Catadioptric objective
An objective catadioptrics is an optical system functioning at the same time with lens S and Miroir S.
The objectives with Catadioptre S function like telescopes Cassegrain. The system of mirrors makes it possible to obtain a system lighter and more compact than the traditional systems of focal equivalent (typically, 500 or 600 mm). This treats to by a toroidal Bokeh generally regarded as displeasing and a weaker opening maximum (about f/5,6 or f/8).
Principle of operation
See too
On Wikipédia
Teleobjective
External bonds
- a post of forum where the principle of the catadioptric objectives is explained in detail.
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