I just got a Nikon D7100 to replace my Nikon D90.   I also have a Nikon
D800, but often it is preferable to use a lighter DX format camera.

I also got a Nikkor 70-300 mm VR lens to use taking pictures of my
granddaughters playing soccer.  On the D7100, I get the equivalent of
450 mm on a full frame camera.

When I use Lens Correction in darktable, it initially shows the camera
and lens, but since the lensfun database doesn't seem to know about the
D7100, it doesn't do any correction.  If I specify the camera to be a
D7000, it allows me to choose my lens and it presumably does the right
correction.

So my first question:  Am I right in assuming that there are no
differences between the D7000 and D7100 relative to darktable's Lens
Correction?

My second question:  My 70-300 mm lens works for FX format, so I can use
it on my D800,  but the lensfun database for this lens refers to using
it in DX format.   I presume that means that I can't just use the D7000
Lens Correction for this lens on a D800.  Could I go far off if I did
that anyway?   Is there any chance of an entry for my lens on a D800
appearing any time soon?   Or, if I need it, should I do my own lens
calibration?
-- 
Leonard Evens [email protected]
Professor Emeritus, Department of Mathematics, Northwestern University
-- 
Leonard Evens [email protected]
Professor Emeritus, Department of Mathematics, Northwestern University


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