Lens Tutorial from Photo.net.
Focus, Depth of Field, and other Photo topics by Harold M.
To re-coat or not: Lens Recoating
and Prism ReSilvering FAQ by Robert Monaghan.
Faults Hierarchy, also by Robert Monaghan.
Fujinon lens unofficial information,
plus lots more from Kerry's Large Format Home Page.
Introduction to Lenses for Large Format Camerasfrom LFPhoto.info.
Large Format Lenses: specific wide-angle and normal lenses:
Dagors, Angulons, Super Angulons, and othersfrom LFPhoto.info.
Discussion on longer focal length lenses
(300-600mm)also from LFPhoto.info.
More specifications from LFPhoto.info
including Dagor, Ektar, Artar, and Tessar.
This one from LFPhoto.info
covers soft focus lenses.
Here's a discussion thread about Rapid Rectilinear &
Anastigmat lenses from the forum at LFPhoto.info.
Info About Compur, Ilex, Compound Shutters from S. K. Grimes.
Includes descriptions and thread dimensions.
Specifications for Several types of Lenses from Graflex.org.
Includes Schneider Super Angulon, Nikkor SW, Rodenstock Grandagon, Sinar Sinaron W,
Fujinon SWD and SWDS, Calumet Caltar in various focal lengths.
Specifications for many Rodenstock Lenses from ProGraf.
Includes Apo-Sironar-N, Apo-Sironar-S, Apo-Sironar-W, Apo-Macro-Sironar and
Apo-Macro-Sironar-N, Apo-Grandagon, Grandagon-N, Apo-Ronar, and Imagon.
Allen Rumme has assembled a database
of lens specifications.
Jim Galli compares four 8x10 lenses at various apertures: a Gundlach Meniscus
18", a Cooke 12 1/2", a Meyer Goerlitz Aristostigmat 14", and a Beach
Multifocal Series A 16".
Or visit the official Rodenstock website.
(Rodenstock is a division of the Linos Group Gmbh.)
lists specifications for several types by focal length.
Bruce Barrett lists specifications sorted by coverage within a lens's length.
of focal length for medium and large format cameras (compared with 35mm).
Direct to Schnieder Optics' website section on Large Format Lenses. Want to find out how old
your Schneider lens is?
A bit of math, but excellent reading: Lens DesignCriteria and Considerations by Erwin Puts.
Lens/Format Coverage from Red Hill Photography.
A collection of illustrated articles on the chief causes of image
degradation from Van Walree Photography and Optics.
Christopher Perez and Kerry Thalmann test a huge selection
of Large Format
Lenses. Results are sorted by focal length.
Ole Tjugen compares two 90mm
Articles on lens (and camera)
repair from Kar Yan Mak Photography. This site also hosts a forum for camera and lens
An article about Cooke
lenses from the folks at f32.net.
An article about the Cooke Triplet from the official Cooke Optics website. And another article, about the
Portrait PS945 Lens.
What's the difference between Achromat, Apochromat, and Superachromat? (From Zeiss.)
Wikipedia listing for Photographic
lens. Also, a discussion of Achromat, Apochromat, and Superachromat.
Interesting information about fungus
More info about fungus (from Zeiss).
A Roger Hicks & Frances Schultz article about re-shuttering lenses.
A Primer on Petzval