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 ...
- 22.2k
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 ...
- 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 ...
- 176k
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-...
- 176k
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.
...
- 61
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 ...
- 14.8k
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 ...
- 23.4k
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 ...
- 144k
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 ...
- 176k
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 ...
- 176k
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 ...
- 21
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 ...
- 5,602
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 ...
- 33.3k
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 ...
- 33.3k
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 ...
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.
- 176k
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 ...
- 7,252
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 ...
- 27.1k
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 ...
- 33.3k
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 ...
- 33.3k
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