On 7/7/2016 5:28 AM, Zos Xavius wrote:
I bet its like the 60-250 and there is just a baffle inside to block
light for aps-c.
That is typical behavior for lenses in general. Close focusing moves the
glass farther away from the sensor, and this increases the size of the
image circle.
Anyone who has used a large format camera will be familiar with this.
bill
On Wed, Jul 6, 2016 at 6:24 PM, Larry Colen <[email protected]> wrote:
I just did a quick test with the DA35 on the K-1 to see at which aperture
vignetting becomes a problem. The short answer is that aperture doesn't
make much difference, focus distance does. If you are focused to less than
about 20cm/8" the lens will not vignette. Further away than that, and
something occludes the corners of the sensor.
That explains why when I tested it, which it turns out to have been with
macro shots, I didn't see any vignetting, but when I used it to photograph
the sushi, I did.
--
Larry Colen [email protected] (postbox on min4est) http://red4est.com/lrc
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