I'm a noob and looking to learn from the beast on Astrobin.
No posts in OSC?
Just to kick things off, especially for DSLR users I think it's important to find out how to squeeze out as much performance as possible out of these cameras to emulate astro camera capability. With the right technique and knowledge surprising results can be obtained from the humble DSLR.
I personally now prefer Drizzling during aquisition, and in comparison tests have found it to be equal or better than Dark frame and bias subtraction. Despite losing some imaging time while drizzling between images I just have to stack the aquired images and do without spending any time sorting out darks and dealing with fluctuating temperatures DSLR's are subject to.
Any comments or questions?
DSO Scope….Dan
I personally now prefer Drizzling during aquisition, and in comparison tests have found it to be equal or better than Dark frame and bias subtraction. Despite losing some imaging time while drizzling between images I just have to stack the aquired images and do without spending any time sorting out darks and dealing with fluctuating temperatures DSLR's are subject to.
Any comments or questions?
DSO Scope….Dan
Hi Dan,
you mean dithering and not drizzling, right? And yes, I also made very good experiences with dithering. In combination with BIAS and Flat calibration frames it‘s very useful with a DSLR. Only in hot summer nights I got some additional quality by adding Darkframes. Give it a try but be aware, that the results also depend on the used camera model.
Frank
you mean dithering and not drizzling, right? And yes, I also made very good experiences with dithering. In combination with BIAS and Flat calibration frames it‘s very useful with a DSLR. Only in hot summer nights I got some additional quality by adding Darkframes. Give it a try but be aware, that the results also depend on the used camera model.
Frank
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Oh yes, dithering while imaging is what I was talking about. Now that is a thought. In frame and focus movie mode I get temperatures up to 40c on the Canon sensor. I usually end up discarding the first 4 images due to very bad color noise until I reach sub 25c images in Summer time imaging. Additional flats/Bias/Darks ontop of dithered images is worth a shot especially for those "warm" images…….
Dan
Dan
Ron Kramer:
I'm a noob and looking to learn from the beast on Astrobin.
From the "beast?" Or from the "best?" <grin>
We just might all be "beasties" in one way or another.
I learn from others by noting their equipment used and camera settings. Each type of object has specific "best practices" involving sensor type, exposure, focal length, the number and type of subs, and whether or not filters make a significant difference. But in the end, the post-processing is where what might appear to be a not-so-good image can be turned into something magical.
I suspect that for some people using OSC, just getting a decent image in a single shot is an accomplishment. Hey! There's a group for that!
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