Search found 156 matches
- Sat Mar 27, 2021 6:35 am
- Forum: Tips and Tricks
- Topic: Exposure's Effect On Color Quality
- Replies: 18
- Views: 15620
Re: Exposure's Effect On Color Quality
Interesting discussion. There seem to be two parts to that CN article. Part 1 is calculating the sub length, with the associated factor of 4.38, and Part 2 is about the effects of quantization on extremely low signals. My math is a bit rusty, but some of Part 1 doesn't seem to make sense. In equatio...
- Sat Mar 27, 2021 3:32 am
- Forum: How do I?
- Topic: Best location for Histogram peak
- Replies: 2
- Views: 512
Re: Best location for Histogram peak
Its useful to know that there's no downside if part of the 16 bit histogram is in the light green section. My attempts to get it all (including the right trailing edge) into the dark green zone results in a very thin histogram. That needs a lot of stretching which in turn seems to introduce quite a ...
- Sat Mar 27, 2021 3:27 am
- Forum: How do I?
- Topic: Sensor analysis - with or without filter?
- Replies: 2
- Views: 478
- Fri Mar 26, 2021 11:53 am
- Forum: How do I?
- Topic: Best location for Histogram peak
- Replies: 2
- Views: 512
Best location for Histogram peak
Question regarding the usage of the smart histogram. I'm using RAW16. I presume the best location is for the left of the histogram to be just beyond the amber band in the top bar(so that Read noise is less than 10% of total), and the right to be well within the dark green band in the lower bar (so t...
- Fri Mar 26, 2021 11:39 am
- Forum: How do I?
- Topic: Sensor analysis - with or without filter?
- Replies: 2
- Views: 478
Sensor analysis - with or without filter?
Hi, I'm running the sensor analysis on ASi385MC. I normally use a UHC filter, and wondered if this would make a difference to the analysis results. So I ran it with and without the filter, at 8 as well as 16 bits. The results table has only very minor variations eg 3.01 vs 3.04 - basically no differ...
- Mon Mar 01, 2021 6:23 am
- Forum: Tutorials
- Topic: Picking the correct exposure for Deep Sky
- Replies: 78
- Views: 132781
Re: Picking the correct exposure for Deep Sky
Thank you very much for an excellent tutorial (along with your videos on this plus selecting the right gain). They helped greatly in my mount purchase decision. There are a couple of points I'd like to bounce off you. 1. The thermal noise has been removed from the equation early as it is considered ...