10 - 10 minute exposures at 800 ISO on May 24, 2009. SQM reading was 20.8! This one was made with a Televue Paracorr at f/4.8.
It looks a lot bigger than with the original corrector, since EFL has changed from 570mm to 955mm. Compare with the image below.
Click in the image for a full size version. Modified Canon 40D, and a 20cm (8") ASA Astrograph with Paracorr to work at f/4.8.
23 x 5 minute exposures at 800 ISO on April 7, 2007. The bottom edge is due to a shift between two series of exposures due to problems with the ST4.
I had to throw away 8 exposures due to bad autoguiding :-( This image was made with a modified Canon 350D, and a 20-cm (8") f/2.75 ASA Astrograph.
Full size crop
An attempt to find the limiting magnitude for this image, a stretch on the grayscale version to see the faintest details, it seems I got to about mv20.
