I have the Panny 7-14, and I love it. doesn't show a lot of unusual
distortion, no more in fact than my Nikon 17-35, but I don't know about
software fiddling. Works equally on my GX7 and on my EM5ii
-----Original Message-----
From: Moose
Sent: Thursday, February 25, 2016 2:58 PM
To: Olympus Camera Discussion
Subject: Re: [OM] New Panny lens
On 2/25/2016 5:57 AM, John Duggan wrote:
Kowa Prominar 8.5mm f2.8 ?
Wish I could afford it!
I wasn't aware of that lens, or its siblings. I guess they aren't part of
the µ4/3 group? Not on the web site, anyway.
In any case, of no interest to me. I already have the M.Zuiko 9-18, which in
only one stop slower @ 9 mm, infinitely
smaller and lighter, cost a lot less and has other FLs as a bonus.
Or, for about the same price, I could get the slightly smaller, lighter
Panny 7-14/4. I just don't need the extra stop
in a super-wide and the wider end is a major benefit.
The Oly zoom @ 9 mm is not perfect wide open, but darn good stopped down a
little. Photozone's test shows that the KOWA
is also soft in the corners, esp. wide open. I'm guessing little or no
practical difference.
MF isn't a big deal at these FLs, but auto aperture is, to me. And getting
the lens data in EXIF is nice.
The difference between 8.5 and the 9 mm short end of the Oly zoom is tiny,
and could, in fact, be reversed in any given
pair of lenses. Unfortunately, contemporary lens testers don't measure
actual FL. In the occasional head to head
comparison one will see that the actual image field of two different lenses
of the same spec. for FL will be quite
different, but no details, as these testers don't have test benches.
Back when Modern and Pop photo did lens testing, they checked actual FLs for
their samples. Modern's criterion for
meeting spec. was ±5%. Their lab measurements for the samples of two OM
Zuikos they tested were:
Spec FL Var. AOV
Zuiko 18/3.5 18.76 4.2% 98.1
Zuiko 21/2 20.15 -4.0% 94.1
Anyone with those particular two lenses would have, in effect, faster and
slower versions of the same AOV. Someone else,
who hit the other ends of the range, might have 17 and 22 mm lenses.
The ±5% range for these lenses is
Spec -5% +5%
KOWA 8.5 8.075 8.925
Olympus 9 8.55 9.45
In any given pair, the Oly could be wider than the KOWA - or not.
So, Oly and Panny, where's that 7/4.0 rectilinear?
Just the Specs Moose
--
What if the Hokey Pokey *IS* what it's all about?
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|