I have both lenses. The difference in feeling, in hand, is greater than the numbers suggest. The f2.8 feels and looks
somehow more serious, professional, or something.
The diameters are no mystery, when you realize that the mount itself is 59 mm. As far as I know, Oly never made any
regular lenses with a diameter on the rear of the body less than that. That's probably why the µ4/3 25 & 45 f1.8s look
odd to me, with a thin body, flaring out to the mount.
Generally, at least on lenses where the focusing ring is close to the mount, it seems they elevated the focusing ring
slightly relative to the mount. If you look at the detail pages for these two, you will see that they are almost
identical in diameter in the rear, but the f3.5 is smaller in the front half.
In hand, the two 200 mm lenses also seem more different than the numbers would suggest. Because they are both relatively
small and light, I preferred the 135/2.8, but because they are starting to get big and heavy, I preferred the 200/5.
I've used both the 200s, but I think I may not have actually used the 135/3.5, acquired in some batch buy. As Mike
recently suggested on TOP, the 135 was never a FL I loved, anyway.
Looking at far more recent, more objective data, when I had a full range of FLs to play with, almost all with the
14-150, a few with Panny 45-150, 11% were in the range of 60-75 mm (120-150 mm eq.)
Quantifiable Moose
On 1/11/2016 4:55 PM, Chuck Norcutt wrote:
135mm 3.5 Takumar
=================
Weight Diam x Length Filter Min. Focus Max. Magnification
320g (early), 343g (late) 59.5mm x 87.5mm 49 mm 150 cm 0.11x
much more at
<http://www.pentaxforums.com/lensreviews/S-M-C-Super-Takumar-135mm-F3.5.html>
135mm Zuikos
============
f/3.5 Zuiko quite a bit smaller and lighter
<http://omesif.moosemystic.net/om-sif/lensgroup/135mmf35.htm>
weight 290g. length 73mm. diamter 60mm
2.8
<http://omesif.moosemystic.net/om-sif/lensgroup/135mmf28.htm>
weight 360g. length 80mm. diameter 61mm
Nearly the same diameter as the 3.5 is a surprise to me.
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