I have written about the Leica iiig in the context of other Leicas here. Briefly summarising these are the key differences compared to the M3 for me:
Advantages
Smaller and lighter – not by much but it makes a difference.
The lever around the rewind knob allows me to adjust rangefinder focus whether I am wearing distance glasses, reading glasses or going commando.
A totally stupid reason but it looks more impressive with all the levers and knobs than the M3.


Disadvantages
The major one is you are stuck with LTM (screw mount) lenses.
Of course there are other differences that may matter to or bother you more – the main one being loading. The recommended method (not the risky one mentioned by Hamish in his otherwise excellent in-depth review) is as follows:
- Trim the leader. Between the 13th and 14th hole on the already shortened side of the film cut a gentle curve extending the length of the narrow part of the leader. Make sure there are no jagged edges – these can get caught and tear. Insert the film into the take-up spool making sure the film extends perpendicular to the spool.
- Load the film into the camera. Put the lens cap on. Gently rewind the film to take up the slack. Fire three or four shots making sure the take-up spool is turning evenly. If it isn’t turning after several shots then it hasn’t caught on the sprockets and you need to retry loading. Be aware that the process of inserting the film into the camera if not done evenly for both spool and film can mis-align the leader so that it misses the sprockets.
- If all is well turn the rewind lever and gently rewind the film until you feel the tension of the film in the take-up spool. Then turn the rewind lever back to ‘advance’, reset the frame counter to minus one and off you go. Generally I get 38 – 40 frames depending on film.

Once you’ve done it a couple of times it no longer seems so much of a hassle – just a minor one.
Lens
The Summitar comes in several versions – mine is the 10 bladed coated version from circa 1950. Although I shot with the Summitar on this occasion my favourite lens for the iiig is the f3.5 Elmar – the lens extends little more than the depth of the lens cap once collapsed making the camera pocket-able.
Film and development
Some years ago I compared FP4+ at 125asa vs 400asa with side by side shots using two cameras. I could find no difference in recorded dynamic range or image quality. Of course this was to some extent a function of the “normal contrast” images I was taking at the time. This time it is fair to say low-light image detail was lost in high contrast scenes.
The film was developed in Rodinal 1:24 for 20 minutes at 20degC.
Images were scanned on a Sony A7Riii with a Sigma 105mm lens at f5.6. No image processing was performed other than setting the black point and a straight line contrast curve to the white point.
Images





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David Hume on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 30/11/2025
Comment posted: 30/11/2025
Marco Andrés on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 30/11/2025
Here’s an image of one made in Italy:
https://luf-jnet.b-cdn.net/uploads/monthly_2019_02/IMG_2712.jpg.fae87ba5ed23d62ef397d09739378000.jpg
There are many versions:
https://rangefinderforum.com/threads/leitz-ablon-versions.22239/
Today you can 3d print one or make one by hand.
3d printing
Comes in two parts for sandwiching 135 film with space for a wire to join the pieces together through the hinge
https://www.stlfinder.com/model/leica-ablon-style-film-leader-trimming-guide-de0zX8gP/1668745
Lomography has instructions on making a template by hand « Snip It Good: A DIY Film Leader Trimmer »
https://www.lomography.com/magazine/258701-snip-it-good-a-diy-film-leader-trimmer
Had a different experience with a iiig. Bought one years ago, Returned it since it had defects. Also just did not bond - usability issues: trimming the leader and it had that gnarly metal advance knob– not the standard lever or a thumbwheel advance like the Olympus Pen and Pen S. 3d printing could address the issue.
Comment posted: 30/11/2025
Curtis Heikkinen on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 30/11/2025
Comment posted: 30/11/2025
Eric Norris on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 30/11/2025
Comment posted: 30/11/2025
Gary Smith on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 30/11/2025
I really like your last shot "Restaurant Lanterns".
Thanks Geoff!
Comment posted: 30/11/2025
Ronen on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 30/11/2025
״This time it is fair to say low-light image detail was lost in high contrast scenes.״
The question is what will be the result in ID11, DDX or Rollei Supergrain. Rodinal is a tough guy. Love it or Leave it
Comment posted: 30/11/2025
Tony Warren on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 01/12/2025
I use FP4+ and Rodinal often and I have found 1:50 is my preferred dilution for a good tone range.
Comment posted: 01/12/2025
Scott Ferguson on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 01/12/2025
These are terrific shots. This makes me want to revisit FP4, which I tried out in my big B&W project of the spring/summer but maybe lost in the shuffle of all the other stocks I was looking at around the same time. I am a huge fan of the Summitar, which has been the main lens I use on my M3 since I bought it last December, even over much more heralded better known and much more expensive lenses in my collection. I think it has a really interesting mix of vivid color and contrast that feel pretty contemporary with enough personality to feel timeless/'lost photo', particularly when wide open. I'm seeing a lot of the people I like and respect enjoying shooting with Barnacks enough that it has rekindled my curiosity about those cameras -- I tried out a iiif at the same time I bought the Summitar, which I initially bought to test out the camera, but ended up keeping the lens and returning the camera. The combination of the tiny viewfinder and the fiddly film carriage soured me on the camera, despite loving the 'idea' of a Barnack as well as the looks. I lost more or less an entire roll to some kind of malfunction in the frame advance function. I think I did okay trimming the film, but may have missed a step in backwinding after the film was loaded onto the spools to get the correct tension. I haven't had those kinds of problems with the M3 and it's nice to be able to use both M mount and LTM with an adapter to get the best of both worlds optically, but who knows, maybe some day I'll revisit the Barnack era.
Best,
s
Comment posted: 01/12/2025
James Evidon on 5 Frames with a Leica iiig, Summitar and FP4+ at 400asa
Comment posted: 01/12/2025
Comment posted: 01/12/2025