On my system the camera and correct lens is found by default .... which
is what I want!
David
On 2019-02-23 9:12 a.m., Sturm Flut wrote:
Hi,
Am 23.02.19 um 16:34 schrieb Florian W:
Thanks for your answers guys.
Simon, I'm curious to know why to you it's not the best idea ?
(oversimplifying it a bit)
Full-frame lenses are designed to deliver their full sharpness across
the whole full-frame image circle. If I put a full-frame lens on my
APS-C D7100, I am basically expecting it to deliver 24 megapixels within
the smaller APS-C image circle the sensor is cropping out. That means I
expect the lens to deliver about 24*2,25 = 54 megapixels over the whole
full-frame image circle. Which not that many standard lenses will do.
If put my standard 24-70/2.8 on a Nikon D850 and (let's say) it only
delivers 40 megapixels of actual resolution instead of the ~46 the
sensor wants, that's not going to be a catastrophe. If I put it on a
camera with a lower resolution sensor, e.g. the 24 megapixel sensor in
the D750, there is zero problem. But if I put the same lens on the
D7100, the cropped area will only get around 40 / 2,25 = 17 megapixels.
That's suddenly 30% less than what the sensor needs. And not every lens
will even deliver these 40 megapixels. Good APS-C and especially
Micro-Four-Thirds lenses are expensive and hard to make because they
have to be very sharp within the smaller image circle.
Prime lenses are usually sharper to begin with, so with your 50/1.8 and
28/2.8 it might not be that much of an issue. But I can clearly see the
problem with my 24-70/2.8, and especially with the good old 70-300/4.5-5.6.
cheers,
Simon
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