Inspired by the latest flurry of long a deep images. Thought since focus and tracking etc were all OK would go for a series of long exposures to see how deep I could go. Anything longer than ten minutes on this target under these conditions would saturate the sensor and wash out highlights. I guess short of using masking this is as good as it gets with this setup.
The only real improvement now is the same under dark skies without the LPR filter. This would markedly improve the blue response of the system.
Details
Canon 5DH, Canon 300mm F2.8L at F2.8, Hutech LPR filter, 6X10min at an ISO of 200, in camera noise reduction on. Processed with flats in ImagesPlus stacked with Registar and adjusted levels and curves in PS after digital development in IP. Also a bit of R&L 5x5 for ten cycles.
3.2MB
http://members.optusnet.com.au/~avan...LAG&TRIF_L.jpg
Bert