D7100 1.3 Crop Mode, how to activate?

Started Mar 27, 2013 | Discussions thread
SpenJam
Forum MemberPosts: 58
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Re: No change
In reply to Mako2011, Mar 28, 2013

Mako2011 wrote:

SpenJam wrote:

I have setup the AEL button to toggle between 1.3 crop mode and DX mode, but  after trying it out with 3 different lenses, do not see any change in focal length?  Does it only work with certain lenses?  Tried activating it from the shooting menu, same non-result, what am I doing wrong here.  Read the manual and it does not list any special lens requirements, please let me know, maybe I need some additional settings changed.  Thanks!  Jim

Real focal length does not change...only how much of what the sensor sees that is recorded changes. In DX mode the whole frame gets recorded. In 1.3 mode only the inner 70% gets recorded. Try this...take a picture in DX mode of a calendar on the wall filling the view finder. Now switch to 1.3 mode and take the same pic with the calendar filling the view finder again (ignore the crop grid in the viewfinder). Now compare the two pictures on your computer...the Saturdays and Sundays are missing in 1.3 mode

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My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)

I was under the impression that my 200mm lens would photograph the center crop area in the viewfinder and equate to appox a 300mm lens, each photo looks the same in my photo editing program, is the change in appearance really that insignificant?  I just photographed a clock dial and do not any difference in the photos at 300mm crop and DX mode, here they are (disregard flash blowout)

Essentiall the same at all focal lengths and if I shoot a landscape, looks to be no difference???

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