Search found 44 matches

by mgutierrez
Thu May 20, 2021 12:59 pm
Forum: Image Processing Troubleshooting
Topic: Narrowbanding with an osc
Replies: 2
Views: 178

Re: Narrowbanding with an osc

Thanks for the reply, Ivo. Yes, I agree, but nowadays cannot afford a new-brand mono cam and all the components. I have to re-think it again. Thanks!
by mgutierrez
Wed May 19, 2021 11:11 pm
Forum: Image Processing Troubleshooting
Topic: Narrowbanding with an osc
Replies: 2
Views: 178

Narrowbanding with an osc

Hi all, Sorry if I'm not posting in the correct sub-forum. I've been thinking for a couple of months about upgrading my dslr and jump to a dedicated camera. First doubt is the eternal question about choosing mono or color cam. Cost and available imaging time are the main cons to choose a mono one, b...
by mgutierrez
Sat Apr 03, 2021 10:39 pm
Forum: Image Processing Troubleshooting
Topic: Fringe killer usage
Replies: 2
Views: 351

Fringe killer usage

Hi all,

I'm trying to remove chromatic aberration from some stars. Fringe killer works nice but leaves a grayish background color where I apply the filter:

before:
Selection_077.png
Selection_077.png (47.57 KiB) Viewed 351 times
after:
Selection_079.png
Selection_079.png (47.22 KiB) Viewed 351 times
any tips?

m
by mgutierrez
Sat Mar 13, 2021 6:20 pm
Forum: Image Processing Troubleshooting
Topic: Good flats?
Replies: 21
Views: 1934

Re: Good flats?

Well, actually my problem is that I don't know how to take flats with this filter. I was told that good flats should have an equilibrated histogram, quite centered. Without filter I managed to get that. But with the filter the channels are quite separated so I don't know how to center them in the hi...
by mgutierrez
Fri Mar 12, 2021 8:22 am
Forum: Image Processing Troubleshooting
Topic: Good flats?
Replies: 21
Views: 1934

Re: Good flats?

Hi guys,

I would like to take the opportunity and ask about how are you taking flats with l-enhance. Mine shows an histogram with the channels quite separated:
post-352016-0-19468500-1614198992_thumb.jpg
post-352016-0-19468500-1614198992_thumb.jpg (17.98 KiB) Viewed 703 times
is this normal?
by mgutierrez
Wed Mar 03, 2021 9:13 pm
Forum: Image Processing Troubleshooting
Topic: Flats with optolong l-enhance
Replies: 2
Views: 658

Flats with optolong l-enhance

Hi all, Since I see there are some users using this filter, I have the following question. I'm trying to get flat frames with an Optolong L-Enhance filter. Without the filter I get good quality flats, but with the filter the histogram shows the three color channels quite separated. I guess is normal...
by mgutierrez
Thu Feb 25, 2021 8:20 am
Forum: Image Processing Troubleshooting
Topic: OSC Optolong l-eNhance colour
Replies: 52
Views: 9211

Re: OSC Optolong l-eNhance colour

fmeireso wrote: Wed Feb 24, 2021 6:58 pm So i worked on the Rosetta..
congrats for the result! I also tried this object last week, with the same filter, but I like more your processing than mine:
NewComposite3_signed.jpg
NewComposite3_signed.jpg (361.76 KiB) Viewed 840 times
:obscene-drinkingcheers:
by mgutierrez
Tue Dec 08, 2020 2:47 pm
Forum: Image Processing Troubleshooting
Topic: Help with M42 + CLS filter
Replies: 7
Views: 1209

Re: Help with M42 + CLS filter

Hi, I would like to know and understand the logic behind composing in this way when using a narrowband filter (even if it does not apply to this case), cause to be honest I don't know why do I need to load the channels in this way, and why to set the luminance to that option A duo/tri/quad band fil...
by mgutierrez
Mon Dec 07, 2020 10:16 pm
Forum: General Discussion
Topic: About walking noise
Replies: 8
Views: 1117

Re: About walking noise

I think the term "defect" pixels is misleading. We should be aware of the amount of this issue. Let me try a simplified wrap-up: E.g. a typical DSLR will create data with 14-bit depth, i.e. the Least Significant Bit (LSB) would be 14. Lets assume we have a "defect" with the amount of 0.5 LSB (= bit...
by mgutierrez
Mon Dec 07, 2020 10:15 pm
Forum: General Discussion
Topic: About walking noise
Replies: 8
Views: 1117

Re: About walking noise

Thanks for the explanation, Ivo. That was more or less the idea I had. So, basically, the problem is due to a pixel(s) problem, similar to a classical hot pixel, but weaker, right? Correct! Does it happen very often in the sensor? It does, particularly when the real signal is faint. Also, that pixe...