[rollei_list] Re: xenar test roll is back
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Thu, 4 Feb 2010 07:31:21 -0300
Yes Richard, it's true; in general you use the central area of the
lens for portraits and the image edges are in out of focus areas most
of the times making no significant aberrations for that zone.
Carlos
PS: I'm writing so early in the morning 'cause this is the best hour
to develop film during the summer due to the tap water temperature.
2010/2/4 Richard Knoppow <dickburk@xxxxxxxxxxxxx>:
>
> ----- Original Message ----- From: "CarlosMFreaza" <cmfreaza@xxxxxxxxx>
> To: <rollei_list@xxxxxxxxxxxxx>
> Sent: Thursday, February 04, 2010 12:13 AM
> Subject: [rollei_list] Re: xenar test roll is back
>
>
> My Rolleicord IV Xenar is very sharp at f4, the portrait I sent for a
> postcard exchange to some members on this list too was taken with this
> camera (camera hand-held) and lens at f4 and they can judge it, I
> obtained bigger optical prints from that neg keeping the sharpness;
> anyway I agree f8-f11 are excellent for this lens.
> I never used this lens at f3.5.
>
> Carlos
>
> Because many aberrations are stop dependant and also angle dependant its
> quite possible to have a lens which is sharp in the center of the field when
> wide open or nearly so. The margins and corners will not do as well and will
> require stopping down to become sharp.
> My own experience agrees with yours, I can get very good sharpness in the
> center of the field at about f/4. I have two Rolleis with Xenars on them,
> one is a Rolleicord IV and the other an MX Rolleiflex, both made at around
> the same time.
>
> --
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
> ---
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