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A lens mount is an interface, mechanical and often also electrical, between a photographic camera body and a lens. It is confined to cameras where the body allows interchangeable lenses.

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27
votes
9answers
51k views

What is the difference between EF and EF-S lenses?

This is specific to Canon, but what is the difference between EF and EF-S lenses?
20
votes
4answers
4k views

Are there drawbacks when using Panasonic lenses on Olympus Micro Four Thirds cameras?

I'm interested in trying out Olympus' new OM-D E-M5, and since I'm used to using a normal prime (and just spent some time using one on Fujifilm's new mirrorless EVF camera), I'd like to try that ...
16
votes
4answers
800 views

Is it dangerous to do a lens change with power on?

I have just accidentally changed my lens over with the power on. In the manual it lists this as something you shouldn't do as a 'caution' . Can this cause damage? If so, what and how will I tell? (I ...
14
votes
5answers
3k views

What's the difference between the Canon and Nikon lenses mounts?

I was wondering what, if any, are the technical differences between the two mounting systems. Does one auto focus faster? Can one hold more weight? Things along those lines that make them different. ...
13
votes
4answers
529 views

Does Canon make an L series lens with a plastic lens mount?

An online retailer is telling me that Canon 24-105 f4L lens comes in two versions, the USA model with a steel lens mount and an import with a plastic lens mount. Is this true?
12
votes
1answer
222 views

What lens design limits derive from the width of the lens mount?

I'm familiar with the lens design limitations imposed by the flange-to-focal-plane distance. But what constraints are caused by the width of the lens mount (that is, the size of the hole in the ...
11
votes
2answers
913 views

Removing rust from a lens's mount?

My wife gave me a used Pentax 50mm f/1.7 SMC-M for my birthday. (I know some people get Leica 50mm f/0.95 Noctiluxes for their birthdays, but, y'know, kids to take care of and so on. And it's a very ...
10
votes
3answers
12k views

Will lenses from a Rebel work on higher-model Canon cameras?

I am thinking about purchasing a Canon 60D and selling my Rebel XT and wondered if I would need to purchase new lenses? I only have two but as you all know, once you invest it is hard to not take ...
10
votes
1answer
390 views

How do I identify unknown thread mounts?

A local thrift store is selling a macro bellows with thread (screw) mounts. The mount is not identified. I have a cheap digital caliper. What are the likely mounts that it could be, and how can I ...
10
votes
2answers
429 views

Are there new digital cameras that my old zoom lenses from my analog Yashica camera will fit?

I have an old analog camera (Yashica) with a bayonet lock and several zoom lenses for it. All of that was very high quality at the time and I would like to re-use it for a digital camera. Are any such ...
8
votes
3answers
9k views

Are Canon EOS and Nikon DSLR lenses interchangeable?

Can we use the lenses from, say a Canon EOS 550D kit (Canon EF-S 18-55mm) with a Nikon DSLR D5000 for example) ? Also, is the reverse possible ? I'm looking at interchangeability between recent DSLR ...
8
votes
2answers
3k views

What are the electrical contacts in a Nikon F-mount?

Current Nikon camera bodies and lenses have electrical contacts. What exactly are they used for and what sorts of electrical signalling is used? Why are there so many? Some background to my ...
7
votes
3answers
628 views

Fast telephoto primes for APS-C mounts — would they make any sense?

I can see the benefit of designing and manufacturing a wide-angle lens specifically for APS-C sized sensors instead of full-frame sensors: you will get smaller, lighter, and cheaper lenses. But is it ...
7
votes
2answers
737 views

Pentax to Canon Adapter

My dad has an old Sears KS-2 + 50mm f/1.7, which from a bit of research seems to use a Pentax K-mount. I've looked around a bit and found a Pentax to Canon adapter, which says it supports ...
7
votes
3answers
272 views

How do I find out which Nikon film cameras will work with my newer G F-mount lens?

I want to pick up a film camera but I have a nice G lens (Tamron 17-50 f/2.8 with VC) and I'd really like to be able to use it. I'm having a hard time understanding which cameras will be able to work ...
6
votes
2answers
718 views

Are there any decent telescopes for around $250 that I can mount my Canon 60D to?

I am looking to buy a telescope for about $250, are there any at that price range that can be mounted on a Canon body?
6
votes
3answers
1k views

How does a short flange back distance improve image quality?

