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next PZ lens test report: Canon EF 70-300mm f/4-5.6 USM IS
#1
[url="http://www.opticallimits.com/canon-eos/566-canon70300f456isapsc?start=1"]http://www.photozone...6isapsc[/url]



Still very decent on the EOS 50D albeit quite comparable to the 55-250mm IS.
#2
Thank you. Is the difference visible (compared to the 55-250 on the one hand and the 70-200 f4 IS on the other hand)?
#3
[quote name='Tiz' timestamp='1291654986' post='4788']

Thank you. Is the difference visible (compared to the 55-250 on the one hand and the 70-200 f4 IS on the other hand)?

[/quote]



Towards the 55-250 - not really except for vignetting.

Towards the 70-200 IS - yes.
#4
[quote name='Klaus' timestamp='1291656082' post='4790']

Towards the 55-250 - not really except for vignetting.

Towards the 70-200 IS - yes.

[/quote]



Thank you. Is it possible to generalize this by saying that differences of about 100 LW/PH are hardly visible outside the lab and differences of about 200 LW/PH are visible (but still not huge)?
#5
[quote name='Tiz' timestamp='1291663829' post='4792']

Thank you. Is it possible to generalize this by saying that differences of about 100 LW/PH are hardly visible outside the lab and differences of about 200 LW/PH are visible (but still not huge)?

[/quote]



It all depends. The subjective quality perceptions needs to take CAs into account.

Assuming the CAs are about equal I'd say that normal mortals will see a difference from 250 LW/PH onwards.
  


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