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

Correct!





Regards



Ralph W. Lambrecht




On 10/30/04 2:03 PM, "Barrie Bunning" <barrieb@xxxxxxxxxxxxxxxx> wrote:

> Greetings ;
> If we take 50 mm as being the 'Standard lens for 35mm ' then 100mm is
> double that length:
> If we take 150mm as being the Standard lens for 4"x5"' then 300mm is double
> that length:
> I believe we should compare 'Focal lengths'  NOT  Film area.
> Cheers Barrie B.
> At 10:48 AM 30/10/2004, you wrote:
>> At 04:36 PM 10/29/2004, Gene Johnson wrote:
>> 
>> 
>>> 1600mm?  You sure about that Jim?  I was thinking more like 400.  He used a
>>> 100mm on his 35mm camera
>> 
>> 
>> The 4x5 frame is roughly 16x the 35mm frame. This is all about image
>> magnification. 16x 100 = 1600.
>> 
>> But I could be wrong and would gladly accept another proof.
>> 
>> Jim
>> 
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