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Old 20-01-2019, 15:03   #2
Taf
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Re: The photography thread

55mm is very short for telescopic photos, although high pixel levels on many cameras would allow you to crop a lot of the sky out.

I used a 600mm lens with high ISO / ASA speed film for lunar shots, on a very stable tripod.

Learning how to control aperture and speed is not difficult once you understand the basics.

Basically a high speed with a large aperture is the same exposure as a slow speed with a small aperture (they act on a comparative scale, so one step up in speed means you increase the aperture size by one step, one step down in speed means you decrease the aperture by one step). The difference is that small apertures produce large depths of field, large apertures produce tight depths of field. And high speeds stop motion, whilst slow speeds will show blurred motion.

---------- Post added at 14:03 ---------- Previous post was at 13:58 ----------

And don't forget that the moon is moving, and it moves a lot faster than most realise. So a slow speed will not produce totally crisp pictures unless you are using a tracking mount or goto mount.
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