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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 13 Apr 2011 (Wednesday) 19:16
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1D Mark IV DOF Button...

 
vinnie6756
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Apr 13, 2011 19:16 |  #1

Can some one tell me if the DOF button is supposed to move freely and have a sort of spring effect when depressed? When I push mine, it doesn't feel like the one on my Mark III and I'm wondering if there is something broke inside or if this is the way it is supposed to be.

Thanks!!




  
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*Knowledge*
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Apr 13, 2011 19:46 |  #2

Mine is pretty solid Vince. Kinda like a longer FEL button in terms of kickback.


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KenTT
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Apr 13, 2011 19:50 |  #3

Mine feels about the same as my mkIII did, from memory


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vinnie6756
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Apr 13, 2011 19:51 |  #4

OK...because my Mark III has a "spring" effect to it and I was just wondering if something was wrong. I put my new 85L on the camera, stopped it down to 1.2, focused, and then hit the DOF button but nothing happened. Shouldn't I have seen some thing in the view finder though??




  
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sportsshooter50
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Apr 13, 2011 20:05 |  #5

Isn't f1.2 the widest opening for that lens?




  
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MARK1992
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Apr 13, 2011 20:07 |  #6

vinnie6756 wrote in post #12217177 (external link)
OK...because my Mark III has a "spring" effect to it and I was just wondering if something was wrong. I put my new 85L on the camera, stopped it down to 1.2, focused, and then hit the DOF button but nothing happened. Shouldn't I have seen some thing in the view finder though??

It's wide open already. Pushing the DoF preview would do nothing.




  
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vinnie6756
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Apr 13, 2011 20:16 |  #7

OK...since I'm not to familiar with this button, I need to be at f/16 to see if this button actually works?




  
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MARK1992
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Apr 13, 2011 20:20 |  #8

vinnie6756 wrote in post #12217316 (external link)
OK...since I'm not to familiar with this button, I need to be at f/16 to see if this button actually works?

Nope. At f/1.4, there should be change. Whether visible / noticeable, that is the question. :)




  
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oldvultureface
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Apr 13, 2011 20:21 as a reply to  @ vinnie6756's post |  #9

Set your aperture to something other than wide open. Look into the front of the lens and push the button. If it's working, you should see the lens aperture blades closing. You'll also note the viewfinder darkening and the increased depth of field.




  
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vinnie6756
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Apr 13, 2011 20:36 |  #10

oldvultureface wrote in post #12217345 (external link)
Set your aperture to something other than wide open. Look into the front of the lens and push the button. If it's working, you should see the lens aperture blades closing. You'll also note the viewfinder darkening and the increased depth of field.

That's what I thought!! I just put it back on and stopped it up to f/16 and after some force, I was able to get it to work. However, I actually had to put so much pressure on it, it began to hurt my finger. I have to believe it should be easier than that. I put the lens on my Mark III and tried the DOF button and it is as smooth as silk. Looks like the Mark IV is going in for repair!!




  
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oldvultureface
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Apr 13, 2011 21:14 |  #11

vinnie6756 wrote in post #12217450 (external link)
... it began to hurt my finger...

I have three Canon bodies and none require undo pressure to stop down the lens. Definitely not normal.




  
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vinnie6756
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Apr 13, 2011 21:28 |  #12

Yeah...my other bodies are really smooth too!! I just checked my receipt too...purchased in January 2010!! Can't imagine how much this is going to cost to fix!!




  
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jase1125
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Apr 13, 2011 22:07 |  #13

Well since it is a POS broken camera I will buy it from you ;)


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apersson850
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Apr 14, 2011 00:50 as a reply to  @ jase1125's post |  #14

Just give it to me and I'll take care of it without any economical hassle.


Anders

  
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Vermin87
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Apr 14, 2011 00:56 |  #15

Well being a CPS gold member will help! 20% off repairs is a pretty substantial chunk of change.


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1D Mark IV DOF Button...
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