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Manual Focusing
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Jun 26, 2015 13:43:34   #
John_F (a regular here)
 
This is a general question and I realize there will be variations amongst different cameras. Here it is. If I have the camera set to any one of the various auto-ficus options, would I damage the lense mechanism by rotating the lens barrel in the event I am dissatisfied with the auto-focus result. Should the camera software reassert its focus.
 
Jun 26, 2015 14:02:55   #
Leitz (a regular here)
 
John_F wrote:
This is a general question and I realize there will be variations amongst different cameras. Here it is. If I have the camera set to any one of the various auto-ficus options, would I damage the lense mechanism by rotating the lens barrel in the event I am dissatisfied with the auto-focus result. Should the camera software reassert its focus.


Unless the lens has manual override, it or the camera could be damaged by trying to manually focus in auto focus mode. This will be noted in the lens' user's manual.
Jun 26, 2015 14:12:33   #
CHG_CANON (a regular here)
 
Very much a lens specific question for which there is no general answer.
Jun 26, 2015 14:12:37   #
Mac (a regular here)
 
John_F wrote:
This is a general question and I realize there will be variations amongst different cameras. Here it is. If I have the camera set to any one of the various auto-ficus options, would I damage the lense mechanism by rotating the lens barrel in the event I am dissatisfied with the auto-focus result. Should the camera software reassert its focus.


I think the variations are more amongst lenses rather than cameras. The lenses I have allow me to manually adjust in AF.
Jun 26, 2015 14:37:19   #
tradio (a regular here)
 
Another advantage of BBF.
Jun 26, 2015 14:54:20   #
n3eg
 
In micro four thirds, the lens ring does nothing if you MF when AF is on. You have to turn AF off to use it. No damage.
 
Jun 26, 2015 15:07:31   #
SharpShooter (a regular here)
 
Mac wrote:
I think the variations are more amongst lenses rather than cameras. The lenses I have allow me to manually adjust in AF.


It is a lens by lens issue, but ANY Canon L lens is Manual Enabled as are most of the Canon lenses but not all.
Also, NO Canon body can be damaged in any way by any lens, since Canon has NO mechanical AF lenses. ;-)
SS
Jun 26, 2015 15:12:08   #
SharpShooter (a regular here)
 
tradio wrote:
Another advantage of BBF.


Tradio, I don't see how BBF has anything to do with it?! ;-)
SS
Jun 26, 2015 15:38:44   #
tradio (a regular here)
 
SharpShooter wrote:
Tradio, I don't see how BBF has anything to do with it?! ;-)
SS


With BBF, the auto focus only activates when the back button is depressed. If you want to manual focus, just don't press the back button.
You have auto focus at the touch of a thumb or if you want manual, let off the button and focus away.
Jun 26, 2015 16:26:36   #
SharpShooter (a regular here)
 
tradio wrote:
With BBF, the auto focus only activates when the back button is depressed. If you want to manual focus, just don't press the back button.
You have auto focus at the touch of a thumb or if you want manual, let off the button and focus away.


Tradio, I'll agree, but it could also get confusing and possibly be also brand specific.
You would have to be in the custom function area and disengage the shutter focus button entirely from focus and reassign it. That's not how they come set up stock. In the stock configuration you still have two focus functions one with the shutter button and one with the back-button. They are performing the same exact function and the lens would have to go to manual on the switch.

I guess what I'm saying is, that, just can't be grown out as just general info w/o information explaning how it's set up.
But yes, you are right, or at least with my Canon it would be.
Tradio, thanks for the explanation! ;-)
SS
Jun 26, 2015 16:38:09   #
BebuLamar (a regular here)
 
Nikon cameras that use screw and with lenses that use screw can be damaged
 
Jun 26, 2015 16:48:12   #
wingclui44 (a regular here)
 
n3eg wrote:
In micro four thirds, the lens ring does nothing if you MF when AF is on. You have to turn AF off to use it. No damage.


Yes, It does! My OLy. EP-L2 M4/3 can do it. When it is on AF mode, you may set it as "S-AF-MF". when you press the shutter half way, it will AF, but you can also turn the focus ring to fine tune the focus. No damage!
Jun 26, 2015 17:00:12   #
wingclui44 (a regular here)
 
BebuLamar wrote:
Nikon cameras that use screw and with lenses that use screw can be damaged


It's true!
That's why those Nikon D-lenses without built-in motor have the focus ring at the front end of the lens, this will avoid your hand touching the ring, because it will turn when AF is activated.
Jun 26, 2015 17:31:34   #
Peterff (a regular here)
 
John_F wrote:
This is a general question and I realize there will be variations amongst different cameras. Here it is. If I have the camera set to any one of the various auto-ficus options, would I damage the lense mechanism by rotating the lens barrel in the event I am dissatisfied with the auto-focus result. Should the camera software reassert its focus.


Quite possibly. It depends upon the camera and the lens.
Jun 26, 2015 18:13:57   #
RWR (a regular here)
 
tradio wrote:
With BBF, the auto focus only activates when the back button is depressed. If you want to manual focus, just don't press the back button.
You have auto focus at the touch of a thumb or if you want manual, let off the button and focus away.


That little button sure is versatile. Mine is configured so that when depressed, the back opens! :lol:
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