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Re: [Rollei] Lens names
- Subject: Re: [Rollei] Lens names
- From: Jerry Lehrer <jerryleh >
- Date: Fri, 23 Nov 2001 12:44:59 -0800
- References: <220.127.116.11.20011123102157.008684e0 >
On the Canon lens names, weren't they called
SerenAR for the early lenses?
Richard Knoppow wrote:
> At 07:02 PM 11/23/2001 +0100, you wrote:
> >why do the names of lenses or lens groups finish by R (Tessar, Sonnar,
> >Sekkor, Nikor...)?
> >Sorry for possible OT posting.
> >Jose Royo
> 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.
> Richard Knoppow
> Los Angeles, CA, USA