Quote:
Originally Posted by multiweb
Great colors. I don't understand why you don't do flats or darks. Darks I never did with my QHY8 that wasn't temperature regulated but for sure flats are important to get rid of dust motes and uneven illumination.  |
Quote:
Originally Posted by SkyViking
Hi Mike, I didn't notice noise in particular and your images with the new cam have all been great, so the following is purely from a theoretical point of view:
Why would darks introduce noise (unless you didn't have enough dark frames)?
And I'm wondering about flats too, because regardless of the chip you'll always have at least a degree of natural vignetting, due to the light rays striking the outer areas of the chip at an angle (pixel sensitivity depends on the angle of the incoming light). There will be dust doughnuts too, at least eventually.
Once you'ce created a dark/flat library there should be no extra effort required in applying this step to all your data. The calibration can be automatically applied in software like Maxim, so just thinking why wouldn't you always calibrate your data and squeeze the most from your camera?
So, not saying that your images need any of the above, but ideally I guess we'd all love to get the most from our equipment.  |
I do agree about the flats but not the darks actually as I use dithering. There are indeed sensitivity variations across even this lovely Sony chip and yes probably some very slight optical brightness variations that flats might address but the flats and flat darks will add noise. Luckily I have no dust motes though, even under hard heavy stretch so at the moment at least flats are not required for these
In the end I think your first sentence there says it all Rolf
I may of course buckle under all the pressure to conform...
Mike