameras
Topic: UV-IR cut filter
Replies: 3
Views: 956

UV-IR cut filter

Hi,
Does the 183MC and/or the 183MM have a UV-IR cut filter?
I own both (cooled, pro models) and want to know if this might be a reason I am getting halos around stars?
I am also not getting much color with the color version. Perhaps it is getting washed out in UV and IR?
Thanks!
Steve
by bellavia
Tue Dec 05, 2017 1:26 am
Forum: Cameras
Topic: Bayer Matrix for ZWO ASI224MC
Replies: 10
Views: 13783

Re: Bayer Matrix for ZWO ASI224MC

white balance is always need to adjust and different software use different way that's good news there is some improvement I finally got my color card, and the latest settings to get better colors are extremely simple (actually embarrassing, considering what I had in my last post, as it is just the...
by bellavia
Thu Nov 30, 2017 6:41 pm
Forum: Cameras
Topic: Bayer Matrix for ZWO ASI224MC
Replies: 10
Views: 13783

Re: Bayer Matrix for ZWO ASI224MC

this is because there is no IR-CUT filter you can add one IR-CUT filter so the final image is not so red But the image is NOT too RED. it is too GREEN, which is the opposite of RED. I think there is something wrong with the method the FITS header is being written OR the matrix is NOT R-G-G-B. I was...
by bellavia
Wed Nov 29, 2017 1:55 pm
Forum: Cameras
Topic: Bayer Matrix for ZWO ASI224MC
Replies: 10
Views: 13783

Re: Bayer Matrix for ZWO ASI224MC

this is because there is no IR-CUT filter you can add one IR-CUT filter so the final image is not so red But the image is NOT too RED. it is too GREEN, which is the opposite of RED. I think there is something wrong with the method the FITS header is being written OR the matrix is NOT R-G-G-B. I was...