22
votes
Accepted
What is this old 50mm f/1.9 lens?
Your lens is a Yashica ML 50mm f/1.9. The one pictured below is a more recent version of the same lens.
The mount is the CONTAX/Yashica mount. Yashica revived the Contax name over a decade after ...
- 175k
17
votes
Accepted
How do SLR lenses connect to the body?
if I use the auto-focus, does it adjust the lens focus, or is there a secondary lens in the body that gets adjusted?
No, there's no secondary lens. The lens attached to the camera contains a motor ...
- 31.7k
15
votes
Does a large mount diameter really allow design advantages for large aperture lenses?
First: Sony doesn't necessarily disagree with Nikon's claim. It's just that Sony designed their 'E' mount with a throat diameter of 46.1 millimeters at a time when it appeared it would be an APS-C ...
- 175k
14
votes
How to fix a bent lens mount hook/tab?
The first thing you need to ask yourself is, "Am I sure the only damage to the lens is to the mounting flange?"
The second thing you need to ask yourself is, "Considering the cost of a new EF 75-...
- 175k
10
votes
How to fix a bent lens mount hook/tab?
Check if you can somehow get this replaced/repaired for free by some expert due to warranty, insurance, etc. That would be the best solution.
Find out the price that an expert repair costs or at least ...
- 8,504
10
votes
Does a large mount diameter really allow design advantages for large aperture lenses?
Using your thumb and forefinger on each hand, make a finger frame, and hold it out at arms length.
Now imagine that your entire field of view is limited by the bounds of this finger frame. Anything ...
- 32.3k
9
votes
Accepted
Can I use a Sigma 17-55 2.8 lens on a Canon 6D?
Will the sigma 17-55mm 2.8 lense fit my full frame canon 6d ?
The lens that I think you're talking about is the Sigma 17-50mm f/2.8 EX DC (OS) HSM. Although any lens with an EF mount will fit your 6D,...
- 31.7k
9
votes
What is this old Zeiss Tessar lens, with a large mount ring with six holes?
This is a "process" lens used to make copies on high contrast film for reproduction in newspapers, magazines, and books. The lens mounted on a square wood board with hole for the lens. The lens ...
- 38.7k
8
votes
How do SLR lenses connect to the body?
As Caleb pointed out, all focus and aperture-related functions (as well as optical zoom when relevant) happen inside the lens, not in the body (in terms of lens components moving at least, not talking ...
- 317
8
votes
Accepted
What makes RF lenses better than Canon's EF lenses?
Like most mirrorless systems, the RF mount has relatively short flange focal distance, of only 20mm, as opposed to 44mm of EF (and EF-S). This has a number of optical advantages, better allows for ...
- 143k
7
votes
Accepted
Are lenses for Nikon's D5xxx series compatible with the D7xxx series too?
Short answer: Yes. The models all have DX sensors, and since the lenses were bought for a D5300/D5200, they'll likely have an AF motor built in, so you won't have problems mounting them on any other ...
- 186
7
votes
If my Nikon DSLR camera came with a non-VR lens, do I need to buy a new camera to use VR lenses?
Your camera is an interchangeable lens camera. You can buy other lenses with the Nikon mount and use any of them. That includes lenses with VR — vibration reduction — even if the lens which came with ...
- 143k
7
votes
What lens mount does my Fujinon135 f/3.5 lens have?
X-Fujinon says it all - that's Fujica X-mount, the one Fuji used on their SLR cameras from the early 1980s, before current mirrorless X-mount.
Fujica X-mount has focal flange depth of 43.5mm, so ...
- 416
7
votes
APS-C lenses on full frame Mirrorless bodies
Since the adapter moves the lenses further from the sensor, I’d imagine that the coverage of the lens would be larger, and that the adapter or body alters focus to compensate. Is this thinking correct?...
- 175k
7
votes
Nikon 18-300mm will not mount to body
I just found the issue, upon closer examination of where on the ring it was not seating, ONE slightly loose screw! Hope this helps someone else!
- 121
6
votes
Where can I find the maximum camera weight for my lens?
It's not just the weight of the camera that's a concern, but the torque that it will apply to the mounting ring on the lens (and in the camera, of course).
