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Carl Zeiss Jena Flektogon 20 mm f/ 4 Lens

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Carl Zeiss Jena Flektogon 20 mm f/ 4 lens

Carl Zeiss Jena Flektogon 20 mm f/ 4 lens

Carl Zeiss Jena Flektogon 20 mm f/ 4 lens

Carl Zeiss Jena Flektogon 20 mm f/ 4 lens

Optical design

Carl Zeiss Jena Flektogon 20 mm f/ 4 optical design

Format: 35mm SLR

Type: Prime lens

Focusing: Manual Focus (MF)

Lens mounts: M42

Optical design: 10 elements in 6 groups

User reviews (2)

Photos (14)

Tests (0)

Owners (20)

Views (46388)

Average price: $2500

Specifications:

Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr/oz)Length (mm/in)
20mmf/4.0f/2260.1677320/11,359/2,3

Additional information:

The Carl Zeiss Jena Flektogon 20 mm f/ 4 is an ultra wide-angle multicoated lens for a 35mm SLR with a M42 screw mount.


Links to online resources:
PDF Files:
Posted by: Sergei Borodin   Date of publication: 02.08.2010



Photos taken with this lens Carl Zeiss Jena Flektogon 20 mm f/ 4:


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Autor: Sergei Borodin
5 0 9475

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Autor: Sergei Borodin
5 0 7196

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Autor: Sergei Borodin
5 0 8196

Wieliczka salt mine, Poland
Autor: stimilek
5 0 2848

Mechanical quality3.9315
Optical quality4.7315
Usability3.9415
Pricing / Value3.3415
Bokeh4.3614
Overall lens rating
4.06

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Owner reviews: Carl Zeiss Jena Flektogon 20 mm f/ 4

JMiguel 20.06.2023 06:14:05
Period of use: 5 months

Strengths:

This is a very sharp lens and the images are saturated with beautiful colors. Small and lightweight. I use it for Landscape photography on my Sony a7Rii.


Weaknesses:

It is dificult to focus because the focus ring is big and in my copy not very smoth. I don't think is a good walk around lens but excellent for landscape photography.


Comments:

I got my at a very low price, it was mounted in an Exakta camera. The camera was damage, but I opened the lens and fixed,  (it was missing the rubber that goes on top of the focusing ring, I bought a generic one and was able to use it with good results) I manage to salvage the lens and I have used it with excellent results.




Сергей Бородин 1.1.2000 00:00:01
Period of use: 2 years

Strengths:

Incredible picture quality. You can shoot at 15 cm. No optical distortion. Small size and weight.

Weaknesses:

Construction is not very reliable, although of course much better than the modern plastic. Not too smooth focusing. Expensive 77mm filters. Without the hood catch glares.

Comments:

Almost a perfect wide-angle lens. It's great to use for shooting HD video on a Canon 5D mark2.

The quality of images compared with the Canon 17-40 L (sharpness in the center and edge, contrast, vignetting, distortion). With a wide margin Flektogon win in all parameters.