In article <434lsl$d1h@agate.berkeley.edu>, murthy@rice.eecs.berkeley.edu says...
>I am looking for any comments on the following lenses for Kodak >carousal projectors:
>102/2.8 Curved field
>100/2.8 Flat field
>127/2.8
>102-152/3.5 Curved field
>100-150/3.5 Flat field
>Are any of the above particularly good or bad (contrast, sharpness >etc)? (....)

They are all (except the 127mm - I am not familiar with it) similar
in performance: good, but not great (the curved-field lenses SOMETIMES
help, since slides are bowed in the mount [cardboard mounts seem to
hold film flatter than plastic mounts, though for other reasons, I
sometimes prefer the plastic {clean edges, ability to straighten the slide in the mount without remounting}]). Unfortunately, much more
money spent on professional projection lenses usually brings only
moderate improvement. Two things help, if they are practical for
you: using unusually long lenses, and placing a black paper diaphram
in the back of the lenses listed above (with a hole sized to "stop
down" the lens about a stop). These are compromises, but you should
notice sharper slide projection.
Hope this helps.