Quote:
Originally Posted by Mickoid
These did have Dark's and flats applied. Interesting about the mirror lock up. I would not have thought the short mirror/shutter slap would make much of a difference being so quick and gentle. I'll have to try that and compare it to one without. The shape of the stars on the subs I discarded didn't look like it was caused by vibration but I'll try the mirror lock up function and see what difference it makes. Thanks Andrew.
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Good to hear that you applied Darks and Flats, well done.
With Mirror Lock up, you may not notice the effects of Mirror Slap in some situations but it is a good idea to use it anyway.
Not that that was the cause of the ones you discarded per se' but it's always a good idea to use it, I always do because you'd be surprised at the amount of vibration that's going on in the camera from 'Mirror Slap'.
Also it's a good idea to leave the camera idol for a minute or two after taking a few long exposures because this allows the sensor to cool down thus reducing noise.
Also along that same vein, try not to use or leave the screen on too long as well, this too will reduce heat buildup inside the camera.
These are just little things you can do to help reduce noise and blur in your astro imaging, every little bit helps.
RB
Mirror Lock Up for Sharper Long Exposure Photographs:
Inside a Camera at 10,000fps - The Slow Mo Guys: