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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.

learn more… | top users | synonyms

30
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9answers
84k 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?
6
votes
2answers
1k views

Can I use lens brand X on interchangeable lens camera brand Y?

I've got some lenses of brand X, but I've just got a new camera of brand Y. How can I tell if it's possible to use my lenses on my camera? I accept that I may lose a lot of automatic functionality ...
10
votes
3answers
17k 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 ...
18
votes
6answers
2k views

Where can I find the maximum lens weight for my camera?

Where can I find information about maximum allowed lens weight for my camera? I'm asking because I have an opportunity to get an old Soviet-built 80-200mm lens for my Nikon D3100 for a very ...
17
votes
4answers
2k 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 ...
4
votes
6answers
3k 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 ...
7
votes
3answers
2k 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 ...
7
votes
2answers
870 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 ...
4
votes
1answer
4k 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 ...
3
votes
1answer
154 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 ...
1
vote
3answers
3k views

How good are the EF-mount to E-mount adapters?

I currently live in the Canon ecosystem, but really like the look of the Sony a7S. But before I switch I want to know just how well I'll be able use use my old EF-mount lenses on my new a7S. How well ...
1
vote
1answer
2k views

Which lens-mount adapter do I need to buy to use a Sigma lens on a Nikon body? [closed]

I am a beginner and have been given a Sigma zoom 28-80mm f/3.5-5.0 macro lens. I would like to try this before paying out for a more expensive macro lens but it will not fit my Nikon D5000. Could any ...
7
votes
3answers
724 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 ...
1
vote
4answers
2k views

What exactly is focal length when there is also flange focal distance?

If focal length is the measure between the rear element and the sensor then how can you have different flange focal distances? Is the focal length not literally the measure between the rear element ...
13
votes
4answers
853 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?
8
votes
2answers
411 views

In what way does the lens mount limit the maximum possible aperture of a lens?

In many answers to questions about different aspects of really large aperture lenses it's pointed out that the lens mount sets a hard limit on the maximum possible aperture of the lenses to that ...
4
votes
2answers
512 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
4k 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
3k 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
3answers
2k views

Why no aperture control with Nikon 55mm f/2.8 AI-s on Nikon D3200

It was pretty exciting to borrow my dad's old Nikon 55mm f/2.8 AI-s and try it on my Nikon D3200. I have to use it in full manual mode, but it gets great results! Amazing how a lens designed in 1979 ...
1
vote
3answers
2k views

Difference between Minolta MC and MD mounts and can they be used on AF camera?

I am looking at some older lenses for sale. There are a lot of Minolta MC and MD mount lenses out there. Can they be used on an AF mount body at all (as a fully manual lens)? Will either of the MC ...
0
votes
2answers
340 views

Can Tamron 16-300mm Macro Lens fit to Canon EOS 600D?

I use Canon EOS 600D and I want a lens with a larger range. I found out Tamron 16-300 f/3.5-6.3 Di II VC PZD Macro Lens, I added it into my wishlist. I did some research on it and I'm scared that it ...
0
votes
1answer
622 views

“Lens not attached” appearing whenever I try to use my Nikkor 70-300mm?

I've had my Nikon D5000 for about two years now. It has never failed me! I have only two lenses, the standard 18-55mm lens and a 70-300mm lens I received about two years ago. I've never had a problem ...
6
votes
2answers
923 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?
14
votes
3answers
300 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
514 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 ...
6
votes
4answers
11k 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 ...
20
votes
4answers
6k 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 ...
10
votes
2answers
5k 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 ...
10
votes
3answers
20k 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 ...
4
votes
2answers
14k 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
2answers
481 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?
16
votes
5answers
6k 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. ...
10
votes
1answer
576 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 ...
5
votes
2answers
1k 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
2answers
177 views

What is the maximum aperture consistent with the Nikon F-mount?

In a related thread, it's been debated whether there is a hard limitation to maximum possible lens aperture; it seems there is none. However, using the example of the nikon F mount, this technical ...
4
votes
1answer
863 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
2answers
853 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 ...
2
votes
1answer
94 views

Are there any adapters for using EF lenses on FD mount?

I know there are various teleconverters and extensions rings that allow for the use of FD lenses on EF bodies. However I'm looking for an adapter that lets me use EF lenses on an FD mount. Of course I ...
1
vote
1answer
122 views
1
vote
2answers
158 views

Can I use these old lenses from DVT vision systems on modern cameras?

I have a bunch of old Tamron lenses (12mm, 25mm, 50mm, 75mm, etc) that were used on old vision systems (DVT Cameras). These systems are now obsolete and the cameras / lenses are being disposed of. Is ...
1
vote
1answer
876 views

Which adapter do I need to mount a vintage Marexar-CX Lens to Nikon D3100?

I have purchased a vintage MAREXAR-CX Zoom, MACRO lens, Multi-Coated 1:4.5-4.8 F=80-250mm 58 No 90686. It says is a Minolta fitting lens, made in Japan. I would like to try it out with my Nikon ...
0
votes
1answer
331 views

Can I adapt a Minolta AF-mount Tamron zoom lens for use on a Canon or Nikon DSLR?

I have a Tamron Minolta AF 28-300mm f/3.5-6.3 LD aspherical macro lens, which I would like to use on a Canon EOS 600D or Nikon D5200 DSLR. The lens was used on a film SLR Minolta camera. Is there an ...
0
votes
1answer
2k views

Is there an adapter for a Sigma SA mount lens to fit a Canon EF mount?

I have a Sigma 24mm ultra-wide lens; does anyone know of an adaptor that will make this lens fit my Canon 1V camera?