red, blue and green dots on macro shot with long exposure

Started 1 month ago | Questions thread
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donedo New Member • Posts: 6
red, blue and green dots on macro shot with long exposure


I am just asking to make sure my camera is working correctly.

So I took test shots (using focus-bkt) of a dead fly with poor lighting and therefore long exposure (approx. 4 seconds each shot) which I turned into a helicon stack (140 shots in total).

Now you can see those dotted red, blue and green lines all over the image (especially on the borders - you may have to zoom in). Is this normal behaviour of my camera? The only explanation I have is those dots appeared due to sensor heating up during focus bkt since taking all 140 shots took a while.

Can someone confirm my theory - or are those dots caused by something else.

If I am correct - how do you deal with those dots? Avoid long exposure with a lot of light?

Kenko 16+10 - 60mm oly - raynox 250

 donedo's gear list:donedo's gear list
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