hi all!
i just purchased (for almost nothing) an old russian screw-mount Jupiter
lense, and i wonder if you have prior experience with such lenses.
it is a 85mm f/2 one, very compact(short) with a too bulbous front element,
a 49mm filter size, and a reverse set up.(focusing ring close to the camera,
then the stop-down ring, then the aperture selection one.)obvioulsy the
glass is uncoated.oh yes, it is a manual focus one.
it is just the lense i need for the distances i shoot concerts these days.
and is the only way i could get a a f/2 cheap. that cheap that i won't mind
usinf it for paper weight if it proves to be a fluke.
i donot know if it is used 'cos the plastic cylindrical box and the lense
itself smell of grease. in fact there is old grease between the elements
module and the rest of the lense body which screw off. there are even traces
of grease among the 14 shutter leafs.
i ahd no chance to shoot a test roll with it but i did mount the body on the
tripod and run a comparison test with all my lenses.
here are the results:
f/22 f/16 f/11 f/8 f/5.6 f/4 f/3.5 f/2.8 f/2
jupiter 85mm = -- 1/15 1/30 1/90 1/180 1/350 -- 1/1000 1/1500
makinon @85mm=1/8 1/15 1/30 1/90 1/180 -- 1/750 -- --
pentax @80mm=1/15 1/30 1/60 1/125 1/250 -- -- -- --
note that the shutter speeds run close with my jupiter and makinon ones, and
are one stop faster than the pentax(though in practice overexposure of 1
stop is needed for the makinon). also note the ONE and a HALF stop
difference between f/11 and f/8 in both the non-Pentax lenses. that i cannot
explain...
so what do you think?
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