Tag Archives: Flektogon

Carl Zeiss Jena Flektogon 35mm f2.8 (Part 1)

like a child with a new toy! I mounted my new lens to the (m42-to-AMount) adapter and is about to embarge on a journey involving a fifty years old lens.  The glass is a Carl Zeiss Jena Flektogon in such a perfect condition that is is practically impossible to judge its age. It is masterly restored by Maziar Moarefi, and stands like a jewel with its bright chrome barrel (if you are interested in how then I think the best advice is “dont” this lens seems really complex and not a place to start). There is a luxury aura to it, which is making it painfully obvious that this is a gem that should be treasured for the next many years. The build quality of this piece of glass simply puts it in a league of it own. All metal and every moving part feels great. The aperture ring moves freely, and due to the brillant state of my edition it has very little resistance to it.

This version is known to have a really pleasing bokeh, I am ecstatic to see if I can produce some of the same results i see on the web with my edition. After all who does not love a very creamy, delicious bokeh. The accurate colour rendition of this lens, which many has come to know as the Carl Zeiss colour, should excel in the way that they should come out perfectly ‘real’ and gorgeous in an understated way. At the same time the contrast is known to be excellent.

Mechanically, this lens has a 9 aperture blades, which is preferable to the newer edition with only 6 blades. The blades are rounded and are superior to all, while allows the blade to resemble something that is closer to a perfect circle, giving the more perfect bokeh. The aperture goes from f/16 to f/2.8, smoothly, and without click stops. I guess that is something I need to get use to, as I am unconsciously counting the stops in order to know where in the aperture range I am. The focus is amazing, I tried it yesterday, very long walk on the dial, allowing for very accurate focus. The near limit allows this lens to be sharp from 0,36m (1,2ft) to Infinit.

It is difficult to describe the great experience this lens gives on my camera. There is little doubt that this is an absolutely stunning lens.  I hope you will follow my adventure with this lens…

Take me to Part Two

.. a few shoots from my garden…




New light in some old glass | Carl’s Glass #1

This is the second post of the topic “New light in some old glass”. See the first Blog about the Soap-Bubble Bokeh Primoplan lens here: Part 1: Soap-Bubble Bokeh Primoplan


Today I went out to test two more lenses in the beautiful city of Heidelberg. The Carl Zeiss Jena Flektogon Ultrawide 25mm f4 and the Carl Zeiss Biometar 120mm f2,8.

Flektogon Ultrawide 25mm f4

The first lens I want to talk about is the Flektogon Ultrawide. Its been produced in the period from 1945 to 1975 in Jena, Germany.The one I borrowed of my grandpa is one of the 1964 lenses.



The maximum aperture of this super sharp beauty is f4 and the minimum f22. The minimum focal distance is 20cm.

When you look at the sharpness of this lens is awesome. It is really sharp in the mid of the picture even wide open at f4 but blures out when you come to the images edges. Closing the aperture to f8 or f11 gives you a pretty stunning result.

Below you can see two Images to compare the sharpness at f4 and f22.




Biometar 120mm f2,8

The second lens I used today is the Carl Zeiss Jena Biometar 120mm f2,8. This is a really rare piece of Carl’s glass. Its a quite fast 120mm prime lens with its maximum aperture of f2,8.


The minimum focal distance of the Biometar is 1,3m. The colours are really nice and its damn sharp even af f4. Here is a test shot and a 200% cropped piece of it. DSC5165

The only problem with this lens is that there is a strange bright milky area in the midle of the picture. I did not figure out where it comes from. But here is an other really colourfull test shot. DSC5139

I am going to use the 120mm f2,8 the next time im going to shoot portrait and then i’ll update this post or create a new one about shooting portrait with exakta lenses.