Reviewing the 58mm f2 Carl Zeiss Jena Biotar M42 mount lens

When Aaron offered to loan me his 58mm, I had no idea that it was a Zeiss and over 60 years old.

Well, it didn’t take long to figure that out and to round up a simple M42 to Leica L mount adapter so I could get this lens on my Leica SL2.

The next thing I did was look the lens over really closely. The usual controls are there of aperture and focus but it has a third ring as well. This ring is spring loaded and is some sort of adjustable stop for the minimum aperture. This is how it works, you pull the ring towards the camera, compressing the spring. While the spring is compressed, you rotate the ring and align a mark on it with the aperture you want it to stop at. Once here, release the spring and it will seat in this position stopping the aperture ring from stopping down past this point. This was for cameras back in the day as you had to meter the scene manually then set the aperture for the meter value. To compose though, you needed all the light you could get so you set the ring for the aperture you plan to shoot the photo at then you would open the aperture all the way to see good and get good focus. Once this was done, you could simply spin the aperture ring to the stop and it was set to the metered value and you didnt even have to come off the camera to do it. Pretty slick if you ask me.

Another item of note is that the aperture ring is ”clickless” or in other words, it simply turns smoothly through the range without any detents to locate it at specific settings.

The next thing I noticed is that the machine work is impeccable…which I have grown to expect no less from the German people. The focus ring is smooth as silk even with its advanced years. Quite the opposite of some of my other lenses to be quite honest.

Something else I noticed is that the lens has incredible close focus with about 330 degrees of focus throw. Of that 330 degrees it devotes probably 250 degrees to close focus. Crazy precise focus for a lens this old. The first 1/4 turn though is the normal use range so it will go from infinity to 2.5 meters in that 1/4 turn and then the rest of the throw is for close range work. Pretty neat how the normal range stuff is in such a short throw so you can get focus fast with it. Just a little practice and you a can get street photos of moving subjects and fairly large apertures in focus. You just learn how to use it with some time.

It is not a bad lens in any way either, just look at the photo of Teresa I got at the local state park one day with it. Razor sharp and great rendition too. This is what makes vintage lenses so cool, they still got it…

It also works great for a general purpose walk around lens too. I liked using it for my photowalks where I would jus grab a photo here and there of things that caught my eye and it would render these scenes really well.

So if you are into the vintage glass “look” then I might suggest grabbing one of these old girls if you can find one and adapting it to your mirrorless camera to see what you can get with it. I think you will be pleasantly surprised.