In the description for the new lens mount for their X-Pro series, Fujifilm says: 1: Specifically designed to maximize the mirrorless design of the body, the X-Mount has a short flange back ...
6
votes
4answers
6k views

Can I use Minolta Maxxum lenses with Sony Alpha cameras?

I have an old Minolta Maxxum 7000i AF-SLR camera from early 90s. I have a complete set of lenses, filters, etc., I found out that Sony ultimately ended up buying Minolta, and developing their alpha ...
6
votes
2answers
134 views

Can I intercept and interpret the autofocus signals sent to the lens?

I would like to use a Nikon D80 body with a reflecting telescope as the lens to take pictures of bright/textured objects in the night sky (e.g. the moon). The D80 has autofocus capabilities; the ...
5
votes
1answer
1k views

What are the advantages of metal mount vs plastic mount?

I have come across many reviews of lenses, in which reviewer will stress on the point that this lens has a metal mount. I am yet to buy a lens with metal mount, but what are the advantages of having a ...
5
votes
3answers
413 views

Why do camera manufacturers use different lens mounts?

If all manufacturers used the same mounts for their cameras then they could share lenses and focus more on improving optics, sensor technology and accessories instead of having completely separate ...
5
votes
2answers
1k views

Mounting a Canon EF lens on a Leica M body?

Is it possible to use existing Canon EF lenses with a Leica body with an M mount? I've seen various discussions in the Internet on this combination, but usually the other way round (mounting a Leica ...
5
votes
1answer
1k views

How do I remove a broken lens mount ring from a lens?

Today my Nikon d90 was drop with attached Nikkor 18-200mm lens. The lens detached from the body and ripped of the metal ring with screws from the body. How can I fix it? I don't know how to remove the ...
5
votes
5answers
1k views

Could an old Nikkor-P lens damage a DSLR?

Someone was interested in buying my D3000 body (I had upgraded and want to keep the lenses). He had a very old Nikkor-P lens, which seemed to fit onto my camera alright. But the LCD screen said "lens ...
5
votes
2answers
537 views

How loose can the lens mount be?

I've noticed that there is a little give in my camera system at the EF mount. It is really hard to see, but I can feel it sometimes and first noticed it when I had the lens attached to a monopod and ...
4
votes
3answers
375 views

Are fully automatic DSLR lens changers available? What are suitable alternatives?

Do portable fully automated DSLR lens-changers exist? If so, how well do they work and how do they compare with alternative solutions. I've seen many "lens bags" offered to ease the lens ...
4
votes
6answers
2k views

What are the advantages to using EF-S lenses on Canon APS-C cameras?

I know EF-S lenses are "optimized" for crop sensors but what are the exact advantages to using an EF-S lens? Does it give better color, sharpness, depth of field, etc...? In addition, do EF-S lenses ...
4
votes
3answers
3k views

Why isn't it safe to use EF-S lenses on fullframe?

I've heard that EF-S lenses are not compatible with full frame bodies and that using such lenses could damage the mirror. Are the EF-S lenses not compatible with full frame bodies in terms of "not ...
4
votes
2answers
655 views

Can I use my existing Canon lenses on an EF-M camera body?

Canon recently introduced the Canon EOS M, mirrorless interchangeable lens camera. It uses a new EF-M mount and is available as a kit with an EF-M lens in some regions. I have existing EF and EF-S ...
4
votes
2answers
3k views

Does using a lens adapter change focal length?

Does using a lens adapter change the field of view? I recently bought a Sony NEX-5, an extra Minolta MD 50mm 1.7/f lens and a MD to E-mount adapter and I was wondering, as the adapter increases the ...
4
votes
1answer
237 views

What is the reason to change the mount type in Nikon 1 series?

To use Nikon F-mount lenses, Nikon 1 series require an adapter. Moreover, the flash unit mount is a custom one too and it seems that there is no adapter at all, but maybe I'm wrong. What is the ...
4
votes
4answers
1k views

Can M42 lenses be mounted on Canon EF-S (with adapter)?

I have a Canon XTi (EF-S lens mount). Can I get an adapter to mount a Pentax M42 lens? If so, do I lose any functionality?
4
votes
1answer
2k views

Can I use the lens from Canon AE-1 on a Canon EOS 60D, with an adaptor maybe?

I have a Canon AE-1 (film) and I bought a digital slr camera Canon EOS 60D. I have lenses from the AE-1 camera, but I don't know if there are some adaptors to use so they fit in the 60D camera... any ...
4
votes
1answer
204 views

Is it possible to control aperture when using a mount-adapter?

