Astrophotography Basics #1 | The Bias Frame
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- เผยแพร่เมื่อ 28 ส.ค. 2024
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Probably the best explanation of bias frames I’ve seen. Thanks.
Great to hear!
Tim, as ever, very informative, clear and concise. I learn my from 10 minutes in your videos than and hour in some others!
Thanks Tim for creating this video-series! It will no doubt help many people out there!! Glad to have you back creating your impressive content & cool stuff that you teamed up with skillshare 😎👍
I watched your channel grow and grow: Well deserved, good job!
Very good explanation thank you Ive just subscribed to you channel. I'm new to this subject so learning and also preparing a workflow procedural sheet to help me along they way.
Hi Tim, welcome back to the channel. Great to see you again and grats on the skillshare sponsorship. Great video, can't wait for the next frame-types to come up.
Hi Tim
Brilliant information for me as I'm just starting out with astro photography. Thanks.
Excellent topic. Looking forward to the other in this calibration series
Glad you made mention of "Dark Flat" frames. It is my understanding that dedicated CMOS cameras do not need Bias calibration frames. Perhaps the answer is they need Dark Flat frames instead?
I like Sequator's approach to bias frames - it doesn't need them because it uses your dark frames instead, which already contain the readout noise.
Loved it mate. Waiting for the other videos.
Welcome back Tim!!!
Welcome back Tim.
I have an ASI294MC Pro and an ASI2600MC Pro, and that is also what I've heard is to use dark flats instead of bias frames. I am not very smart when it comes to comprehending why this is the case, so I look forward to the videos. I have much to learn about post processing.
Hallo Tim, Basics... Klasse!!! davon bitte mehr. Nur schade, dass Du deine Videos nicht in deutsch machst.
Great Video. When you cover Flat frames can you discuss exposure lengths for narrowband ie 5nm, 3nm. I dont see any videos discussing flat frames with respect to narrowband. Danke schoen!
What I dont like are 1) bias removes read noise. Lets sign as noise smthing random - stacking removes noise. Bias removes bias, it is just not flat. 2) bias removes smthing from light frames. If u use darks, darks remove dark current and bias as well. So u need bias if i) no darks available ii) if no flat-dark available iii) if u want to scale dark current. And surprisingly u add read noise with any calibration))) With respect.
Hi Tim. In my search for info on Astro photography, I found your video. I found it very interesting, but I wonder: is it possible to take bias frames once for all ISO values and still use them in, say, 5 years from now?
I love you
very good tutorial, i am trying to decide how to proceed in astrophotography. i would have travel to get to a dark place. my home is very light polluted. i own a sony a7r3, a televue 85 and a gitzu carbon tripod and ballhead with arc swiss head. how do i get my feet wet in this hobby.
Hi Tim, how should I recorder Bias Frames with an Astrocam?
E.g. if I use the software APT, I have to type in the Shutter speed manualy.
APT kennt die meisten Kameras. Wenn du einen Bias Plan einstellst, sollte die Box für Belichtungszeit nicht verügbar sein. falls doch, schau in die EInstellungen, da gibt es einen Haken für "Advanced Bias/Flat Plans", diesen aus machen
Great informative video! Just curious, does temperature matter in dark flats?
It does not, they are way too short to contain enough dark noise
@@AstroAddict Thanks! Even if your flats are like 4 seconds though?
Comparing the amount of signal that is collected, like 50 to 80 % of the full range, the noise will amount to nothing
Would shooting in fast continuous or slow continuous instead of single change the noise in the bias frame on a DSLR
No, I tried that out, makes no difference
Maybe a stupid question, but why not use black and/or white images as bias frames?
Think you missed the reason to take them in the first place.. watch Tim's video again