The first version of this series lenses (silver, zebra, MC electric - with f2.4).
Very intense coating deep inside.
10 blades. Pre-selection aperture. Very easy to use.
Aperture F2.8-F16. Next versions have already to 22.
The minimum distance is 36 cm. (Zebra has 18cm, MC 20 cm).
Only metal and glass. This version is much better than the Soviet MIR-1B. (Zebra was not.)
A very good test of a whole series of these lenses can find here. -
http://spiral-m42.blogspot.com/2009/09/czj-flektogon-35mm-1stsilver-2ndzebla.html
Optics: ★★★★☆
Superior colors. Sharp from vide open.
Ergonomics: ★★★★☆
Works accurately and softly. A very nice.
Build quality: ★★★★☆
Lightweight and very precisely made.
Market value / value of subjective: ★★★★☆
Less than $ 160 is a very good price.
Here are some sample pictures.
They were made with Sony Alpha 300.
Pictures were taken with aperture F/5.6 ISO-100.
Panorama merged in a graphics program without any changes in the images themselves.