Here’s another shot taken with Kodak Portra 160 film using
the 135mm, f2.8 lens fitted with a Pentax 2X Rear Converter. This teleconverter
effectively doubles the focal length of the lens from 135mm to 270mm.
Unfortunately, the teleconverter also reduces light to the film by 2 stops and
reduces the depth of field significantly.
Taken in the evening as the sun was setting it was necessary
to open the lens up all the way and shoot at 1/125 shutter speed to get this
shot. All of the test photos taken with
the converter appeared sharp and more than acceptable although the loss of
light and depth of field was definitely noticeable and had to be accounted for.
I would seriously consider using a faster film and/or limiting the use of this
lens arrangement to brighter venues or times of the day.
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