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30 votes
Accepted

Do all Canon DSLRs have in-body AF motors?

No Canon EOS body needs AF motors because every single Canon EF lens released since the EOS system was introduced since 1987 has a focus motor in the lens. Thus no Canon EOS camera has ever had a need ...
Michael C's user avatar
  • 175k
17 votes
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Are there entry-level DSLRs with built in autofocus motors?

There are three parts to the answer to this, which is appropriate, because with Sony, Olympus, Panasonic, Fujifilm, and Sigma focusing on mirrorless designs, there are really only three companies ...
mattdm's user avatar
  • 143k
16 votes

Do all Canon DSLRs have in-body AF motors?

No Canon EOS camera has an in-body focus motor. Canon's lens mount is 100% electric, there is no mechanical linkage. (Some mounts e.g. Pentax have a mechanical link for the aperture too, for some ...
crunch's user avatar
  • 996
6 votes
Accepted

Can I use a polarizing filter on a non-STM lens?

You can use a polarising filter on any lens. However, using a "directional" filter like a polarising filter or a graduated neutral density filter on a lens where the front element rotates when it ...
Philip Kendall's user avatar
6 votes

Do all Canon DSLRs have in-body AF motors?

No. All Canon EF lenses have in-lens motors. There is no need for an in-body AF motor. The Canon EF mount is designed to have no mechanical coupling of any kind—no aperture levers, "screw-drive" AF ...
bwDraco's user avatar
  • 5,936
5 votes

Are there entry-level DSLRs with built in autofocus motors?

Are there any entry level DSLRs with a built in autofocus motor? Both the D3300 and the Rebel T5 don't. None of the Canon EOS cameras, right up to the top-of-the-line 1Dx, have autofocus motors in ...
Caleb's user avatar
  • 31.7k
5 votes

Why does auto focus on my new Fuji X100F keep moving while I have the shutter button held halfway?

There is a small black slider on the side opposite the camera grip. It has 3 positions. If you slide it to the bottom it will be in AF-S mode which stops focusing as soon as autofocus locks after you ...
Itai's user avatar
  • 103k
5 votes

Why is the autofocus not working on my Canon EF 70-200mm f/2.8 L IS II USM?

Possible reasons why the AF on your EF 70-200mm f/2.8 L IS II lens isn't working: The AF/MF switch is set to MF (manual focus). You are attempting to focus an object at a distance from the camera, as ...
Michael C's user avatar
  • 175k
4 votes
Accepted

Does a Ring-Ultrasonic EF-S lens require power to manually focus? (using with adapter)

You can manually focus most, but not all, Canon USM lenses without any power supplied from the camera. In fact, you can manually focus them when they're not even attached to a camera. The EF-S 17-...
Michael C's user avatar
  • 175k
4 votes
Accepted

Focus motor problem in lens due to fine dust particles

Here’s what I did in the end: First of all, opening up the lens is not a good idea. It’s a complex and delicate system, and if you don’t have experience in this area, avoid disassembling the lens. ...
Ali Parsai's user avatar
3 votes

Is it possible to use a follow focus to add AF to MF lenses?

This looks like a video/cinema focus-puller's tool [albeit a budget one] Even the good ones will not snap focus like a stills camera's AF. They are meant to be 'smooth' not 'fast'. Even if you could ...
Tetsujin's user avatar
  • 23.4k
3 votes

STM vs Non STM lenses for still photography?

Canon introduced STM autofocus lenses primarily to resolve an issue that their previous Ultrasonic motors could not: smooth autofocus when shooting video. In still photography, focus occurs before ...
cmason's user avatar
  • 14.8k
3 votes

Do these Sony bodies have integrated AF motors?

Sony has made this super confusing by using alpha (α) —which is commonly rendered "A" — in the names of these E-mount cameras. (Thanks, Sony!) The current scheme seems to be: α followed by two digits ...
mattdm's user avatar
  • 143k
2 votes

Canon EF 50/1.4 USM Focus Ring Moves During AF: Normal?

When autofocus goes to minimum or maximum focus distance, the focus ring will turn a bit. Is this normal? Not really. The external ring should not move at all when the AF motor is moving the lens ...
Michael C's user avatar
  • 175k
2 votes
Accepted

Canon EF 50/1.4 USM Focus Ring Moves During AF: Normal?

