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Re: [Rollei] Lens names
- Subject: Re: [Rollei] Lens names
- From: Richard Knoppow <dickburk >
- Date: Fri, 23 Nov 2001 10:21:57 -0800
At 07:02 PM 11/23/2001 +0100, you wrote:
>why do the names of lenses or lens groups finish by R (Tessar, Sonnar,
>Sorry for possible OT posting.
Many lenses have names ending in "ar" or "tar" but many do not. I am not
sure what the origin of this is. The "at" ending somtimes found is from
Anastigmat". Many lenses have names made up of Latin or Greek roots,
sometimes a mixture of both.
Tessar comes from its having four elements. Sonnar means "like the sun"
meaning a bright image. Other lens names often indicate some property the
lens is supposed to have such as Planar (flat field) Rapid Rectilinear,
meaning no geometrical distortion and a fast lens (f/8 was fast in 1866),
Orthometar (correct measurement) originally an aerial mapping lens. Many
Zeiss lenses are named this way. Gon endings (Biogon) usually indicate a
wide angle lens, gon coming from a root for angle.
Some lenses are named after the manufacturer. Dagor means Dopple
Anastigmat- Goerz. Kodak Ektar is simply Eastman Kodak + tar.
Boyer, an old French company, named their lenses after jewells, i.e.,
Saphir, Topaz, etc.
Some companies, Canon for example, don't name specific lenses, they are
all just Canon Lens.
Los Angeles, CA, USA