The \'extra credit\' optional set 2:
(All shots Zeiss 100 MP & Canon 100 Macro, all at f/2.8)
A = Cz
B = ZC
C = CZ
A summary of the results:
Most of the above is pretty self-explanatory, except perhaps for balance. Balance is a sum of the scores but with a miss being valued as -1. So a random result would yeild a balance of 0 while inverted results (thinking all Canons are Zeiss for instance) would give -1 and getting all right would give 1.
In graph form:
So the final result for Set 1 is 88% correct identifications. Pair B was apparently the most easy to classify (92% correct) while pair E (83% correct) was the most difficult. The results for the optional set 2 basically show that the guesses were random.
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OK, a quick walkthrough on how to identify A-E. The images are just crops of the same images that were posted.
A)
Global contrast and local contrast is much higher with the Zeiss. Look at the tracks in the snow for instance.
B) Zeiss = Higher local contrast:
C) Zeiss 21, first we have the tell-tale vignetting. At any aperture the 21 will have more vignetting than any other 21 mm lens:
The \'extra credit\' optional set 2:
(All shots Zeiss 100 MP & Canon 100 Macro, all at f/2.8)
A = Cz
B = ZC
C = CZ
A summary of the results:
Most of the above is pretty self-explanatory, except perhaps for balance. Balance is a sum of the scores but with a miss being valued as -1. So a random result would yeild a balance of 0 while inverted results (thinking all Canons are Zeiss for instance) would give -1 and getting all right would give 1.
In graph form:
So the final result for Set 1 is 88% correct identifications. Pair B was apparently the most easy to classify (92% correct) while pair E (83% correct) was the most difficult. The results for the optional set 2 basically show that the guesses were random.
I\'ll write something up and go through image by image showing how to identify A-E. As for F-H, I\'m at a loss to see a real difference so I won\'t try.
Feb 19, 2011 at 04:20 AM
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