On 10/25/2015 10:59 AM, John wrote:
On 10/24/2015 1:03 PM, John Francis wrote:
On Sat, Oct 24, 2015 at 11:10:12AM -0500, Darren Addy wrote:
Has anybody commented on the "crop" setting on the top right center
dial?
I'm guessing that this is a way to keep DA lenses relevant on the
Full Frame.
I'd have thought that the camera would know when a crop-factor lens
was mounted;
all the DA lenses have the lens ID chip to identify themselves to the
camera.
So what will happen when you mount a DA lens? will there be some way
for the
viewfinder to show a magnified view of just the central portion of
the field?
With Photoshop & all that, some DA lenses might not vignette too badly,
so maybe you wouldn't want it to automatically switch to crop mode when
you mount the lens. Looks like the switch would allow the user to decide
when to use crop mode.
It's not the vignetting that would be the problem. Though with shorter
focal length lenses there may be no image at all in the sides and
corners of the frame.
The big problem is that even if the basic design of the lens, the 40mm
f2.8 is an example, was originally for 35mm, the design has probably
been tweaked to improve the center APS-C part of the image circle,
probably with little thought to the effects outside that circle.
I mean really, I read raves about how sharp the 40mm f2.8 in it's
various DA iterations, which since I've seen results from the film
version on both digital and film, close up, I have to assume is either
because people are stupid, or the lens design has been improved to
increase center sharpness. There's nothing wrong with the M version,
it's just not the sharpest lens I've ever used, until it's stopped down
quite a bit.
--
I don't want to achieve immortality through my work; I want to achieve
immortality through not dying.
-- Woody Allen
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