Re: Screw mount quandary

[Andre Langevin]

A few days ago, I used a 50/4 macro on a MZ-S to photograph paintings 
and it was not always easy to use the focus assist. I needed a 
contrasty line somewhere in the painting to get it to work.  Also, it 
seemed to me that the focus assist was a bit off compared to my eye. 
Which one is the best, I'll have to test it (the photos I took won't 
help as I was using f/8 with flash...)

Andre

I use screw mount lenses on my PZ1-p.  Although the focus assist diode
lights,  I rarely use that to indicate if my subject is in focus or not.  I
can still visually tell when focus has been achieved.  At age 62,  I guess
I'm still fortunate I can still do this.
Jim A.

 From: "Rothman, Aric" <[EMAIL PROTECTED]>
 Reply-To: [EMAIL PROTECTED]
 Date: Fri, 30 Jan 2004 10:04:02 -0700
 To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>
 Subject: Screw mount quandary
 Resent-From: [EMAIL PROTECTED]
 Resent-Date: Fri, 30 Jan 2004 12:42:06 -0500
 I'm sure the answer to this question is rather basic, but I can't
 figure it out...
 I have a 135/3.5 Super-Tak, which I mounted on an MZ-S (yes, with
 a gen-yoo-eyen Pentax M42-K adapter :).  Either wide-open, or
 stopped-down, the focus assist dot fails to light with this lens.
 It's not the speed of the lens, as I partially mounted an SMC 50/1.4,
 so as not to engage the auto aperture coupling, and stopped down to
 f/4.  Focus assist worked fine on the same well lit, high contrast
 subject (pattern of crossing diagonal lines on a dry erase board).
 There is no polarizer of any kind on the Tak.  What gives?

 Aric