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Re: [OM] Depth of field preview

Subject: Re: [OM] Depth of field preview
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Wed, 24 Jun 2009 05:58:02 -0400
And in the real world of prints (as opposed to the viewfinder) the size 
of the print.  Standard DOF tables assume about an 8X print 
magnification.  Larger prints result in less DOF and smaller prints 
result in greater DOF.

Chuck Norcutt


NSURIT@xxxxxxx wrote:
> Nic, others have likely answered your question.  When you press the  DOF 
> preview the aperture on the lens is closed down and this is one of the tools  
> you can use to see what the depth of field when be on that setting.  When  
> the aperture is closed down, less light passes thru the lens and it will  
> become more difficult to see through the lens.  Depth of field being the  
> space 
> between the point where the image is in sharp or acceptable focus and  
> where it is no longer in sharp or acceptable focus.  Three things will  
> affect 
> your depth of field.  
>  
> Focal length of the lens.
>  
> Aperture you set on the lens.
>  
> The distance between you and your subject.
>  
> Bill Barber
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