If you use different "sensor" sizes (be the sensor film or CCD), and assume:
1) you stand in the same position, usig lenses that give you the same angle of view
2) you make prints of the same size and want the same apparent depth of filed in these prints, i. e. circle of confusion *in these prints*
then youŽll find that the f/stop DIAMETER you need to use are inversely proportional to the sensor sizes, i. e. the multiplier values, if you use full frame 35 as a reference. Remember, one f/stop more light means twice the area = 1.4 times the diameter. Thus, any lens on the D30/D60 should be opened almost exactly one step to give same d o f as a full frame camera with equivalent focal length.
Most consumer digitals have sensors smaller than the negative of a Minox subminiature. I donŽt recall the exact values now, but I remember finding that my old Olympus E10 fully open (f/2 gave the same d o f as a 35 mm camera stopped down to f/8, again at the equivalent focal length.
Per
tisdagen den 11 februari 2003 kl 23.49 skrev Lawrence Smith:
On 2/11/03 4:56 PM, "Brian Blankenship" <brian@bngraphics.com> wrote:I don't know about the D1x, but the D30/D60 use a .5" chip, that's like
shooting with 110 film (but better resolving power of course), which
results in more DOF.
The D1x has a 1.5 multiplier. While the DOF is increased somewhat it is no
where near what you described. I shoot at f2.8 - f5.6 all the time using a
variety of lenses and the DOF is easy to control quite what you would
expect. Have you used the D60 much?
Lawrence
