[pure-silver] Re: Depth of Field (35mm vs. 4x5 or 8x10)

How did you get to 1600mm? Was he not using a 100mm for 35mm format? A 400mm
focal length should do the trick and fill the 4x5 frame.





Regards



Ralph W. Lambrecht




On 10/30/04 12:42 AM, "Jim Brick" <jim@xxxxxxxxx> wrote:

> At 12:21 PM 10/29/2004, DarkroomMagic wrote:
> 
> 
>> This will change the perspective, and I understood that he wanted to keep
>> that.
> 
> 
> Correct. You would have to use approximately a 1600mm lens and shoot
> alongside the 35mm camera to fill the 4x5 frame with the same image that
> fills the 35mm frame, and keep the same perspective. And you still lose ~
> four stops of DOF.
> 
> Depending upon the subject matter, the number and type of focus planes,
> swings and tilts can gain back some of the lost DOF. But one should never
> forget that if you use a swing or tilt to gain DOF in one direction (x
> axis,) you lose the same amount in the perpendicular direction (y axis.)
> 
> There's no free lunch!
> 
> :-)
> 
> Jim 
> 
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