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Discussion Starter · #5 ·
jsedlak said:
700mm. No wonder!!!!

Do the Canons pickup and multiply when using a converter? I didn't think Canon made a 700mm.

Yes, the focal length increases by the factor of the converter (1.4x and 2x). Shooting a 1dmarkII + 500L F4 IS + 1.4x converter.
 

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Discussion Starter · #8 ·
jsedlak said:
cool cool. these are sharp too! I think you just sold me on the converter. :D

Wait a second.....what lens you will be using the converter on??? Prime lens (fixed focal length) works well with the converter. With zoom lens, you will lose sharpness, contrast, AF speed, and over all image quality. Often not as much if the lighting is good.
 

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dag. We have the 100-400L that is good, but just doesn't cut it in some cases. Especially for the skiddish creatures like the groundhog that feeds on our bird seed.
 

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Discussion Starter · #10 ·
jsedlak said:
dag. We have the 100-400L that is good, but just doesn't cut it in some cases. Especially for the skiddish creatures like the groundhog that feeds on our bird seed.
In the extreme case, yeah, a converter would help but don't expect good result. Also, you will lose auto focus function at the longest focal length.
 
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