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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 12 Feb 2016 (Friday) 07:32
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50mm f/1.8 STM lens AF speed

 
Sibil
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Feb 12, 2016 07:32 |  #1

How does the 50mm f/1.8 STM lens AF speed compare with the other Canon 50 mm lenses, for shooting basketball?




  
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Bassat
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Feb 12, 2016 08:17 |  #2

None of Canon's 50mm lenses are known for their focus speed. I've had the 1.8c, 1.8II, and 1.8 STM. Nice sharp glass, stopped down to f/2.8. Focus speed, not so much. I've never used a 50L, but that lens' priority is certainly not AF speed.




  
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msowsun
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Feb 12, 2016 08:23 |  #3

The older EF 50mm 1.8 and 1.8 II are both faster with AF speed than the new STM version.

Video here: https://youtu.be/IHf6W​hei2fM?t=35s (external link)


Mike Sowsun / S110 / SL1 / 80D / EF-S 24mm STM / EF-S 10-18mm STM / EF-S 18-55mm STM / EF-S 15-85mm USM / EF-S 18-135mm USM / EF-S 55-250mm STM / 5D3 / Samyang 14mm 2.8 / EF 40mm 2.8 STM / EF 50mm 1.8 STM / EF 100mm 2.0 USM / EF 100mm 2.8 USM Macro / EF 24-105mm IS / EF 70-200mm 2.8L IS Mk II / EF 1.4x II
Full Current and Previously Owned Gear List over 40 years Flickr Photostream (external link)

  
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Bassat
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Feb 12, 2016 08:28 |  #4

msowsun wrote in post #17895358 (external link)
The older EF 50mm 1.8 and 1.8 II are both faster with AF speed than the new STM version.

Video here: https://youtu.be/IHf6W​hei2fM?t=35s (external link)

I agree with you, even without seeing the video. I still wouldn't use any Canon 50mm lens, wide open, for anything that is moving. Even less so if it is moving quickly.




  
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rebelsimon
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Feb 12, 2016 08:46 |  #5

I've owned the 1.8ii and the 1.8stm (and the old Sigma 1.4), and shot with the 1.4 and 1.2 (briefly). None of them are built for sports, but I'd probably take the new stm lens. It's not quick, but it seems more sure of itself than any of the others. As long as you're tracking your subject well, it'll keep up, at least until they're right in front of you.


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Frodge
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Feb 12, 2016 09:16 |  #6

The Stm lens is one that I may buy. The II, I own, and love the optics. Its just a sharp piece of glass. The af is not something o would buy the lens for.


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Bassat
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Feb 12, 2016 09:21 |  #7

Frodge wrote in post #17895401 (external link)
The Stm lens is one that I may buy. The II, I own, and love the optics. Its just a sharp piece of glass. The af is not something o would buy the lens for.

You are aware that Canon puts the exact same optics in both lenses, right? Different aperture blades, and focus motor, but the glass is identical the same in both lenses.




  
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JeffreyG
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Feb 12, 2016 09:48 |  #8

Contrary to comments here I find the 50L to have fast and accurate AF. That's the main reason I own it. I've used the lens for basketball, volleyball and diving.

The other Canon 50s are all bad at AF, but I have no experience with the STM.


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Frodge
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Feb 12, 2016 10:01 as a reply to  @ Bassat's post |  #9

I know it's the same optics. I like that it has a metal mount. That would be the only reason to buy from my personal perspective. My II copy is a really good one.


_______________
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05Xrunner
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Feb 12, 2016 10:53 |  #10

it has the same optics. but has better coatings on it so I have seen it handles flare much better on the STM plus the 5 vs 7 rounded aperture blades makes a nice difference


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Sibil
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Feb 14, 2016 08:53 |  #11

msowsun wrote in post #17895358 (external link)
The older EF 50mm 1.8 and 1.8 II are both faster with AF speed than the new STM version.

Video here: https://youtu.be/IHf6W​hei2fM?t=35s (external link)

Thanks for the link. It was very helpful.




  
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mwsilver
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Post edited over 3 years ago by mwsilver.
     
Feb 14, 2016 16:44 |  #12

Bassat wrote in post #17895410 (external link)
You are aware that Canon puts the exact same optics in both lenses, right? Different aperture blades, and focus motor, but the glass is identical the same in both lenses.

That is true, but the overall build of the STM is far better, and has a focus ring that is actually usable, and the 7 rounded aperture blades gives better results IMHO. The STM AF motor seems to be more consistent than the older version..


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mwsilver
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Feb 14, 2016 16:57 |  #13

Frodge wrote in post #17895465 (external link)
I know it's the same optics. I like that it has a metal mount. That would be the only reason to buy from my personal perspective. My II copy is a really good one.

The seven rounded aperture blades are also quite an improvement as is the usable focus ring and a very good locking hood. On my 7D2, AF accuracy is generally very good.


Mark
Canon 7D2, 60D, T3i, T2i, Sigma 18-35 f/1.8, 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM, Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, DXO PhotoLab, Elements 15

  
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Trad59
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Post edited over 3 years ago by Trad59.
     
Feb 26, 2016 03:48 |  #14

Depends...AF speed from mfd to infinity is slower, but...The STM AF doesn't hunt as much, is slightly better built, it's quieter, has improved bokeh and coatings. A couple of good reviews that might help:

http://blogdozack.com.​br …anon-ef-50mm-f1-8-stm-en/ (external link)
http://dustinabbott.ne​t …-ef-50mm-f1-8-stm-review/ (external link)




  
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msowsun
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Post edited over 3 years ago by msowsun.
     
Feb 26, 2016 06:40 |  #15

Trad59 wrote in post #17913517 (external link)
Depends...AF speed from mfd to infinity is slower, but...The STM AF doesn't hunt as much, is slightly better built, it's quieter, has improved bokeh and coatings. A couple of good reviews that might help:

http://blogdozack.com.​br …anon-ef-50mm-f1-8-stm-en/ (external link)
http://dustinabbott.ne​t …-ef-50mm-f1-8-stm-review/ (external link)


blogdozack.com said the STM is slower, and dustinabbott.ne says the STM is faster.

The STM is much better in Video mode, but in Stills mode the STM version is definitely slower than the old version.


Mike Sowsun / S110 / SL1 / 80D / EF-S 24mm STM / EF-S 10-18mm STM / EF-S 18-55mm STM / EF-S 15-85mm USM / EF-S 18-135mm USM / EF-S 55-250mm STM / 5D3 / Samyang 14mm 2.8 / EF 40mm 2.8 STM / EF 50mm 1.8 STM / EF 100mm 2.0 USM / EF 100mm 2.8 USM Macro / EF 24-105mm IS / EF 70-200mm 2.8L IS Mk II / EF 1.4x II
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50mm f/1.8 STM lens AF speed
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