Paul B. Jones http://www.astrobin.com/users/bunyon/
Emil author of AutoStakkert! 2.1 (check out the beta versions!). Webcam Astrophotography - Deepsky, ISS, Sun, Moon & Planetary Images,
Quote:Very nice image Paul! Still a couple of merging artifacts visible (the coarse cross), but not much you can do about that if the seeing isn't the same for each panel.Sorry if this gets old to anyone, or if I sound like a **** by repeating this, but I again like to point out some 8 vs more than 8-bit stuff. Not interested? Than skip the following: Even 8-bit images can capture both prominence and disk at that same time. Usually, 16-bit (or 12 or 10) doesn't add anything and you get the exact same quality with 8 vs. higher bits. ( Unless you use wrong camera settings: you didn't watch the histogram closely, no clipping and neutral gamma! OR the gain value was extremely low). If you can capture more than 8 bits with the same fps as 8-bits, and you have the disk space (or you just throw the recordings away or the money to buy it), then of course you CAN use more than 8-bit without problems.But to avoid people from spending money when it isn't necessary, or even getting worse results: for planetary and even h-alpha solar recordings (and it some cases even white light solar recordings at extremely low gain values), when using the correct camera settings, 8 bit recordings are 99% of the time just as good as 12-16-bit recordings. They capture the same information in both the dark and bright areas of the image. If imaging in more than 8 bits hurts your FPS, the final stack is usually actually WORSE than an 8-bit recording.
www.bajadarkskies.com 18" Starmaster dob (zambuto primary) 30" Starmaster dob (intermountain optics)
Quote:Valery, you should provide details. Now there is no way of telling if 1) Physics is wrong, 2) your camera is wrong,
However, can someone let me know what kinds of gains are typical on solar imaging? I have no idea how much is lost through the filter etc but am hoping that in solar imaging you are using 0db gain and a lower-than-max shutter. In which case there may be an argument that 16-bit imaging will gain you something.
Just a thought - I'm sure Emil has this figured out already
Quote:Now there is no way of telling if 1) Physics is wrong, 2) your camera is wrong, or 3) you missed the part where I told about camera settings.
Quote:...OR the gain value was extremely low
70mm F/7 achro (my mama's gift for my 12 birth day) ARIES 7" F/8 Fluorite APO doublet refractor, ARIES 10" F/14.6 MCT (c.o. 22%) C14 with carbon tube, cooling fans + Hyperstar 3. PGR Flea 3, 1.3Mpix mono.