PaulBa wrote:
Thanks lovitlots I think you have a valid point.
Although Im convinced they are dust spots which are in a different position, relative to the subject, in each frame. As stated above Zerene while aligning the subject will leave the spot in a series of positions across the stacked picture.
However, Ive just check my setup and, I must admit, that my alignment of camera to focusing rail left a little to be desired
.. :-((. I believe this would increased the movement of the subject across the frames leading to the extended series of dots post stacking.
As for their alignment, although not straight they do all have a similar pattern which could be due to the movement in my setup. The bug was on a door six foot from the ground so my tripod was fully extended.
I must admit that Im not an expert, not even an competent amateur, these are just my thoughts to be discussed or ignored as you feel fit.
One thing for sure is that Ive still got a lot to learn.
As a point of interest Ive attached a cropped pic of the dust on my sensor and a crop of the original stack. I think you can match six of the dust spots with lines on the stack..
Thanks lovitlots I think you have a valid point. b... (
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Dust on your sensor may have some effect on the alignment but I think the software, to some extent can filter that out. Why think it's your alignment is because the software creates little islands of in focus parts of a frame, aligns them and then stitches them all together in the final image. Your final has a line between the islands and makes me think that you have more than a little speck causing trouble. Nice thing about digital, you can try the shot more than once for free. Try to lower your tripod,add some weight to it to stabilize it and make sure your alignment is good from one end to the other. Use a cable or remote release if you have one and if you don't, use the self timer to fire the shutter so that you minimize any camera shake or movement.