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Originally Posted by iceman
lol what a co-incidence Robert.
I went out last night too, in horrible seeing and captured this image of the same crater. I had a longer focal length, and so at 30fps I needed a longer shutter (I used 1/30s). Gain was about 850, gamma was 12.
I imaged through the red astronomik filter.
Interesting to see the difference in focal lengths, and also the orientation of the crater. Mine was captured at about 7:30pm as the moon was just about to head behind the roof of the house. Horrible, horrible seeing! Captured 1 jupiter avi and deleted it almost as quickly  |
little did that crater know it would be the subject of such interest last night... mine was taken an hour earlier at ~6.30pm.
seeing was very bad, but I used the opportunity to compare image scales using my different barlows/powermates with the flip mirror and filter wheel in place as extensions. I've got a big gap in the mid-range! The 2.5 powermate gives 2.2x, the 4x powermate gives 4.4x - I had thought the 3x Orion barlow would fall in the middle, but no it spits out 5x....
Anyway, to fill the gap I've just ordered a 2x Vixen DX barlow which I should be able to use to get ~3.5x.
cheers,