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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 16 Apr 2013 (Tuesday) 20:20
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Ltdave
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Apr 16, 2013 20:20 |  #1

besides the new 24-70 f2.8L USM, are there other Canon zooms with this?

my 17-55 f2.8 IS USM didnt have one. obviously there was zoom creep as it got loosened up but i dont see any need for this..

is there an underlying reason for creating and implementing this?




  
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alazgr8
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Apr 17, 2013 04:29 |  #2

I rented a 100-400 and you twisted the a ring to adjust the tension on the zoom. If you twisted enough it would prevent the barrel from moving. rick


Rick S.
My Gear = Canon 50d ~ EF 100 f/2.8L IS USM Macro ~ EF 100-400 f/4.5-5.6L IS USM ~ EF-S 17-55 IS USM f/2.8 IS ~ EF 70-300 f/4-5.6 IS USM ~ EF 28-135 IS f/3.5-5.6 IS USM

  
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slangford
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Apr 21, 2013 13:58 |  #3

The 70-300 DO IS also has it. It's there because these lenses can extend under their own weight (if you point it downwards, obviously!). I normally only lock them when I've finished shooting - otherwise it gets annoying having to unlock it all the time - you go for a quick shot, try to zoom and find that it's locked!

Steve




  
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MakisM1
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Apr 21, 2013 14:04 |  #4

The EFS 18-200 has a zoom lock at 18 to prevent zoom creep.


Gerry
Canon 5D MkIII/Canon 60D/Canon EF-S 18-200/Canon EF 24-70L USM II/Canon EF 70-200L 2.8 USM II/Canon EF 50 f1.8 II/Σ 8-16/ 430 EXII
OS: Linux Ubuntu/PostProcessing: Darktable/Image Processing: GIMP

  
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dannybres
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Apr 21, 2013 14:49 |  #5

The Tamron 17-50mm does too.


EOS 7D, EOS M, EF-S 17-55mm f/2.8 IS USM, EF 70-200mm f/2.8L IS USM, 430EX II.

  
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katvisman
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Apr 21, 2013 15:10 |  #6

The 70-300 IS USM also has it, but I haven't needed it yet (no zoom creep).




  
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