Saturday, March 15, 2008

20080315 Borg 45ED II Moon

Sky improves, I mean the transparency got pretty nice at around 7/10, seeing still rather bad like 2-3/10.

Telescope: Borg 45ED II
Barlows: Tele Vue 3x
Camera: DMK 31AF03.AS
Exposure is 1/15s and gain is like ~450.

This is a mosaic of the terminator, please click for full size.

Then I took off the barlows, and did a full disc shot, similar setup with my day time solar imaging setup, just without the H-alpha filters.

Finally, I had a look with my Japanese Widescan Type III, the moon is very sharp and contrasty without any color error around the lunar disc, I would say it's very close, if not a real APO despite it's just an ED doublet. Actually, a small objective like this at f/7+ is not hard to be a real APO.

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