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Bausch & Lomb 800 mm f/ 10 Lightweight Mirror Lens

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Bausch & Lomb 800 mm f/ 10 Lightweight Mirror lens

Bausch & Lomb 800 mm f/ 10 Lightweight Mirror lens

Format: 35mm SLR

Type: Prime lens

Focusing: Manual Focus (MF)

Lens mounts: T2 mount

First year of production: 1992

Last year of production: 1992

Optical design: 5 elements, 3 transmissive and 2o mirrors. Mangin-Cassegrain with flat secondary mirror followed by a two-element correction group.

Features: Mirror lens
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Specifications:

Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr/oz)Length (mm/in)
800mmf/10f/10 230/9,1

Additional information:

Bausch & Lomb 800mm f/10 Lightweight Mirror is ultra telephoto prime lens for 35mm SLR cameras.

A relatively lightweight 800mm combination camera lens and spotting scope. Originally came with a star diagonal, eyepiece, and an adapter from the standard 1.25" telescope mount to a standard "T" mount, which can then be adapted to a wide range of cameras.

In my tests (link below), I found that this performed a bit better than many other adapted mirror telescopes, but nowhere near as well as the superlative Olympus OM Zuiko 500mm ƒ/8 Reflex lens, which was designed to be a lens from the ground up, and also not as well as the Vivitar 500/8 mirror, also designed as a lens.

This would be a good choice for someone who wants both a camera lens and a spotting scope, especially if they are not picky about the absolutely best performance. It certainly provides adequate performance for wildlife shooting, while having more "reach" than the large pack of inexpensive 500/8 mirror lenses.


Links to online resources:
Posted by: Jan Steinman   Date of publication: 24.10.2019


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