Another mosaic of the Moon - 6 panes to get the whole thing done. Seeing was a little hazy but the detail seems to be there:
And full size:
Taken las night whilst trying out 10 min subs with mt ED120APO and Canon 1100D. this is the result of 20 x 10mins = 3 hrs 20 mins total exposure. Bias and flats included.
I did take this object last year with 5 min subs but this one is far deeper - easily to mag 17 or more. I have marked over 120 galaxies within the image.
As a bonus Comet 32P Comas Sola is dead centre of the frame. this is Mag 14.94.
I thought I'd try some 10 minute subs with my 1100D (I invariably use 5mins for DSO imaging) just to see what would happen.
I was expecting all sorts of problems but these did not materialise! The only issue I did have was some slightly egg shaped stars after about an hour of imaging - I can only assume this was due to the scope being in an almost vertical position and something somewhere moving! (I did check and there were no cables etc snagging). The PHD trace remained dead straight but the stars became elongated by a couple of pixels. That left me with an hour of useful subs.
So 6 x 10 mins with a Canon 1100D at ISO 800. ED 120 APO on an EQ6 guiding with an ST80 and QHY5/ EQMOD. Processed with flats and bias only in DSS and PS CS5:
Take a look below (18th Feb) for an image taken using 3 hrs of 5min subs…
Showing the phase. ED120 APO, ASI120MM mono, 2.5x Powermate, 2000/10000 frames stacked in AS2 and sharpened in R6. RGB image combined in PS. It is very rare to see any surface shadows on Venus and certainly no details! Click image for full size: