More questiona about the a77 and a99

Started Apr 29, 2013 | Discussions thread
JerryCurtis
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Re: When is f/2.8 not f/2.8?
In reply to MediaArchivist, Apr 29, 2013

Thanks. Makes sense. I must remember to test this one day, by shooting the same scene with, say my 50 1.7 (6 elements) and my 70-400G (18 elements) in manual exposure mode to see if there's a noticable difference in exposure.

I wonder if the better lenses compensate - or partially so - by having larger front elements to catch more light? In any case, if we want zoom telephotos, we don't have a lot of choice except to buy the better ones with the best coatings, etc.

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*Jerry*
Sony V1, H5, A350 and A77... Still learning...
'The camera is an instrument that teaches people how to see without a camera.'
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Sony Cyber-shot DSC-V1 Sony Cyber-shot DSC-H5 Sony Alpha DSLR-A350 Sony SLT-A77 Sigma 10-20mm F4-5.6 EX DC HSM +9 more
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