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The definitive equipment listing for Prakticas on the internet
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 Lenses -> M42 -> Carl Zeiss Jena Flektogon 4/20
   
Construction - 10 elements, 6 groups
Angular field - 93°
Minimum focusing distance - 0.16m
Diaphragm action - Fully automatic
Minimum aperture - f/22
Filter size - 77mm screw-in type
Push-on diameter - 80mm
Weight - 320g
Barrel length - 59mm
Description - The first model of this lens was finished in bright flutings on both focussing and aperture rings, and has normal coating. Then it was revised as a multi-coated, all-black version with checkerboard-type focussing grip. Replaced by 2.8/20.
 
Lens schema:

Carl Zeiss Jena Flektogon 4/20
Pictures taken using this lens:


Declaration Signing Room by Jack Everetts

Additional data:
Camera: Praktica IV FB
Shot on Fujicolor NPH 400 with 2s

This particular photo was taken inside Independence Hall in Philadelphia. Our Founding Fathers signed The Declaration of Independence in this room on July 4, 1776.



Porsche 911 GT by Jack Everetts

Additional data:
Camera: Praktica IV FB
Shot on: Fujicolor NPH 400 film, at 1/100 sec at about f5.6 - f4.

This is a photo taken in January 2002 at the Detroit Auto Show. The image has been slightly cropped in Adobe Photoshop Elements, and the word "Porsche" was added to the upper left corner.

 
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