Here is my pic from last night.
Taken with 50mm f1.4 lens at ISO 800 exposure time 2 secs.
35 frames + 1 darkframe were taken and stacked using DeepSkyStacker set to select the best 80%. During that stack I noted the best 10 frames ( the program gives points to each image ), copied each 4 times and stacked that lot. The stack was then copied 16 times and re-stacked. The result from that stack, was copied a further 16 times and stacked again. Each stacking operation took the computer 1 1/2 hours.
I have not tried taking the single best frame, multi copying that and stacking to see if it works.
From these pics I see I really need the exposure down to 1 sec as there is still some star trailing. On a wide angle ie 18mm you can probably get away with 15 secs exposure without an equitorial mount. For my 200 f2.8 to get in closer, I may have a problem as the X does not like ISO higher than 800. Hopefully the darkframe is a method of noise reduction, so I may be OK, as no NR was used on these images.
Pic 1 is the full frame shot.
Pic 2 a crop of pic 1
Pic 3 a 100% crop from a 4 sec exposure stack of 10 frames to show star trail over that time.
Don
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