The Discipline of One Lens

By Ken Davis

Life is too easy for photographers these days! We have wide-ranging, versatile zoom lenses. Those folk using phones also have a choice of focal lengths on many models. Now I usually have a 28/35/50 Tri-Elmar attached to a Leica M digital body. Firstly to enable me to change focal lengths quickly and also to avoid changing lenses and risk getting dust onto the sensor.

I bought an APO 50mm Summicron f2.0 a little while ago (used), at a ‘good’ price and decided to use just that on the camera. It then occurred to me that imposing this disciple would take me back to my first explorations into serious photography when my parents bought me a Praktica IV with a 50mm f2.9 Ludwig Meritar lens in 1965. (See my Praktica article for more information on this range of cameras).

This discipline Is good for you. There’s nothing original about this theme, many magazine and web articles suggest this approach rather than attaching a super-zoom to your camera. Many rangefinder photographers opt for the 35mm as their preferred focal length. For some reason this is my least favourite focal length. I do like a 50mm for the aspect it provides…

Photos from my First Praktica / Meritar

Below two photographs taken with the Meritar back in 1965/66. The first shows the view to Florence Colliery From Cocknage Wood in Stoke on Trent in 1967. While the colliery dominates the middle distance and you can see the industrial town of Longton beyond; the photograph always reminds me of how easy it was for us to get into countryside. We lived close to that colliery and the view from my bedroom window was of the whole workings but a little beyond was Cocknage Wood.

The second photograph is one of a pair. It is taken From the Queen’s Hall Balcony in Burslem looking over the town centre as it was in 1966. Of all the elements in this photograph the only thing that is the same is the old town hall on the right. The shops have all changed. In the distance you will see the misty outline of Shelton Bar Iron and Steel Works, long since closed and, of course, the cars and buses evoke a different age. This photograph was taken on Adox KB14, one of my favourite films, developed in Neofin. It is one of a pair taken to show the whole area. It was enlarged to 20X16 and no one would believe the quality of the result from that little Meritar.


If these interest you then please go and look at some archive photos of Stoke on Trent on my Flickr site. Anyway, enough of the nostalgia.

Photos from my latest 50mm APO Summicron-M

Below are some image I have taken more recently with the 50mm Summicron, reminding myself what can be done when limiting oneself this one focal length.

The Hydrangea: I could’ve framed this a thousand different ways but this arrangement appealed as it seemed to catch the bush while it was still colourful but past its best.

Chesterfield – Londis: while walking to the weekly Chesterfield Photographic Society meeting I tried to capture some night photos. It was also a good lesson in beating the Leica M11 into submission as it wanted to force everything to 18% grey! I under-exposed by 2 stops and occasionally put the camera in manual mode leaving the ISO at 1600.


Rock Face – Stoney Middleton: A café has opened in this Peak District village and we tried it for a birthday lunch. Outside is a steep rock face that seems to characterise the Southern Peak District. Again it was a question of framing and hoping the light would behave itself.

Model Night at Chesterfield Photographic: I thought I’d explore a different approach to everyone else. This professional model and photographer, Graham Curry visited the society and set up his props and strobe lights. He then explained to everyone how to set their cameras to use the strobes at their optimum. He was a bit surprised when I photographed him just using the natural light but his costume and prop seemed to suit a darker, Victorian feel to the set.

The Lenses.

At the top, you can see the 50mm Summicron attached to an M11 and the 50mm Meritar attached to a Praktica IVF, and below, the lenses on their own. The cameras show my latest main camera in 2025 and my main camera in 1965. I still like using my Prakticas but a Leica M of some sort is my more frequent companion.

Here are the two lenses and you can compare the size difference, the cost differences are immense!

In Conclusion

Limitation is good for the photographer. It has been good for me to return again to just shooting this one focal length. It has made me think about the composition and my viewpoint. I have enjoyed it, and I hope I have proved how versatile this one focal length can be, I have certainly reminded myself of this fact!