The Canon 50mm f/1.4 has a feature called full-time manual focus (FTM) : you can use the ring while your camera/lens is focusing (in AF mode). You don't have to switch to Manual Focus to manually ...
Olivier's user avatar
  • 4,183
2 votes

What is Nano USM and how does it compare to an STM or USM lens?

One feature not mentioned above is the ability of the new lens to connect to the Canon Power Zoom Adapter PZ-E1. As it was explained to me, this adapter allows videographers the opportunity to zoom in ...
daninmich's user avatar
2 votes
Accepted

What is the difference between STM and USM in a lens?

STM is an acronym for Stepper Motor. USM is an acronym for Ultrasonic Motor. The specific STM and USM nomenclature is strictly Canon, but other lens makers have similar terms for the USM concept, as ...
Michael C's user avatar
  • 175k
2 votes

STM vs Non STM lenses for still photography?

Maybe, maybe not. It all depends on the two lenses in question. If compared to the previous non-STM versions of the same lens series, there is often a benefit in terms of faster autofocus and ...
Michael C's user avatar
  • 175k
2 votes
Accepted

Would the Nikon Dandelion Chip give AF Confirmation on bodies without AF Motor?

The 28-80 has everything your D5200 needs to function in manual mode, including focus confirmation. AF-S or AF-I are required for the body to focus the lens, but the parts that determine whether or ...
Blrfl's user avatar
  • 5,562
2 votes

Focus motor problem in lens due to fine dust particles

No, there is nothing you can do yourself. This is one of those cases of, "if you have to ask, then you don't know enough about it to do it yourself". The lens needs to be sent to Sigma (or a Sigma ...
scottbb's user avatar
  • 32.8k
2 votes

Is it possible to use a follow focus to add AF to MF lenses?

No. At least not in any of the current DSLR and mirrorless camera systems (Canon, Nikon, Pentax, Sony, etc.). Their autofocus sensors are not exposed to any APIs or control over USB. Conceivably, it ...
scottbb's user avatar
  • 32.8k
2 votes

Is it possible to use a follow focus to add AF to MF lenses?

I advise against asking if things are possible and instead asking if they would be practical and convenient. The most practical way I know of leveraging a camera's autofocus system with a manual ...
Laurentiu Cristofor's user avatar
1 vote

What part of Canon 50mm f1.4 is responsible for failure to autofocus?

If you've touched the focus position sensor brushes with your bare fingers you're very likely going to need to replace them. Please remember to wear gloves and grounding straps when handling them.
Michael C's user avatar
  • 175k
1 vote

Is it possible to use a follow focus to add AF to MF lenses?

What might suit your needs is a gadget colloquially called a techart adapter - this is a motorized helicoid adapter that converts Sony-E/NEX to LTM mount, and can be used with something-to-LTM ...
rackandboneman's user avatar
1 vote

Can I use a polarizing filter on a non-STM lens?

Does this mean that I can't use a polarizing filter on non-STM lenses? You can use a polarizing filter on any lens. See Philip Kendall's answer for details. STM refers to the type of motor used in ...
xiota's user avatar
  • 27k
1 vote
Accepted

Does the sony slt a35 have an in body focus motor?

Yes, the SLT a35 has a focus motor in the body. You can use legacy A-mount lenses, such as Minolta lenses since 1986, and non-SAM (Smooth Autofocus Motor) and non-SSM (Super Sonic wave Motor) lenses ...
scottbb's user avatar
  • 32.8k
1 vote

Can Nikon AF-S or AF-P lenses with broken AF motors be autofocused with bodies that have a built-in motor?

AF-S and AF-P lens have their own autofocus motors; AF-S have Nikon's "Silent Wave Motor"; AF-P lenses have a "Pulse" stepper motor. From Nikon's product pages for AF-S and AF-P ...
scottbb's user avatar
  • 32.8k
1 vote
Accepted

What are the (dis)advantages of moving the entire lens for focusing vs. only parts of it?

Disadvantages, well speed and potentially (depending on the distance needed) the TECHART PRO may run out of space making some lenses focus extremities unavailable. Larger heavier lenses may be to ...
den miol's user avatar
  • 227

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