Focus issues

**VincenTC** · 02-08-2010, 04:26 PM

Hi to everybody,
my mint Ozeck 135 is just arrived...
it's a K mount and fits my K20d very well, in M mode when I push the green button the diaphram goes for a moment at the right aperture, and the red dot give me the perfect focus but... all the shots aren't in focus!

I don't know why...

Damn Brit · 02-08-2010, 04:32 PM

The red dot isn't giving you focus, that's just showing you where the area of focus is.
You have to focus the lens manually and when in focus, a green hexagon will appear at the bottom of the viewfinder.

Wheatfield · 02-08-2010, 06:14 PM

You might have to turn the focus ring.....

Marc Sabatella · 02-08-2010, 11:10 PM

Assuming it's a manual focus lens, the confirmation is just regarding somethng near the center of the image. If you're shooting at a large aperture, DOF will be pretty thin, but *something* near the center shuld indeed be in focus if the green hexagon comes on. As mentioned, the red dot does not confirm tha focus has been achieved. It's just the camera's way of saying, "yes, I recognize that you are trying to focus on something near here".

**VincenTC** · 02-09-2010, 05:18 AM

Originally posted by Marc Sabatella

Assuming it's a manual focus lens, the confirmation is just regarding somethng near the center of the image. If you're shooting at a large aperture, DOF will be pretty thin, but *something* near the center shuld indeed be in focus if the green hexagon comes on. As mentioned, the red dot does not confirm tha focus has been achieved. It's just the camera's way of saying, "yes, I recognize that you are trying to focus on something near here".

Yes, Marc, you are right, the lens is manual focus, at f2,8 I suppose it has a thin DOF, but it must have a little area in focus.
Now this isn't true, all into the frame is OOF, the subject I focus is OOF, although the focus confirmation is in (green hexagon always comes on, if not I can't shot...).
Strange situation...

Marc Sabatella · 02-09-2010, 01:49 PM

As always, it's ahrd to say any more without seeing samples.

02-08-2010, 04:26 PM	#1
VincenTC Site Supporter Join Date: Feb 2009 Location: Turin, Italy Photos: Gallery Posts: 47	Focus issues Hi to everybody, my mint Ozeck 135 is just arrived... it's a K mount and fits my K20d very well, in M mode when I push the green button the diaphram goes for a moment at the right aperture, and the red dot give me the perfect focus but... all the shots aren't in focus! I don't know why...

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02-08-2010, 04:32 PM	#2
Damn Brit Guest	The red dot isn't giving you focus, that's just showing you where the area of focus is. You have to focus the lens manually and when in focus, a green hexagon will appear at the bottom of the viewfinder.

02-08-2010, 06:14 PM	#3
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,981	You might have to turn the focus ring.....

02-08-2010, 11:10 PM	#4
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Assuming it's a manual focus lens, the confirmation is just regarding somethng near the center of the image. If you're shooting at a large aperture, DOF will be pretty thin, but something near the center shuld indeed be in focus if the green hexagon comes on. As mentioned, the red dot does not confirm tha focus has been achieved. It's just the camera's way of saying, "yes, I recognize that you are trying to focus on something near here".

02-09-2010, 05:18 AM	#5
VincenTC Site Supporter Join Date: Feb 2009 Location: Turin, Italy Photos: Gallery Posts: 47 Original Poster	Originally posted by Marc Sabatella Assuming it's a manual focus lens, the confirmation is just regarding somethng near the center of the image. If you're shooting at a large aperture, DOF will be pretty thin, but something near the center shuld indeed be in focus if the green hexagon comes on. As mentioned, the red dot does not confirm tha focus has been achieved. It's just the camera's way of saying, "yes, I recognize that you are trying to focus on something near here". Yes, Marc, you are right, the lens is manual focus, at f2,8 I suppose it has a thin DOF, but it must have a little area in focus. Now this isn't true, all into the frame is OOF, the subject I focus is OOF, although the focus confirmation is in (green hexagon always comes on, if not I can't shot...). Strange situation...

02-09-2010, 01:49 PM	#6
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	As always, it's ahrd to say any more without seeing samples.