Archived posting to the Leica Users Group, 2001/10/15

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Subject: Re: [Leica] 75 lux performance
From: "Jerry S. Justianto" <jsjm6@cbn.net.id>
Date: Mon, 15 Oct 2001 21:03:40 +0700
References: <200110151100.HAA22856@tigercat.nyfir.pwj.com>

I notice the shadows, the middle seems very soft.
It seems that your 75 lux a little bit out of focus.
But I am not really sure, is it because of the bokeh or focus problem?

JSJ


- ----- Original Message -----
From: "Rei Shinozuka" <shino@ubspainewebber.com>
To: "Leica Users Group (LUG)" <leica-users@mejac.palo-alto.ca.us>
Sent: Monday, October 15, 2001 6:00 PM
Subject: [Leica] 75 lux performance


>
> http://www.shinozuka-family.com/20011014test/
>
> over the weekend, i evaluated a 75/f1.4 M which appeared to be in mint
> condition.  i was a bit dissapointed in wide-open performance, and
wondering
> if it might be a bad sample, or need a CLA or something.  highlights
seemed
> ghostly, and the image seemed a tad more soft and low contrast than
> i would have expected from this lens.  i'd really appreciate
> the advice of 75M owner if my findings are representative of the 75M.
>
> i'm particularly surprised because the 90 cron seemed as good or better
> at equivalent stops and i've certainly read more about the performance
> of the 75 lux than the pre-AA 90 cron.
>
> i set it up on a gitzo 1228 tripod pointing at the shed in my backyard on
> an overcast saturday and shot it wide open, f2 and f4.  i also shot
> alongside with a gen III 90 cron (latest pre AA version) and 35/1.4 ASPH.
> i moved the tripod for the 3 lenses to get approximately the same angle
> of coverage.  film was Fuji ACROS exposed at EI64 and developed in
XTOL(1+3).
>
> i posted magnified sections to:
>
> http://www.shinozuka-family.com/20011014test/
>
> each of the squares is 400x400, representing about 3.6mm x 3.6mm sections
> of the neg, scanned at 2820 dpi.  its arranged such that
> every row is at the same f stop.
>
> do you guys think the top middle one is good performance?
>
> thanks very much!
>
> -rei
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>
>

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In reply to: Message from Rei Shinozuka <shino@ubspainewebber.com> ([Leica] 75 lux performance)