New Pentax 70-200mm F2.8

Started Oct 5, 2012 | Discussions thread
jeanphilippe Goube Senior Member • Posts: 1,801
Re: Looks APS-C lens to me

il_alexk wrote:

From the photo-rumors:

"One more thing – this lens is “almost” full frame with image height of 21.64mm (full frame image height is 23.9-24.3)"

If this is true, the extra image size is likely to be used for the SR and horizon correction functions by APS-C cameras and will not fit the FF DSLR if Pentax decides to make one.

-- hide signature --


Wrong; the misunderstanding is that the word image height was used by photorumors instead of image circle (radius).

The image circle for a FF lens is sqrt(12*12+18*18) = 21.633 precisely


-- hide signature --


 jeanphilippe Goube's gear list:jeanphilippe Goube's gear list
Nikon AF-S Nikkor 800mm f/5.6E FL ED VR Nikon AF-S Nikkor 400mm f/2.8E FL ED VR Pentax Q Nikon D500 Nikon D850 +10 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow