300mm + 1.7x TC = 700mm?

kylehess10 · May 10, 2011

I have a 300mm f/2.8 AF-S Nikkor lens with a TC-17E II teleconverter (shooting with a D7000), which should make it a 510mm f/4.8 lens, but every photo I take with the combination come up as a 700mm lens in the EXIF info. What's the reason for that?

Exif | Jaime Garcia | Flickr - Photo Sharing!

Big Mike · May 10, 2011

It may be trying to incorporate the 1.5X crop factor.
But that only affects your FOV, not your focal length...so if that's what it's doing...I'd think something's wrong.

tirediron · May 10, 2011

Nikon APS-C bodies do in fact "account" for the 1.5x crop factor in their EXIF data.

480sparky · May 10, 2011

Then I must have a non-conformist D7000.

pdq5oh · May 10, 2011

Mine shows the focal length as sparky's does.

tirediron · May 10, 2011

Interesting, both my old D70 and my D300 both show the "multiplied" FL. I wonder if it's something Nikon's changed, or if there's a setting that can be altered? Anyone?

Big Mike · May 11, 2011

That's weird...because the focal length doesn't change because of the crop factor...only the field of view.

I could see them using the multiplied focal length for the teleconverter though.

ClickAddict · May 11, 2011

I think I remember reading somwhere that certain software will factor in the crop factor, some don't. So perhaps your camera sent one value and the software you used to save/edit your photo modified the EXIF? Just a thought. Could be way off but if you can't find the answer with the camera check the info on your software.