*** NOTES ***

* All tests photographed at a 1:40 magnification ratio, on Fujichrome 64T (original type) film.

* Test subject: Grand Canyon National Park USGS topographic map (1 to 1 2/3 stop underexposure from a grey card reading).

* Subjective quality factor style grades are relative, with A+ = best, then B, C, D, and F (worst); differences are significant across full letter grades only (unless a paired comparison was made - as noted). Corner grades are measured at 66% out from center and are less rigorous than center grades.

An A+ grade for centers and corners is set to the performance of an Olympus 50mm f/2.0 Zuiko Macro at f/8.

A = "Tack sharp" professional grade images with great enlarging or projection capability. Approx. 20x30" or larger print size capability.

B = Very good images that will satisfy all but the most discerning users; projected image quality is indistinguisable from an A grade at normal viewing distances. Approx. 11x17" enlargement capability.

C = "Soft" images that cannot withstand much enlargement - suitable for snapshot quality images (5x7").

D = "Smudged" with obvious image defects in even small degrees of enlargement, not suitable for most users (only 3.5x5").

F = unacceptable image for any type of use, lacks detail, only convays shapes.

* Evaluations made at 24X projection magnification through a Rollei-Vario-Projar 70-120mm lens at ca. 100 mm focal length.

* Vignetting (a.k.a. light falloff) grades:
A = none
B = noticable, but minor
C = apparent and intrusive
D = unacceptable.
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My thanks to various owners for lending me additional lenses. Storage USA, the Athletic Arts Academy (both of Las Vegas) graciously allowed room in their facilities for telephoto lens testing.

Gary