FourThirds sensor size is 13x17.3, so considered by the diagonal to
35mm film cameras, the focal length equivalence is a "2x crop factor".
However, the FourThirds format is 3:4 proportion rather than 2:3 so
that equivalence is inexact. I find a 20mm focal length on FourThirds
produces exactly the same effect, visually, as fitting a 35mm lens on
the Leica M4-P and making an 11x14 print, cropping in from the long
edge to fit the print format.
A 35-50mm lens on FourThirds is an excellent portrait tele range,
effectively, where 25mm is normal, 20mm is wide, and ultrawide is 7 to
18mm.
Godfrey
On Dec 17, 2008, at 9:55 AM, Pasvorn Boonmark wrote:
Thanks. This is a 2x crop factor, correct?
On Wed, Dec 17, 2008 at 9:49 AM, Adam Maas <a...@mawz.ca> wrote:
There's not much in the way of samples yet as the M mount adaptors
just became available last week IIRC.
--
PDML Pentax-Discuss Mail List
PDML@pdml.net
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
