Re: [KOML] Depth of Field Scale

[Douglas Braun <doug.braun@intel.com>]

Note that for a given f-stop, the depth of focus, expressed as
the amount of lens movement, or knob rotation, is independent
of focal length.  Thus, if you put DOF marks around the focusing
knob, they would apply to ANY lens that you used.

Doug Braun


At 10:02 AM 11/4/99 , you wrote:
 >Well they say it's hard for "guys" to stop and ask for
 >directions when driving, as a pretty active shooter I hesitate
 >to admit that I cannot interpret use of the 90mm DOF range on
 >the lens hood.  (BTW I usually have no problem with asking
 >directions, because I am so frequently lost.)
 >
 >So on a typical lens there are often color coded bars
 >(pairs)running from the fstop ring to the distance ring and that
 >gives you the DOF.
 >
 >Now, could someone talk me through it with the K O let's say
 >with it focused at 6 feet at f8?  Then 15 feet at f11?