Large format lens

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Large format lenses are photograpic optics that provide an image circle large enough to cover large format film or plates. Large format lenses are typically used in large format cameras and view cameras.

Photographic optics generally project a circular image behind the lens. On smaller format cameras the image circle generally covers only the intended film size with little room to spare. Large format lenses are an exception. For large format use the circular patch of image light usually extends beyond the minimum size circle needed to fully cover the rectangle of the film. The extra image offers some or a great deal of room to spare since large format cameras usually make use of camera movements that re-align the lens away from dead center on the film. The film is often positioned as far off center as just inside the periphery of the image circle.

The "movements" of a large format camera allow unique control of the plane of focus and of perspective. Large format optics are designed to allow the camera to take fullest possible advantage of movements.

A full description of the uses and purposes of camera movements is at View Camera Movements

The major design for large format lenses are:

1 Wide Angle
2 Normal
3 Tele
4 Others
5 External links

[edit] Wide Angle

[edit] Hypergon

Zeiss Series V Protar
B&L Protar
Goerz/Zeiss Hypergon 6in/150mm

[edit] Topogon

Bausch & Lomb: Metrogon, Process Anastigmat
Boyer: Perle
Busch: Omnar
Dallmmmeyer: Wide-Angle Anastigmat
Goerz: Geotar, Rectagon
Ilex: Anastigmat Series D
Kodak: Wide-field Ektar
Meyer: Aristostigmat
Rodenstock: Eurynar, Luminar, Ronar
Ross: Homoentric
Schneider: Isconar
Wollensak: Wide-angle Raptar
Zeiss: Kekla

Most needed central filter to minimise the effect of light loss to the edge.

[edit] Hologon

super angulon

Got other design like XL.

[edit] Biogon

[edit] Dagor

Good for larger than 4x5. WL alternative design. The Dagor name comes from Double Anastigmat Goerz.

[edit] Super Symmar Xl

Zeiss: Orotho-Protar
Statz Anastigmat Series VI
Schneider: Angulon

[edit] Normal

[edit] Basic Design

Zeiss Anastigmat Zeiss Tessar

Berthiot: Flor, Ilor
Boyer: Saphir
Busch:Glyptar
Dallmeyeralmac, Perfac, Serrac
Erenmann: Ernon
Hermagis: Hellor, Lynx
Ilex: Paragon
Kodak: Ektar
Laak: Dailytar
Leits: Elmar, Varop
Meyer: Primotar
Playbel: Anticomar
Rodenstock: Ysar
Ross: Xtralux
Roussel: Stylor
Schneider: Comparon, Xenar
Tayer-Hobson: Apotal, Ental
Voigtlander: Heliostigmat, Skopar
Wollensak: Raptar
Wray: Lustrar

Some has apo for controlling the chromic abrreviation

[edit] Heliar

[edit] Sonnar

[edit] Artar

always come with apo-artar and very very sharp. Very famous make like kodak ektar 203mmf7.7.

[edit] Planar

Agfa: Soligon
Angenieux: S-type
Astro: Kino, Tachar
Bausch & Lomb: Aminar, baltar, Raytar
Boyer: Saphir
Dallmeyer: Super Six
Enna: Annaston
Isco: Westagon
Kinoptik: Apochromat, Fulgior
Kodak: Ektar, Aero Ektar
Leitz: Elcan, f/1.2Noktilux, Sumarrit, Summar, Summitar, Summicron, Dygon
Domiron
Rodenstock: Heligon
Ross: Xtralux
Schneider: f/2 Xenon, Xenogon, Xenotar
Steinheil: Quinon
Taylor-Hobson: Amotal, Ivotal, Kinic, Opic Panchrotal, Speed Panchro
Wollensak: Raptar
Wray: Copying Lens
Zeiss: Biotar, Flexon

Not important for b/w where contrast is more important than resolution. This design is very important for colour photos, as it has beeter resolution. Good examples are apo-symmar and apo sirona or more coverage such as super symmar hm.

[edit] Tele

Very seldom and possibly mainly Tessar

[edit] Others

One special rare earth (with radioactive features) is Apo Lanthar. So is Kodak's Areo Ektar.

M-Componon
Tele-Arton
Tele-Xenar
Xenar
Xenotar

[edit] External links

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Categories: Cleanup from October 2005 | All pages needing cleanup | Lenses