Thanks for the comments all.
I thought I would try and use my system to get some really faint stuff. in narrow band.
This is a single 32 min exposure of NGC2070 binned X2 it has been corrected for darks and flats.
16b tiff
https://www.flickr.com/photos/343863...n/photostream/
Unstretched as a 16b tiff
https://www.flickr.com/photos/343863...n/photostream/
Unfortunately they have just upgraded Bolton Street which goes past my place out front and they have put in more dreaded high pressure Sodium street lights.
I will collect more SMC data binned X2 and use this to make a HDR composite with the full resolution data. That way resolution is maintained.
Bert