Quote:
Originally Posted by PRejto
Allan, that is certainly an interesting idea. I can think of 2 issues straight away.
1. When the shutter normally closes the image downloads. So, to use the camera shutter one would need to do a modification of the camera electronics. Probably the easiest way would be to have a separate shutter somewhere in the image train.
2. The total light time would vary, though perhaps only by a matter of seconds. I guess darks/flats would work OK, but the signal would vary...perhaps like thin clouds reduce values in some subs.
Peter
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Yes Peter,
1) Yes - the shutter in the camera could be modified - to have an external control or another shutter could be fitted.
2) If you wanted say a 300 second exposure & there was a bit of wind around you could set a 400 second exposure but download it when only 300 total seconds had expired.
That would give you up top to 100 seconds where the shutter could be closed.
It would be nice if it was all automatic - that's where the software writers like PHD could help.
Why isn't this done already?
I think it's such a good idea -
you could also have the shutter closed whenever the guide graph passed a pre-set limit.
cheers
Allan