While I'm interested in a mirrorless camera, either MFT or X mount, I'd like to adapt some of my extensive collection of SLR lenses to one such camera. While I know it will defeat some of the ...
4
votes
1answer
573 views

Is this Canon 70-200 F/2.8 IS II strap/sling attachment safe?

I received my 70-200 F/2.8 IS II today (YAY) and I knew it had a tripod ring, but I thought it also had camera strap attachment points on the tripod ring like some other heavy lenses do, but this one ...
3
votes
2answers
5k views

What's the difference between Canon EF-S and EF-M?

What is the difference with Canon EF-S and EF-M lens?
3
votes
1answer
76 views

Are there any official specifications regarding the torque for camera mounts?

I've been wondering why I've never seen any official specifications of the maximum allowed torque that can be exerted upon lens mounts. It seems to me like a very useful specification, but I can't ...
3
votes
1answer
79 views

What are the downsides of converting FD(n) lenses to EF mount?

Are there any downsides of converting an old FD(n) lens to the EF by means of actually replacing the mount with a EdMika or similar? The lens will become a manual focus and manual aperture control ...
3
votes
1answer
125 views

Which terms accurately describe the lens mount on a Canon 7?

I've gotten a used Canon Model 7 rangefinder camera from my grandfather. I'm given to understand that it's a reasonably cool old camera, and the 50mm/1.4 lens isn't too shabby either. I am ...
3
votes
2answers
110 views

What does fixed EXIF mean?

I'm buying a lens adapter for my new Minolta AF 500mm reflex lens and one that I have found specifically states that the EXIF is fixed at 50mm F1.4. I'm not sure what this means for my photos in the ...
3
votes
3answers
376 views

Is a small amount of play on the Fujifilm X-E1 mount normal?

I have a brand new Fuji X-E1 with the 18-55 zoom. The lens has the barest amount of play once mounted, rotating back and forth less than a half millimeter if I twist it firmly. I've had old Nikon film ...
3
votes
3answers
1k views

Can the lenses of a Canon EOS film camera be used on a digital one?

I have lenses from a Canon EOS rebel Xs film camera: 28-80mm f/4-5.6 II (diameter 58mm) and a Sigma 100-300mm f/4.5-6.7. I am thinking to buy a Canon Digital 40D and use these lenses. Will those ...
3
votes
1answer
2k views

Can I use an old Olympus-mount lens on a Canon DSLR?

What is the mount adapter I need to mount a Vivitar 28mm 1:2 No.22 (made by Kino, aka Kiron) lens on my Canon 600D? Is it the T/T2 lens mount? I used to mount this lens on my dad's Olympus OM-10. ...
3
votes
1answer
417 views

Are Konica and Minolta lenses interchangeable?

I have an old Konica FS-1 35mm SLR camera with quite a nice F1.8 lens on, but I'd like to use a different body (without a battery pounding auto wind on mechanism!). There seem to be plenty of Minolta ...
3
votes
2answers
434 views

Is it possible to mount Pentax lenses on Sony NEX with an adapter?

I wonder whether it would be possible to mount Pentax lenses on a Sony NEX, using an adapter. Are such adapters already available? Would it be possible to have automatic focus?
3
votes
1answer
251 views

What adapter do I need to mount a Konica lens on an Olympus E-520?

I bought a Konica Super Albinar MC auto zoom 1:4.5 F=80-200 mm no. 911485 55 lens for my E-520 Olympus camera. The adapter I already have does not fit and I desperately need to know what kind of ...
3
votes
1answer
2k views

How do I troubleshoot a Nikon D3000 'lens not attached' problem?

Recently my Nikon d3000 started the 'lens not attached' error. I have two lenses, neither of which work. I tried the lenses in another camera body, and they work fine. I have cleaned the contact ...
2
votes
2answers
227 views

What lens will fit a Canon 10D?

I got a Canon 10D from a friend, the camera doesn't have any lens so I've been trying to find lens for it online. The problem is that I'm no expert in photography, and very unsure of what lens would ...
2
votes
3answers
144 views

Why are there no DSLR cameras with protective curtains for lens exchange?

Reading this thread I got to think of why there are no DSLR bodies with protective curtain that extends (and by doing that spans over the entire mount) while changing lenses and then retract ...
2
votes
2answers
273 views

Is there a quiet, affordable Nikon F mount camera (for timelapse)?

I'm planning to set up a long-running timelapse system to capture the view from my new office building. The problem is, other people work near me, and I don't want to disturb them with camera sounds ...