Sorry but the image was NOT taken with a Vixen but with his homemade astrograph. Martin does have a Vixen but uses the other scope for astrophotography due to its fast focal ratio (see below).
Image is mosaic of two APS-C fileds oriented vertically. Taken with homemade N185/610 corrected with Televue Paracorr. Guided with Borg 77ED and TVGuider, EQ6 mount used. Total exposure time was 205 minutes (10x10min x 2 fields and 5x1min for core. Gain 53, Offset 110.
Allan
Quote:
Originally Posted by ozstockman
I am looking at these two OTAs too. As far as I know VC200L has a great comma free flat field while VCM200L doesn't. So I think VC200L would be much better choice for astrophotography.
Here is a page where they are compared
http://www.astronomie.be/Tranquility...vc200lpage.htm
The bad thing about these OTAs is that they have a big fat spider and stars dont look better because of this. Besides from this VC200L is reported to be a great imaging scope.
Check this image of M31 that was taken with VC200L and QHY8.
Also I could not find VC200L locally. Instead there is VC200L DG model available. Unfortunately there is nothing available to tell you what the difference between standard VC200L and the one with DG letters.
cheers,
Mike |