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About The Author

By Ken Davis
I have been taking photographs since 1965 using Praktica SLRs then Chinon SLRs then Nikon and now Leica M and R series but I have a considerable collection of cameras that get used for both B&W & colour work in addition to day to day use of digital cameras. My interests are recording the area around me, landscape and close up work and street photography.
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Comments

Sean Benham on The Discipline of One Lens

Comment posted: 30/12/2025

It has taken me years to figure out what my most used/desired focal length is. In the 1980s I was only shooting a Canon AE-1 with the 50/1.8 FD lens. I used this all through high school, college, and travels around the US and Europe. It always seemed just a tad tight for me, especially for travel, but not affording anything else at the time, it still gave me a ton of wonderful memories. Today my go to is 35mm focal length. Just need to use my legs to get closer, but it allows me to shoot indoors and capture landscape and cityscapes with just the right amount of distance. And ultimately the more compact my camera is, the more likely I'll take it with me, and primes can do that.
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Ken Davis replied:

Comment posted: 30/12/2025

Thanks Sean, it is down to one's 'eye' as to which fixed focal length suits you best and you tried the 50mm for a long time on many subjects. If I didn't go out with the 50mm my choice would be a 28mm.

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Gary Smith on The Discipline of One Lens

Comment posted: 30/12/2025

OMG! You have a weekly Chesterfield Photographic Society meeting? That's amazing! How many folks show up? I'd love to have a local group that met that often. Like you, I believe the first/only lens that I started with 50+ years ago was a 50/1.4. As zooms got better and I have accumulated more (and varied) bodies I always add a 50 or 50-equivalent. Recently I picked up a D700 which eats batteries so I added a D810 to given me the same Nikon optical VF. I then had to chase down a 50/1.4 for it as well. I tend to have a medium zoom on the cameras that I grab the most. Today's zooms are pretty good.

Thanks for your article Ken.
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Ken Davis replied:

Comment posted: 30/12/2025

Thanks Gary, you are right, modern zooms deliver first class results and I use a Leica / Panasonic 12mm-60mm f2.8 on the Panasonic Micro Four Thirds cameras I use a lot. It's just that sticking to one focal length is an almost cathectic excercise!

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Jeffery Luhn on The Discipline of One Lens

Comment posted: 30/12/2025

Ken,
Nice pix! I often shoot with a Rollei TLR or Zeiss folding cameras. No lens changes possible. Oh, how I wish I had one of those models with wider lens. My interchangeable lens choice is a Pentax 645N. The 35mm lens on that medium format is amazing. But to your point, a single lens is a good way to limit yourself. It makes you think.
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Ken Davis on The Discipline of One Lens

Comment posted: 30/12/2025

Thank you Jeffrey, it is fun to exploit just one focal length to the max isn't it.
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Omar Tibi on The Discipline of One Lens

Comment posted: 30/12/2025

Excellent article Ken! I completely agree, limitation sparks creativity, and mastering a single lens will give you better photos, than haphazardly switching between different lenses or zoom lengths. I recently did something similar with my trip to Istanbul, using only a 50/1.4 Planar for my Contax SLR, which I wrote about here:
https://www.35mmc.com/02/11/2025/5-frames-planar-ektar-fotograflar-istanbul-in/

Also agreed about 35 vs 50mm FL. I see 35mm keep getting praised, especially on social media, but I also find 50 to be a more comfortable FL. It's more flexible & natural in my opinion, and I generally find myself wanting to go tighter than wider. I've tried 35 via my 35-70 Vario-Sonnar, and there are certain circumstances where it is useful, but I prefer 28 for wide. In that case though, I basically use that lens as a combined 35 mm and 70 mm duo, either fully extended or retracted, I don't use the variable range much. Part of it is because it just seems to make sense, but also partially because I don't want to become a lazy photog :)

Nice to see some great Praktica shots, and happy shooting in the new year Ken!
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Ken Davis replied:

Comment posted: 30/12/2025

Thank you Omar, your view of the world in terms of focal length is similar to mine. I like you Istanbul photos.

