On 3/12/2016 11:22 AM, P.J. Alling wrote:
On 3/12/2016 10:40 AM, Bill wrote:
On 3/12/2016 6:24 AM, mike wilson wrote:
On 11 March 2016 at 23:04 Larry Colen <[email protected]> wrote:
Interestingly, Ricehigh's blog says that the DA 35 macro has severe
vignetting on full frame. When I put the lens on a film body and look
through it I don't notice severe vignetting. Has anyone actually taken
any photos with this combination?
Has anyone tried other DA lenses?
First thing I did was stick the 18-55 on both the LX and Z1-p. Both
seemed to
show vignetting in the viewfinder below about 24mm. Allowing for
viewfinder
discrepancy, I would expect vignetting on film to begin somewhere
between 24 and
30mm - probably closer to the former.
To get an accurate idea, you would need to either adapt a lens to
something like a Sony A7, ot put some film in your Z1p (I presume it
allows aperture control from the body) and shoot some pictures. The
size of the image circle changes as the lens is stopped down, so a
lens that is no good wide open may be OK stopped down a bit (or a lot).
bill
Shouldn't just worry about the size of the image circle. That may be
big enough to cover larger format. But anything outside of the intended
format size may be poorly corrected for aberrations CA and very soft
compared to the center of the frame.
I had an old Schneider 80mm lens that had originally been designed for a
folder of some sort. I adapted it to 4x5. It was brutal until f11, and
then all of a sudden it was stellar.
I think increasing the size of the image circle keeps a lot of edge
problems on the perimeter. I'm sure someone will prove me wrong, I only
have one real world example to go with, and have noticed in many cases
that lenses that have poor corner performance wide open do get better,
often significantly if they are stopped down.
bill
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