Actually the Tessar is a f3.5. But I stayed away from attempting to shoot
particular close objects wide open; instead using f5.6 or f8 etc and slowing
the shutter accordingly. I learned much through trial and error.
Cheers,
Lee
----Original Message Follows----
From: "C.H.Ling" <chling@xxxxxxxxxxxxx>
Subject: Re: [OM] light travel kit usage [Wayne]
May be you have a very good eye/brain for judging distance, by
calculation a 40mm lens at F2.8 and 5 feet distance the DOF is +/- 5
inches, I honest say I can't do this. Even yes, the center of focus
may not be right and I can't keep a control on the in-focus area. That
mean if I get accurate focus on the eye of the object and I expect the
hair at a few inches after the eye can be inside the DOF range. BTW
DOF only means you can get 30lp/mm resolution in a 35mm system, my XA
can resolve much more than that even wide open.
C.H.Ling
Jim Couch wrote:
>
> It all depens on your ability to judge distance. I have never had a
problem with
> the Rollei 35 as far as focusing goes. I actually find it quicker
focusing than
> the XA in dim light. (The XA has pretty low contrast in the rangefinder.)
I used
> my mom's Rollei for climbing for many years until I bought an XA. A few
years ago,
> my mom gave the Rollei to me for Christmas, I usually use it for B&W and
the XA
> for slides.
>
> Jim Couch
>
>
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