Archived posting to the Leica Users Group, 2004/02/20
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At 10:01 AM -0800 2/20/04, Jacques Bilinski & Barbara Bradbury wrote:
> >
>> I doubt it will. Sensor size, or rather the relationship between
>> sensor size and the final image is indeed important in determining
>> DOF.
>>
>> Once again you are ignoring CoC considerations; ie, DOF on the
>> negative is not the same as DOF on the print.
>>
>So Henning, a quick (practical) question. Is it the case that a small
>sensor digital camera is not able to produce a portrait with an out-of-focus
>background the way a 35mm can (same f stop and same perspective)? This was
>stated on the LUG a while back, but may or may not be true.
In practice that is true; you get greater 'effective' depth of field
with a small-sensor digicam than with a 35mm camera used at the same
aperture, but not nearly as great a depth of field as the very short
focal lengths and medium apertures would lead you to believe from
film experience.
The kickers are that 35mm P&S cameras generally have very slow
lenses, so their depth of field is also rather large, whereas 35mm
SLR's and our favourite cameras, the Leicas, have a good selection of
lenses with considerably larger apertures than any small-sensor
digicams, so that mayber our expectations for shallow depth of field
portraits are rather different than the expectations of 35mm P&S
users.
- --
* Henning J. Wulff
/|\ Wulff Photography & Design
/###\ mailto:henningw@archiphoto.com
|[ ]| http://www.archiphoto.com
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