Thread: Dark circle on CCD images
View Single Post
  #5  
Old 18-07-2014, 02:03 PM
RickS's Avatar
RickS (Rick)
PI cult recruiter

RickS is offline 		 
Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
From the size of the shadow you can figure out approximately how far from the sensor the dust speck is: http://www.wilmslowastro.com/software/formulae.htm#Dust

Cheers,
Rick.
Reply With Quote