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axl · 06-11-2009, 03:51 PM - **1 Like**

jsut a couple of quick questions.
a) putting 645 format lens on APS-C DSLR how would the FOV compare?
say 200mm FF lens on APS-C generates 300mm FOV
200mm 645 lens mounted on DSLR would generate FOV equal to ....?

b) are there good "A" adapters from 645 to K?

TIA
Peter

Last edited by axl; 06-11-2009 at 04:41 PM.

kristoffon · 06-11-2009, 06:02 PM

The focal lenght doesn't change. A 200mm MF lens will give the the same FOV you'd get from an APS-C 200mm lens.

axl · 06-11-2009, 11:59 PM - **1 Like**

ok get it...
sorry for silly question. It was too late in the night when I was writing it...
So 200mm 645 lens on APS-C will give me roughly 300mm equivalent on FF, right?

BR
Peter

06-11-2009, 03:51 PM - 1 Like	#1
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183	645 lenses on APS-C jsut a couple of quick questions. a) putting 645 format lens on APS-C DSLR how would the FOV compare? say 200mm FF lens on APS-C generates 300mm FOV 200mm 645 lens mounted on DSLR would generate FOV equal to ....? b) are there good "A" adapters from 645 to K? TIA Peter Last edited by axl; 06-11-2009 at 04:41 PM.

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06-11-2009, 06:02 PM	#2
kristoffon Veteran Member Join Date: Aug 2008 Location: Brazil Posts: 532	The focal lenght doesn't change. A 200mm MF lens will give the the same FOV you'd get from an APS-C 200mm lens.

06-11-2009, 11:59 PM - 1 Like	#3
axl Veteran Member Join Date: Mar 2007 Location: Nove Zamky, Slovakia Photos: Gallery \| Albums Posts: 7,183 Original Poster	ok get it... sorry for silly question. It was too late in the night when I was writing it... So 200mm 645 lens on APS-C will give me roughly 300mm equivalent on FF, right? BR Peter

645 lenses on APS-C

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