Carl Zeiss Jena Triotar 135mm f4 M42

The Triotar is a large lens and heavy. Very sharp. Focusing is difficult.
Aperture Blades - 15 - beautiful bokeh.
Max Aperture = F4 Min aperture = F22
Pre-set control with half stops between F4 and F22
Min Focus distance is under 1.2m
Optical scheme: Triplet, 3 lenses in 3 groups
Filter thread = 49mm

Optics: ★★★★★

Sharp, sharp, sharp.

Ergonomics: ★★★☆☆

It is difficult to focus because of the size and weight of the lens. The focus ring is not precise.

Build quality: ★★★★☆

Heavy metal indestructible.

Market value / value of subjective: ★★★★☆

Less than $ 150 is a very good price.

Here are some sample pictures.

They were made with Sony Alpha 300.

Pictures were taken with aperture F/5 ISO-100

All photos without amendment in graphics programs.

Pictures were taken with aperture F/4 ISO-100