Ah yes, my M50/1.7 is a 200mm effective focal length. My Vivitar 24/2.0 is a 100mm effective, and my 100 is a 400 effective. I especially like my 80-200 which is a 320-800 effective. Your 50mm on your *ist is a 300mm efective.

Wow! Hey if we use 8x10 we can double them. Then my 80-200 is a 640 to 1600 zoom, and your 50 is a 600mm. Do you have any idea what a 640-1600/f2.8 zoom for an 8x10 would cost? I sure saved a bunch on that one.

Only, (frown) somehow my contacts don't look like they came from an 8x10.

--


William Robb wrote:


----- Original Message ----- From: "Rob Studdert"
Subject: Re: Camera shake (was The A-2XS and A 400/5.6)




On 1 Mar 2004 at 13:13, William Robb wrote:


I have never said anything about camera shake factors with the
smaller format, I just rail at the concept that a 50mm lens is

really


a75mm lens as soon as it gets stuck onto the istD

I think the problem here is that I (and I suspect many other

photogs) just care


about AOV and the common expression of AOV is via 35mm FL hence the

constant


referral back to this reference regardless of format.


I think, just to ensure absolute clarity, I will refer to all focal
lengths as they work on the 4x5 format, since that is as good a
reference standard as anything.
At least me, Rittenhouse and Hodgson will have a clue.
Don't know about the rest of you lot though.

William Robb




-- graywolf http://graywolfphoto.com

"You might as well accept people as they are,
you are not going to be able to change them anyway."




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