dfarina Member 176 posts Joined Apr 2003 More info | Jan 22, 2012 11:25 | #1 I just picked up one of these lenses,really impressed so far.One thing I noticed is strange manual focus operation,and wasn't sure if there is something wrong with my lens?With previous lenses I owned in manual focus I would just focus and hit the shutter and it was done.With this lens it seems to require a focus confirmation before the shutter will engage,if u don't get that confirmation the shutter will do nothing.Is this normal operation for this lens?
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Jan 22, 2012 14:06 | #2 Is your lens set to AF or M? Is your camera set to one shot or servo?
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Jan 22, 2012 14:58 | #3 Lens is in the manual position,camera one shot.
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Jan 22, 2012 15:55 | #4 My shutter always fires with the lens set to M. Though sometimes I do get the beep.
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Strange,when in M focus if the focus ain't correct I can push the shutter all day and it won't fire
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Solix Member 175 posts Joined Apr 2011 Location: SoCal (562) More info | I've used manual focus to get a softer shot at times and have nevever needed a focus confirmation to activate the shutter. In any case, seems more of a problem with the camera than it is with the lens. 60D + BG-E9 | 430EXII | Sigma 30mm 1.4 | Sigma 17-50mm 2.8 OS | Sigma 70-200 HSM II | Fuji x100
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Nick3434 Goldmember  More info | Jan 22, 2012 16:36 | #7 I shot fireworks last night with my 17-50 all in manual focus after determining where it needed to be with no confirms or issues. I have only done manual focusing in m and av modes though, maybe if you are not in a manual mode it needs confirm? What mode are you shooting, maybe that is it? Everything is relative.
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Jan 22, 2012 17:49 | #8 At the end of the day it's not something I am going to use,but I would like to know in my head the lens is performing properly.
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oklaiss Senior Member 471 posts Joined Nov 2011 Location: San Francisco, CA More info | Jan 22, 2012 19:59 | #9 What mode are you using the camera on? Manual, AV, P, or one of the preset modes.... 5D Mark II Gripped, 60D Gripped, 450D, 24-105 f/4L, 85 1.8, 70-200 f/4L IS, Nifty Fifty, 28 1.8, B+W/Lee/Cokin/Hitech filters, 430ex II x2
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Jan 22, 2012 21:07 | #10 It doesn't matter what mode,it does the same thing.It bugged me enough to take it in to my local camera store,they told me its performing as it should so I left it at that.At the end of the day having focus confirmation in MF aint a bad thing.
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StructuredAmazing Senior Member  603 posts Joined Jul 2010 More info | Jan 22, 2012 21:20 | #11 dfarina wrote in post #13748044  I just picked up one of these lenses,really impressed so far.One thing I noticed is strange manual focus operation,and wasn't sure if there is something wrong with my lens?With previous lenses I owned in manual focus I would just focus and hit the shutter and it was done.With this lens it seems to require a focus confirmation before the shutter will engage,if u don't get that confirmation the shutter will do nothing.Is this normal operation for this lens?
Maybe its still on AF mode on the lens... "Yea, though I walk through the valley of the shadow of death, I will fear no evil"
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(24Lii, sigma 50A, 135L), and for the other ends of the spectrum, sigmaEX 14mm2.8 and sigmaEX 100-300F4.
