Skip to main content

Half Stuck

If you're lucky enough to own a half-frame Canon Demi C you can make what I made today. My Demi has two lenses - a 50 mm and a 28 mm - of which the 28 mm is never used. So, I thought, why not make use of it on another camera? The mount is unique to the C so no other camera will accept the lens unless you convert it. After testing the distance needed to the sensor on my X-Pro1 rangefinder, with the M39 screw mount adapter on, I came to the conclusion that a converted body cap would be the only choice to mount it.

So i cut a hole in it and after a bit of fiddling the lens fit and did focus at infinity.

Sugru 'rubber clay' is what I think will do the job of sticking the lens to the "hollowed" cap.

I'll get back in a bit with pictures and more thoughts on this project.


This is the first image with the modified lens on my X-Pro1. It looks really good at 1 meter and infinity also. There are no aperture blades inside the lens, due to the Demi C:s construction, so it is constantly wide open. This will result in a constant shallow depth of field unless in very strong sunlight.

This is also at 1 meter, wide open lens at aperture 2,8, 1/64th of a second and 1600 ISO. The depth of field is about 10 cm. And there is my finger! - it's a small lens and the focus ring is at the front. I'll have to think of that.

I have taken a couple of test pictures with the lens mounted on a full frame M39-camera. Most probably the effect will be similar to the Industar 69 28 mm half-frame lens on a full frame, with heavy dark 'vignetting' in the corners making it necessary to crop the picture in editing, not gaining access to the full 28 mm. More like a 35 mm frame size. I will get back to this eventually.

This is my first lens conversion, not counting the bits of lenses I hold in front of other lenses to get macro shots. I would say it's a success so far!


Popular posts from this blog

Chaika Leica

Well, here's a Chaika 2M that I bought from Alex Helios via Instagram.  It's a great full manual viewfinder half-frame camera. The wheel on the top is for shutter time selection, from B to 1/30th to 1/250th of a second. The square button on the front right of the camera is the release/exposure. The lens mounted on the camera in the picture is not the original Industar-69. The Chaika is a rare model compact camera since the prime lens is detachable. What is more is that it has M39 screw mount. But - like with the Paxette M39 system - you can't get focus with a lens from another M39 system. Unless you adapt the lens or - in this case - the camera (mount)! The Chaika mount is easily detached from the body by loosening four screws. If I want to mount the Leica thread mount M39 (LTM) lenses on the Chaika - which is my goal with this mod - I have to add 1.3mm to the mount. That is what is needed to change the camera's flange focal distance (FFD) from Chaika system to L

A busy photographer

This photographer is now an owner of a house with all that entails. That is my focus since October and will be for some time.


A Lomo Smena 8 camera with a faulty shutter. An Olympus Pen F camera. Part of a microscope adapter for the Pen. That's what I started out with. 45 minutes later I had a new lens! Mount The mount came off a microscope adapter. I got the adapter from my first (of two) attempts to buy an Olympus Pen F. There seem to be some unscrupolous ebay sellers around peddling useless Pens with microscope adapted prisms. Luckily - in hindsight - I got a microscope adapter with this first Pen. Which I now trashed when a Lomo Smena 8 without a future landed on my doorstep (figuratively speaking). Conversion / Havoc Smena I only knew the camera as a half-frame camera [Correction - it's a full frame camera!] called Smena 8 and hadn't thought to place it in Lomography-land until I read the name Lomo on the lens when it was already modded. Unwittingly I had tread the tiles of lomo-dom twice in as many weeks, also having put two rolls through a Praktica CX-1 which appears to be Gr