An interesting table, Moose. Yes, the 40/2 was an inexpenisve lens, I missed
the chance to purchase a few for backup as I though it was just so so :-)
But I was wrong! One the field it is a great lens, good bokeh and sharpness
with better than normal close up capability, with a small Olympus Z-49 hood
mounted it is just great in handling and looking too. Under test, it is on
par or better than 50/1.4, better than 50/3.5 for edge performance for
infinity objects.
Here are two test shots, again no sharpen applied:
http://www.accura.com.hk/temp/IMG_3663_40F2_F2.JPG
http://www.accura.com.hk/temp/IMG_3664_40F2_F4.JPG
BTW, with all the test I have done, I found most Zuikos gave very good
performance wide open, with a little post processing they can fly!
C.H.Ling
----- Original Message -----
From: "Moose"
> Dawid Loubser wrote:
>> That makes sense. I've never used a 40/2.0 (would love one) but
>> symmetrical designs generally produce great background blur, and the
>> 40/2.0 is one of the few (if any?) OM Zuiko fully symmetrical lens
>> designs?
>
> The 40/2 is no more symmetrical than the various 50 mm lenses.
> <http://www.moosemystic.net/Gallery/tech/Lenses/SECT-HORIZ.jpg>
>
> The 40 mm and all the 50s, and indeed essentially all 40-58 mm pancake &
> normal FL lenses for 35 mm SLRs & FF DSLRs, are variations of the
> double-gauss design. Those faster than f2.8, depending partly on price,
> usually have an additional element. Thus the 7 element 50/1.4 & 1.2
> Zuikos.
>
> The economy 50/1.8 is 6 element and the 50/3.5 macro is slow enough to
> get by very well with a single element rear corrector lens. The 40/2 was
> an inexpensive lens when introduced. The 6 element design is probably
> partly to reduce cost and partly to reduce size. It's also the reason
> for it's slightly less than first rate performance, I'd guess.
>
> Pancake designs by various makers are generally around 40 mm for the
> simple reason that that is as short as a non-retrofocus, double-gauss
> design can be made within register distance and mirror clearance
> constraints.
>
> Moose
>
--
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