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Omar Tibi replied:

Comment posted: 30/12/2025

Thank you very much for your kind comment Ken! I'm glad you enjoyed them. Happy shooting in the new year!

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John Eaton on The Discipline of One Lens

Comment posted: 31/12/2025

Hi Ken, First, like Gary, I'm very jealous that you have weekly meeting in Chesterfield, that's great! I very much appreciated your thoughts about having some discipline in one's photography as I too think it's important -- I started out with a Minolta Autocord in 1967 and, looking back, now realize what a good discipline that was. After that, once I began to earn some money, I moved on to a variety of SLR's and got increasingly lazy as zoom's gradually improved -- though I eventually swapped my Autocord for a Rolleiflex 2.8 (which, I'm pleased to say, my eldest grandson now puts to very good use!). Personally I've rarely used a 50mm lens that much and have always tilted toward the wider end -- like you, I use a 28/35/50 Tri-Elmar on my M10 M most of the time, but more recently I got a (used) Q2 M and have found the discipline of starting at 28mm for landscapes very rewarding (I do crop a few, but not as many as I thought I would when I first got it). Thank you for an excellent post!!
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Ken Davis replied:

Comment posted: 31/12/2025

Thanks John, it is good that our photographic club keeps going with about 30 turning up most weeks. I've never jumped down the Q route as I still prefer rangefinder viewing. I have a Rolleiflex E f2.8 that is old but in fine condition and I try to put at least one film a year through it although 6X6 isn't my favourite format.

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Andrew on The Discipline of One Lens

Comment posted: 31/12/2025

Strange- somehow I just don’t “get on” with 35mm focal length either. 40mm is great for me and it’s only 5mm tighter, but somehow it seems completely different!
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Ken Davis replied:

Comment posted: 31/12/2025

Yes Andrew, we all see the world in slightly different way! Thanks.

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Omar Tibi replied:

Comment posted: 31/12/2025

Completely agreed Andrew! It changes the story. 40-45 feels, to me at least, more like natural vision than wide. My Voskhod is 45 and it's a really fantastic FL.

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Ken Davis on The Discipline of One Lens

Comment posted: 31/12/2025

Isn't the 'natural' focal length that matches our vision about 42mm?
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Alexandre Kreisman on The Discipline of One Lens

Comment posted: 01/01/2026

Dear Kent,
First, I think the philosophy of one lens, one body is worth a lot when learning a new lens, especially nowadays with zoom that have a lot less glass and give different results depending on the body and it's firmware/software to convert into dng.
Not wanting to diminished your article the slightest, a few things though : 18% grey is the standard value for any light meter (a light grey) and in the case of an M as the light meter is roughly 30% ovale in the center of the viewfinder, it's normal that it would give you a bad reading depending on where those 30% are facing. You did the right thing going manual. A trick on digital M's is to point your lens to the place in the picture where there is light (or the place you want to light up) and half press the shutter button. you should see a tiny dot between the first 2 digits in the viewfinder, meaning the exposure is blocked and then just frame/focus and shoot.
Now, regarding the 50 APO, it's not just a 50 it's an apo. Apochromatic lenses. Meaning there is a coat of chemicals that was applied to one of the lens, giving you more contrast at the point of focus. It's best suited for for the range of f2-f4. This lens is surgical on film at f2, never tried it on a 50Mb Px, but i guess the result would be a sharp picture and what I like most of it is the transition between in and out of focus. For me this lens is made for proximity, street, portrait and so on. Also, Leica is one of the last (if not) producer that make glass the old way : the have lenses for correction (parallax, ....) which is why (part of) is so costly. Nearly all other producer, put the least amunt of lenses and correct with a software in the body. (don't know if it is relevant, but ...)
I recommend you to try the 50 for portraits head + waist maximum. At something between 3 feet and 6, with the light meter blocked on the face. I'm sure you'll see some gem comes out.
I just had a m11 monochrom in my hand and tried to take a portrait at 1,5 meter with a noct 0.95. I couldn't make a single shot that was in focus, tried a summilux too, better result, but still the patch has become so small and lost so much contrast, I definitely know it's not for me.
Tried the m-e also and much easier but so weird to have a rangefinder with ev.
What are your thoughts about focusing with the 50 apo on your m11 ?
Anyway, wish you the best for this new year!
Cheers
Alex
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Ken Davis replied:

