View Single Post
  #14  
Old 19-02-2008, 07:53 PM
Peter Ward's Avatar
Peter Ward
Galaxy hitchhiking guide

Peter Ward is offline
 
Join Date: Dec 2007
Location: The Shire
Posts: 8,470
Gee, Paul your numbers are a bit out Try about $A8800 (STL) and $A3400 (5D body...where can you buy a 5D for $1500 ?? I'll buy two )

But, yes, I agree, the STL11k will cost a whole lot more than a 5D, but that wasn't the point....I could do the same test with a ST2000xm and despite less acreage in the ST, the QE/Noise/Sensitivity would have been similar to the STL at about half the price.

I suppose if there was a point to my comparing the two, was to discover: QE really matters.

For example, with a Marconi Back illuminated chip you loose just 5 or 6 H-Alpha photons out of a hundred, with a bog standard DSLR you loose about 85 of them.

It's pretty brain dead math, with all other aspects being equal, to see one detector will have a serious advantage over another.

Cheers
Peter


Quote:
Originally Posted by Zuts View Post
Hi Peter,

If you are trying to tell us that an 11,000 AUD camera cooled to -15 degrees C takes a better picture than a 1,500 AUD DSLR then I for one have no argument with you.

l
Reply With Quote