lefty7283

joined 2 years ago
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[–] lefty7283@lemmy.world 1 points 6 days ago (1 children)

Siril should be able to. I'll admit I've never used it myself (I use pixinsight for all my processing), but I know it's a fairly popular free processing option. Also you'll definitely want to try and take more dark frames than just one. Generally you'll stack the darks together, and then subtract that from your lights (this should remove most of the noise thats not the fixed hot pixels)

[–] lefty7283@lemmy.world 3 points 6 days ago (3 children)

That seems like a fairly typical amount to me (certainly a lot less than my old canon 600d)

[–] lefty7283@lemmy.world 3 points 6 days ago (5 children)

Hot pixels! Best way to deal with them is taking dark frames: a bunch of exposures with the exact same settings as your light/main frames, but with the lens cap on so it just captures the noise. Also important that your camera is roughly the same temperature as when you took the light frames, since this type of noise is very temperature dependent. Once you have your dark frames, you can stack them to make a master dark, and use this to subtract the hot pixels from your lights using a deep sky stacking program of your choice.

Side note: for most consumer cameras, using a higher ISO will actually lower noise, at the cost of dynamic range

[–] lefty7283@lemmy.world 17 points 1 week ago (2 children)

☝️presenting to the emergency room

[–] lefty7283@lemmy.world 1 points 2 weeks ago

The STOP-BANG questionnaire is good to get at least some idea of if you have sleep apnea or not. Def talk to your doctor about it! Untreated sleep apnea can lead to some pretty bad health problems later on (a-fib, coronary disease, stokes, hypertension) in addition to just being tired as shit all the time

[–] lefty7283@lemmy.world 52 points 2 weeks ago (13 children)

There’s a Gemini logo in the bottom corner

[–] lefty7283@lemmy.world 2 points 2 weeks ago

Hi OP. This community is for OC images of space taken by amateurs.

[–] lefty7283@lemmy.world 2 points 1 month ago

The trick is to be in a group just for adults. I’ve been active in the Ancients of VRChat for years and there’s always a couple dozen events a week

[–] lefty7283@lemmy.world 1 points 1 month ago

Hi OP, this community is primarily for amateur photos of space that you’ve taken yourself.

[–] lefty7283@lemmy.world 6 points 1 month ago

It sure is! The monochrome sensors are also great for narrowband imaging, where the filters let through one specific wavelength of light (like hydrogen alpha) which lets you do false color imaging.

IR is basically the same. Here’s the page on JWST’s filters. No clue about xray scopes, but IIRC they don’t use any kind of traditional CMOS or CCD sensor.

[–] lefty7283@lemmy.world 7 points 1 month ago (2 children)

At least for astronomy, you just have one sensor (they’re all CMOS nowadays) and rotate out the RGB filters in front of it.

[–] lefty7283@lemmy.world 2 points 1 month ago

Few hundred pixels is definitely enough, and kinda overkill (mine goes a few dozen). I think the frequency of the dithers is probably the main thing that could help with the noise

 

Honestly impressed with the production value on this. Looking forward to more episodes!

 
 
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submitted 1 month ago* (last edited 1 month ago) by lefty7283@lemmy.world to c/astrophotography@lemmy.world
 
 
 
 
 
 
 
 
 
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