I think I've asked here before, why is 70mm such an orphan focal length?
If one builds a set of lenses around a factor of 2X differences in
focal length on can readily find 24, 50, 100, 200, and 400. If one does
the same using 1.4X one can readily find 17/18(17.5), 24(25), 35, 50,
70, 100, 135(140), 200... oops! Umm, where is that 70mm lens that
belongs in the sequence?
Chuck Norcutt
Ken Norton wrote:
>> An interesting question. Gary Reese tested the 40/2 and found it low
>> contrast and soft in the corners at f2. It sharpened up quite a bit at
>> f2.8 Of course the 35-100/2 would run circles around it at 4omm and
>> f2--but at bit of a high price.
>>
>
> And don't forget the size difference between the 40/2 and the 35-100/2. Not
> exactly a fair fight.
>
> The 40/2, which is blasted near perfect with film somehow doesn't seem to
> hold up quite as well with digital. It's still mighty fine (especially the
> bokeh), but hasn't been the ultra-lens that we'd hoped it would have been on
> digital.
>
> I've been a fan of the the 50/1.8 and 50/1.4 on the E-thingies. When stopped
> down to F2.8, those two lenses seem to come into their own pretty well. The
> bokeh isn't as nice as the 40/2, but they have a nice edginess to the
> images.
>
> But if I had to pick my favorite film Zuiko in this range for placement on
> an E-thingy, I vote for the lowly 35/2.8. This lens performs quite well
> wide-open for an equivalent of 70/2.8. Not shabby. Best thing about it is
> the bokeh. The bokeh of this lens really is special--perhaps one of the most
> underrated lenses in the entire line-up. Unfortunately, 70mm equivalent
> focal length is one of those unusable focal lengths as it is too long and
> too short at the very same time.
>
> OK, must spout off on one lens, though. The 35-80 F2.8 is absolutely
> glorious on the E-thingies. But not small or lightweight. (or cheep).
>
> AG
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