M42 lenses don't work the same way as K lenses. In manual the lens is
always stopped down to shooting aperture and the meter will give you the
correct exposure, as long as you're within the meter's operable EV
range. In auto the lens will never stop down, but you'll get the
correct exposure at maximum aperture. You will be limited to center
weighted and spot metering like K lenses.
On 11/4/2010 2:03 PM, Subash wrote:
hi,
anybody have experience with this lens? pretty heavy, a little over
1.5kg, but i saw one today for sale, it's in almost mint condition and
so badly needs a caring home :) the one i saw today is the one on this
page:
http://www.pentaxforums.com/lensreviews/Takumar-300mm-F4-1962.html
i guess what i really want to know is that once mounted with an m42
adapter, does one use this like a K/M lens with stop-down
metering/green button? would appreciate any input you may have...
thanks, subash
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