Posted by Bob Stoddard on November 06, 2000 at 17:18:27:
In Reply to: lens for 1:1 shooting pacemaker speed posted by Carol Whitehill on November 05, 2000 at 21:47:31:If you are asking whether there is a supplementary lens which
can be placed over the front of the 135mm Optar to permit 1:1
reproduction ratio without extending the bellows, then I don't
think so-- all the common sets that I have seen have nothing
stronger than +3 diopters, which would give about 1:2.5 with the
lens at the normal infinity position. However, such supplementary
lenses can minimize the extra bellows extension needed to reach 1:1
ratio.
Also, shorter than normal lenses in place of the 135mm Optar can
also work well. A lens that only covers 2-1/4 square negatives at
infinity will easily cover 4 x 5 at 1:1. RKS