Re: [KOML] FOCUS

[Bob Erdman <folkarts@erols.com>]

Gregg Laiben wrote:
> 
> At 20:36 4/24/98 -0600, you wrote:
> >Are there any pointers for focusing the 60mm lens?  Do you use the
> >rangefinder?  It seems that the 60mm should have a great depth of field
> >and be good for near-far compositions.  Focus on the nearest object and
> >use the f-stop to get the background clear?  Thanks, Curtis Fant
> 
> Neither the 60mm nor the [essentially same] 58mm have the necessary pin to
> couple with the K-O rangefinder.  Both of these lenses must be focused
> using the distance scale on the focusing knob.
> 
> My Rapid 100/200 manual has a Depth of Field table for each lens for all
> apertures and distance measurements.  Using these tables, one can easily
> determine a zone of focus using the hyperfocal distance.  Or go to Bob
> Monaghan's web page and calculate the DoF using his program.  For PalmPilot
> users, there is a program available to allow you to easily calculate these
> numbers in the field.
> 
> ...gregg
Neither the 58 nor the 60 NEED a pin to couple! They are the baseline of
the rangefinder system. Yes they DO focus well with the rangefinder. The
other lenses (90, 180) adjust the rangefinder mirror to their focal
lengths and index WITH their pins. You really only use the auxiliary
wide-angle finder to get view of what is IN the photo.  The rangefinder
window view is visually a little limiting. - Bob.