Bizarre lens collection coincidence...

frank theriault knarftheriault at
Mon Oct 5 23:35:15 EDT 2009

On Mon, Oct 5, 2009 at 6:38 PM, P. J. Alling <webstertwentysix at> wrote:
> Yes, this post makes me officially bored.   I'm sitting at my desk looking
> at a collection of 5 lenses that I just happened to have sitting there, two
> zooms and three primes, and regardless of focal length they are for all
> intents and purposes the same physical length, well within 1/2 a centimeter
> anyway, from mount to filter thread, regardless of maximum focal length, and
> as two of them are mirror telephotos there is quite a range in focal length.
> The Vivitar S1 35-85mm f2.8 is about 3mm longer than the smc Pentax 135mm
> f2.5 which is just about 5mm shorter than the smc Pentax F 70-210mm
> f4.0~5.6, which is exactly the same length as the Kalimar 500mm f8.0 mirror
> tele, which is about 4mm longer than the Vivitar 600mm S1 Solid Cat.  It's
> not on the desk but the smc Pentax FA 28-200mm f3.8~5.6 falls right in that
> physical length category as well,  just a  about 3mm shorter than the
> 70-210.  Now that I think of it, the smc Pentax [K] 135mm f3.5 is the same
> length as the f2.5 135.   It's kind of weird.   A good 50% of my long glass
> is the same physical length when stored.

I bet the Vivitar S1 35-85 is the heaviest of the bunch.  I'm
surprised by its mass every time I pick mine up and put it on a


"Sharpness is a bourgeois concept."  -Henri Cartier-Bresson

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