DOF Preview Button

Bubbabob · 06-22-2008, 06:32 PM

Could someone explain how the DOF preview button works?

Thanks

EDIT:

Oh, camera is a KM.

Last edited by Bubbabob; 06-22-2008 at 07:49 PM.

**WJW** · 06-22-2008, 08:05 PM

Originally posted by Bubbabob

Could someone explain how the DOF preview button works?

The DoF preview button stops the lens down to the shooting aperture rather than the wide open (maximum) aperture. This makes the view dimmer (less light) but lets you see what actually is reasonable focus on either side of the focus point.

**ChrisPlatt** · 06-22-2008, 10:41 PM

I'm somewhat nearsighted, and when I squint I can see far objects in sharper focus.
It's not a perfect analogy, but that's like stopping down my eyes for greater depth of field...

Chris

06-22-2008, 06:32 PM	#1
Bubbabob Inactive Account Join Date: Jun 2008 Location: SE Alabama Posts: 44	DOF Preview Button Could someone explain how the DOF preview button works? Thanks EDIT: Oh, camera is a KM. Last edited by Bubbabob; 06-22-2008 at 07:49 PM.

06-22-2008, 10:41 PM	#3
ChrisPlatt Site Supporter Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,692	I'm somewhat nearsighted, and when I squint I can see far objects in sharper focus. It's not a perfect analogy, but that's like stopping down my eyes for greater depth of field... Chris Last edited by ChrisPlatt; 07-20-2008 at 03:55 PM.

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06-22-2008, 08:05 PM	#2
WJW Site Supporter Join Date: Apr 2008 Location: Central Texas Posts: 383	Originally posted by Bubbabob Could someone explain how the DOF preview button works? The DoF preview button stops the lens down to the shooting aperture rather than the wide open (maximum) aperture. This makes the view dimmer (less light) but lets you see what actually is reasonable focus on either side of the focus point.

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