Linked Questions
12 questions linked to/from What is Nano USM and how does it compare to an STM or USM lens?
0
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3
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487
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Which image stabilization lens to get to replace canon kit lens?
I came into a Canon Rebel T7 with the 18-55mm kit lens without image stabilization.
Many of the photos I take are indoors with low light (museums, indoor architecture) and often with my earlier ...
2
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4
answers
3k
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How to know whether a Tamron lens is compatible with Canon EOS 60D?
I am trying to find a compatible lens for my Canon EOS 60D. A Tamron lens is my preferred option as I used to have one for my old Minolta when I used 35mm film. The motor in my EOS 60D is a USM. I ...
1
vote
1
answer
149
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Is USM lens suitable for static photos on canon 550d?
I am looking to upgrade the lens on my canon 550d. An EF-S 18-135mm f/3.5-5.6 seems to be an all rounder for my needs. But i am thinking if there is any compatibility issue or such with a USM compared ...
1
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2
answers
206
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Can I use a polarizing filter on a non-STM lens?
Almost every single review of an STM lens mentions the following:
The front end doesn't rotate while focusing, which is great for using
a polar filter.
Does this mean that I can't use a ...
1
vote
2
answers
2k
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Is there any adapter to mount older Canon EF lenses on a newer Nikon DSLR? [duplicate]
Before the question, here’s some background story: My uncle just brought me his old Canon EOS 100 that he cannot use anymore because there is nowhere where he can develop photos. I am not going to use ...
1
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1
answer
13k
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What is the difference between STM and USM in a lens? [duplicate]
What is the difference between STM and USM in a lens? What's the major difference?
Is this only for a Canon user, or Nikon, or else DSLR also having same types lenses?
What should I choose for day-...
0
votes
1
answer
1k
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Does a Ring-Ultrasonic EF-S lens require power to manually focus? (using with adapter)
Would the manual-focus-ring of a ring-ultrasonic EF-S lens (in particular the 17-55mm f/2.8 IS USM lens) focus even when the electronics are not working? Or would it require power to allow manual ...
3
votes
0
answers
508
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What are the different types of auto-focus motor and how do they compare?
What is the difference of ultrasonic motor, stepper motor, and electromagnetic drive?
Which one of these are lens-based or screwdrive?
What are the advantages of lens-based servo over screwdrive and ...
1
vote
6
answers
2k
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What would be a better lens, 40 or 50mm prime, for walk around? [closed]
I have a Canon EOS Rebel T5i/700D body, an EF-S 18-55 wide angle lens, a 70-300mm telephoto lens, and the kit lens that came with the body.
I am still building my lens collection and am looking for ...
49
votes
3
answers
396k
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What does STM mean on a Canon lens?
The Canon EF 40mm f/2.8 has a designation of STM on the lens. What does this mean? What are the advantages of having it and does it replace an older technology?
We have a terminology thread that ...
16
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5
answers
76k
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What is USM, and what are its pros and cons?
My Canon lenses have the designation USM on them, which I assume is for the same reason that they say "Ultrasonic". What does this mean, and why or why do I not want it?
199
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15
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134k
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What do all those cryptic number and letter codes in a lens name mean?
When looking at a lens name, there are a lot acronyms describing its features (often specific to the manufacturer).
Examples, Nikon:
Nikon AF-S DX 16-85mm VR f/3.5-5.6G IF-ED
Nikon AF-I 600mm f/4D ...