[Leica] Is the DOF using a digital sensor any differentthanthatof film?

[leica at web-options.com (Bob W)]

Hi,

I've been away for a few days, so was not able to answer. I've read the
other replies, and Henning's is closest to what I mean. 

To anwer your question myself, it depends on whether or not you use a
different value for the circle of confusion. The circle of confusion is not
a property of the lens but of the average human eye. Strictly speaking when
you use a different negative/sensor size you should use a different sized
circle of confusion. If you were to shoot something on a 35mm neg then take
a crop that is equivalent to a 4/3rds sensor you should, strictly speaking,
also change the c of c that you use if you want to measure the depth of
field.

Bob

> -----Original Message-----
> From: lug-bounces+leica=web-options.com@leica-users.org 
> [mailto:lug-bounces+leica=web-options.com@leica-users.org] On 
> Behalf Of Seth Rosner
> Sent: 06 February 2009 01:46
> To: Leica Users Group
> Subject: Re: [Leica] Is the DOF using a digital sensor any 
> differentthanthatof film?
> 
> Bob, the circle of confusion of the lens doesn't change nor 
> does the area to 
> be covered - either 24x36 film or whatever is the smaller area of the 
> sensor. Upon what then, does 'it depend(s)'?
>