Comment posted: 01/01/2026

Thank you Alex, you have written some sound advice. I have used the exposure lock facility on the M11 as I have on the MP 240 and M9 and also under exposed using compensation but the M11 still tries to move to 18% grey! Hence the switch to manual. In the age I learned my photography it was separate hand meters and totally manual exposure so I'm used to that, maybe there's another article - don't be lazy, switch off Auto metering and go manual!!! I've shied away from using the 50mm on portraits as I prefer the way the face is shown when a 75mm or 90mm is used. I'll give it a go in the future. I agree about the extremely fast lenses, I'm not sure my eyesight now could use the rangefinder to focus at 0.95 and I'd close down to f2 making the Noctilux a bit unnecessary. I don't think I'll be moving to the M EVF as I use the Visoflex on the M11. I've got a 400mm Noflexar that I mount on the M11 and the tilted Visoflex makes a very usable combination. The M EVF doesn't allow the tilt. Once again, thanks for the advice Ken

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Alexandre Kreisman replied:

Comment posted: 01/01/2026

You are welcome, didn't thought you were savvy in the manual mode, my mistake! I'm working for the moment for a camera shop and can use whatever I want to test which is a great bonus but over 5 month I've only tested 2 cameras. The reason is that I shoot primarily film, and the more I see the new camera full of (for me) unwanted gimmicks doesn't make me wants to try them. Even resolution wise, I'm more than happy with 18 and 24 MbPx, I do not see the reason in having more resolution, it is in fact one of the reason I moved to film, the result i was getting were far from what a human eye can perceive and for me were un natural, whilst film is for me poetry My favorite lens in the M collection is the 75 apo, however a lot of the time I'm close to the people i shoot, thus the 50 comes in handy! happy shooting Alex

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Ken Davis on The Discipline of One Lens

Comment posted: 01/01/2026

Alex, my idea of a job from heaven was to work in a camera shop .....................................but one starting in about 1965 and going through to 1980! However, it is good that you can try cameras without having to buy them. You are right, all the functions on modern cameras can get in the way of what you want to photograph. I appreciate aperture priority automation just from a speed point of view and rarely use anything else.
Regarding size of sensors, I was happy with 24 megapixels on an MP 240 and 18 megapixels on an M9. I have seen some stunning wall size prints from the M8 as well!
However, the 60 megapixels on the M11 can come in useful if I want to capture something that the 135 isn't long enough for and it's ability to recover shadow areas is useful. I have the 75 f1.4 and it's a big beast with the depth of field issues you raised about the Noctilux and I make do with the 75mm Summarit most of the time.
Let's see what 2026 offers in terms of photo opportunities!
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Alexandre Kreisman replied:

Comment posted: 01/01/2026

Lets! And thank you for answering my question. Sometimes, I'm so lost in film and my kind of camera (my favorite is the M2), that I forget about aperture priority. Guess I'm so used to do it in my head and focusing on my subject ... But you are right even the M8 could produce sufficient resolution to make a big print. I see your point now, personally I was never ever able to make the focus on the 135 whereas I have no issue shooting a noct at 1.2 ! I wished Leica would have made a 100 apo at f2, the 2.8 is just a stop but in dim light with 400 iso it's hell! cheers Alex

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