Quote:
Originally Posted by Merlin66
Daniel,
I think you've cropped too tightly around the spectral image. It's very noisy.
Ideally the crop should be 40-60 pixel high.
This then allows you to use the background removal function to improve the SNR.
I'll have a better look later, but I think your calibration is out.
Which camera are you using?
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Noisy? Yeh, I tried stacking 5 subs in DSS but it could detect enough stars despite lowering the threshold and it detecting 65 stars.
Can post the raw frames (cropped larger) though it sounds like I should reshoot this first.
Was a quick setup. Using my canon 50d, 100mm macro and a dodgy home made card to hold the star analyser I my cokin filter holder. Yet to use my telescope.