David there is a freeware DOF calculator from Jonathan Sachs (developed of
Picture Window) here:
http://dl-c.com/Temp/downloads/DOF%20Calculator/Default.htm
I do not believe that DoF can be usefully discussed on a text list, but I
will quote the first line of Jonathan Sachs' helpfile for DoF Calculator:
"Depth of field does not depend on the frame size (e.g. 35mm, 6x7cm, digital
camera CCD,?). For a given focal length, the frame size does however affect
the field of view. The appropriate value for resolution (see below) may need
to be adjusted based on the frame size as well as the film or CCD resolving
power and other factors."
If that starting point does not fit your frame of reference, then another
possibility is Bob Atkins' contribution at
http://www.bobatkins.com/photography/technical/depth_of_field_calc.html
which allows you to select your sensor size.
Good luck!
--
Piers
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of David Irisarri
Sent: 02 July 2008 15:18
To: olympus@xxxxxxxxxx
Subject: [OM] Converting fourthirds DOF to 35mm equivalent
Hi all.
Sometime ago I mentioned I was working in a colour project. I want to render
my E-1 images with Kodachrome color rendition.
I have started to shoot rolls of Kodachrome 64 (sand, water, foliage, sky,
colorchecker, DigitalTarget 003, Wolf Faust charts, etc...) and the same
images taken with my Olympus E-1 camera. I use a Sekonic lightmeter
L-358 because both cameras don´t measure light in the same way. Remember
E-1 is very conservative with highlights due to KAF-5101CE dynamic range is
optimized for shadows vs highlights. I am also using neutral zuiko glass for
avoiding any color shift.
I was able to get an OM-2n with a 50/1.8 MC lens and I will use my
14-54/2,8-3,5 lens at 25mm (I would prefer to use my ZD 50/2 and an OM Zuiko
100/2 but it is almost impossible to get it) I would be very pleased if
someone could tell me how to calculate the right f number for same DOF in
both cameras. Fouthirds has a wider DOF, so I presume I will have to use f4
in my E-1 camera and maybe f8 in 35mm format more or less.
I remember a DOF calculator in xls format but I can´t find it right now.
Regards,
Dave
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