1957 Jupiter-9/1987 Jupiter-9/Summicron 90 comparison

Lenses mounted on a Nikon D70.

Jupiter-9 (85/2) lensheads mounted in M39 short mount with m39.M42 and M42>Nikon F adapters. Shims adjusted for infinity focus.

Summicron 90/2 (First model, 1957 design, 1966 manufacture) in short (Visoflex) mount with Marty Forscher Viso>Nikon F adapter

Each lens shot at f/2, f/4 and f/8.

Full frame, from which comparison slices of the combo shots were taken (Jupiter-9 1957 at f/2):

(J9 57 f/2, click for full resolution)

Combo shots linked below are at full sensor resolution, 500KB JPEGS, 14MB when opened in photoshop. Suggest right-click download to disc, and open in Photoshop.

A vertical slice of the image is compared at f/2, f/4 and f/8:

1957 Jupiter-9: J9_57_combo.jpg

1987 Jupiter-9: J9_87_combo.jpg

1966 Summicron 90: summicron90_combo.jpg

Observations:

The 2 Jupiters are very similar in performance. Resolution is acceptable wide open, and rapidly improves on stopping down. The Summicron is excellent wide open, with slight improvement stopping down.