Torque is turning force, and it's ...
- 31.7k
6
votes
Accepted
Will a DX lens have severe vignetting on a 20x20mm?
The only guarantee is that a DX lens will throw an image circle approximately large enough to cover a DX sensor. Some throw them a bit larger, but the only way you'll know if a given lens does that ...
- 5,532
6
votes
What mount system is this Hanimex zoom lens?
This lens was manufactured in the Canon FD (and new FD), Nikon F, Minolta M/MD, Pentax K, Fujika FX, CONTAX/Yashica (C/Y or Y/C), Konica AR, Olympus OM, and M42 mounts. Your lens is not any of those.
...
- 175k
6
votes
Can I adapt an E-mount rectilinear lens on a micro four thirds body?
I would suggest looking into a shift or tilt-shift adapter, to mount say a wide-angle Canon EF or Nikon AF-S lens. This way, you have a much wider selection of regular lenses to choose from than just ...
- 32.3k
6
votes
Why are all the mirrorless full-frame 35mm f/1.4 lenses so big?
Non-retrofocus, close to the "thin lens equation", strong wide angle designs (where the light comes in wide angle and goes out wide angle) are known to be tricky and unreliable in their results when ...
- 7,182
6
votes
Accepted
What is the breech mount on this Hanimex lens?
Your lens likely has a Canon FD mount. The reasons are as follows:
It has a breech mount. Canon FL/FD lenses are among the most well-known breech-mount lenses.
The location of the linkages matches ...
- 26.9k
6
votes
What is this mount with two buttons on side of Vivitar 75-205mm lens?
I believe this is an Olympus OM mount lens. The lens release button and aperture stop-down button opposing each other are a dead giveaway. Also, unless I'm mistaken, the engraved lettering in the ...
- 32.3k
6
votes
Accepted
Does a camera have to have a contiguous housing?
You need to differentiate the camera, on where the sensor or film resides and the optical elements. This can be either lenses or mirrors.
A mirror telescope is a good example of an open structure. ...
- 24.1k
6
votes
Accepted
APS-C lenses on full frame Mirrorless bodies
The EF-S to RF adapter is only possible because of the very short Flange focal distance of 20mm of the RF mount compared to the 44mm of the EF and EF-S mounts.
The adapter places the EF-S mount lens ...
- 12.2k
6
votes
Accepted
How do sensors "focus" on the bottom of the lens (flange distance)?
I am wondering how is it that the sensor "sees" the image when it's projected and focused on to it while it doesn't pick up a sharp image of a tiny object or my finger if I'll touch it (...
- 2,758
5
votes
Are Canon Rebel T3 lenses compatible with Canon T6i?
Yes, any lens that works on your T3/1100D will also work on a T6i/750D.
But here's something you may want to consider: When selling your old T3 you might have a hard time selling just the body. Most ...
- 175k
5
votes
Accepted
Is there a way to adjust the aperture of a Nikon lens without a camera or physical aperture ring?
Ultimately, we decided to use a Nikon BR-6 Auto Diaphragm Ring combined with a BR-2A Lens Reversing Ring, plus a Nikon AR-10 cable release for setting the aperture.
This was the setup: A Nikon lens (...
- 91
5
votes
Are lenses for Nikon's D5xxx series compatible with the D7xxx series too?
The D5300 requires lenses that have a built-in motor ( in the lens ) in order to autofocus. Nikon lenses that are suitable will all have the designation "AF-S". Be careful when looking at non-Nikon ...
- 6,385
5
votes
Accepted
What is this lever for on the lens mount? (F-mount, not aperture lever)
The extra lever is the "Maximum Aperture Indexing Lever" or "Lens Speed Indexing Lever". It was added on some AI-S lenses to transmit the maximum aperture information to the camera body.
It was only ...
- 12.2k
5
votes
What adapter do I need to mount lenses for Chinon CM-5 on my Canon EOS 1100D?
The Chinon CM-5 uses a Pentax K mount and there are adapters available for about $15 to mount these lenses on your Canon 1100D.
Mike Butkus Camera Manual Library
Fotodiox Adapter
- 12.2k
Only top scored, non community-wiki answers of a minimum length are eligible