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Questions tagged [lens-mount]

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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43 votes
9 answers
132k 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?
CodeToGlory's user avatar
  • 2,291
30 votes
6 answers
22k 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 ...
Philip Kendall's user avatar
26 votes
4 answers
16k 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 ...
mattdm's user avatar
  • 143k
21 votes
7 answers
6k 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 ...
Sergey Matvienko's user avatar
19 votes
5 answers
10k 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.
Elfudge's user avatar
  • 195
18 votes
2 answers
3k 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 ...
Hugo's user avatar
  • 8,288
18 votes
4 answers
6k 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 ...
Joanna's user avatar
  • 181
15 votes
3 answers
15k 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 question. ...
RedGrittyBrick's user avatar
15 votes
3 answers
585 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 ...
James Youngman's user avatar
14 votes
3 answers
38k 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 ...
Abhinav's user avatar
  • 447
13 votes
4 answers
1k 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?
Gary's user avatar
  • 131
12 votes
3 answers
38k 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 ...
user avatar
12 votes
2 answers
83k views

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

What is the difference with Canon EF-S and EF-M lens?
user avatar
12 votes
3 answers
5k views

Does a large mount diameter really allow design advantages for large aperture lenses?

To keep the conversation simple, please focus only on native lens design for the mount. So with the recent Nikon mirrorless announcement, Nikon has been touting the bigger mount. I am no expert in ...
georgekhaidas's user avatar
11 votes
1 answer
2k 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 ...
coneslayer's user avatar
  • 7,406
11 votes
2 answers
755 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 ...
txwikinger's user avatar
  • 2,937
11 votes
2 answers
4k 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 ...
mattdm's user avatar
  • 143k
10 votes
3 answers
3k views

How do SLR lenses connect to the body?

I recently bought my first SLR camera and lens for it and I have questions about how they interact. My lens attaches on, and I can use the focus on the lens itself, but if I use the auto-focus, does ...
Antony D'Andrea's user avatar
10 votes
3 answers
7k 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 ...
GoodSp33d's user avatar
  • 821
10 votes
3 answers
30k 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 ...
Jørgen's user avatar
  • 233
8 votes
1 answer
3k views

What is this old 50mm f/1.9 lens?

I purchased this lens for $5 at a thrift store. It's fully functional and the glass seems in good condition, however, I cannot identify the mount or the lens (the front name ring is missing). When I ...
MicroMachine's user avatar
  • 1,491
8 votes
4 answers
8k 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-...
mattdm's user avatar
  • 143k
8 votes
5 answers
24k 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 ...
CMR's user avatar
  • 183
8 votes
3 answers
1k 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 ...
Jukka Suomela's user avatar
8 votes
3 answers
12k 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 size-...
Itai's user avatar
  • 103k
7 votes
4 answers
30k 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 ...
Ross Anderson's user avatar
7 votes
6 answers
3k 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 ...
Catwoman3's user avatar
7 votes
4 answers
2k views

How do I separate a stuck Nikon 400mm f/2.8 AF-S (non-VR) lens from a D800E body?

I purchased a factory refurbished 400mm f/2.8 AF-S (non-VR) lens a year ago from Nikon USA. Two major malfunctions happened. To me, both seem to be related to a little metal lever inside the lens's ...
Joseph Myers's user avatar
7 votes
2 answers
2k 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 ...
Hugo's user avatar
  • 8,288
7 votes
2 answers
1k 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 af-...
chills42's user avatar
  • 23.7k
7 votes
1 answer
5k 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 ...
Thomas's user avatar
  • 73
7 votes
3 answers
2k 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 ...
Chandler's user avatar
  • 716
6 votes
4 answers
5k views

How to fix a bent lens mount hook/tab?

I dropped my lens and it got bent at the little metal hooks/tabs that latch it to the body. Is there any way to fix this kind of damage (see image)? You can see the bend to the left (the hook is ...
mts's user avatar
  • 61
6 votes
2 answers
481 views

Are lenses for Nikon's D5xxx series compatible with the D7xxx series too?

I wonder if the lenses that were used on D5300 and D5200 are also compatible with the D7000 and D7100? I am going to buy the body and lenses separately and I want to be sure I am buying the correct ...
Arkadi's user avatar
  • 353
6 votes
2 answers
1k 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?
JD Isaacks's user avatar
  • 1,153
6 votes
4 answers
4k 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?
Ken's user avatar
  • 5,088
6 votes
4 answers
4k views

How can I increase the flange focal distance (back focal length) of DSLR lens?

I am working on a custom setup where I am using a DSLR lens (Canon 50mm f/1.8) to project an image onto an image sensor (image plane). For my application, I require a very large distance between the ...
Zythyr's user avatar
  • 161
6 votes
2 answers
253 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 ...
Jono's user avatar
  • 249
6 votes
4 answers
2k views

What is the Canon PE Mount?

I was exploring the internet this evening and came across an article on the even rarer then the 1200mm; the Canon PE 300mm f/1.8. Original PetaPixel article Now although the article says the lens ...
Crazy Dino's user avatar
  • 4,854
5 votes
3 answers
1k 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 ...
damned truths's user avatar
5 votes
4 answers
1k views

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

I have a somewhat unique question here, and I haven't been able to get a clear answer elsewhere. There is a question with a similar title, only with the camera and lens terms swapped. My question is ...
jrista's user avatar
  • 70.7k
5 votes
2 answers
2k 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 ...
chgeuer's user avatar
  • 51
5 votes
2 answers
42k views

Is it possible to use the lenses from a Canon Xl1 on a modern DSLR?

I have a Canon XL1 interchangeable lens video camera. Can I use an adaptor to use its lenses with a DSLR or an SLR? I know about it using a smaller sensor and that it is closer to the sensor (as in Is ...
Filmfox's user avatar
  • 51
5 votes
2 answers
4k 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 ...
dpollitt's user avatar
  • 46.5k
5 votes
1 answer
117 views

Nikon 18-300mm will not mount to body

My Nikon 18-300mm ED DX suddenly no longer mounts to my D5500. White dots lined up, lens mount/unmount button depressed camera body turned off. I do not want to force the turn for it to click and lock....
Tonya Moon's user avatar
5 votes
2 answers
2k views

How can I mount a non-AI lens on a Nikon F4?

I can't figure out how I am supposed to mount a non-AI lens on a Nikon F4. I have read the instructions on MIR, but I can't figure out what they mean exactly. Remember to lift the meter coupling ...
Aram Hăvărneanu's user avatar
5 votes
2 answers
6k 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 ...
tenmiles's user avatar
  • 4,368
5 votes
2 answers
358 views

Are there strong visual clues as to whether a vintage lens is, or is compatible with, Nikon F mount?

I have a Nikon d7100, lens mount type F. I sometimes happen to be at a vintage / second hand market where there are some lenses that I'd like to try. I know autofocus and aperture might not work. ...
Nicola Sap's user avatar
5 votes
1 answer
3k 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 ...
Matthew Dresser's user avatar
5 votes
1 answer
672 views

Nikon D3200 lens flange has undocumented Button or lever

There is a button or lever located on the outside of the mounting ring, on the shutter release button side, lower quadrant of the ring. Mounted lenses, AF or AI do not make contact with this lever or ...
Edward's user avatar
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