Re: [APML] Question on Lenses

["John C. Mirtle" <jmirtle@shaw.ca>]

Tom,
    I can't comment on the 1.4, but I have used the 1.8 for many moons. I
always stop it down to f2.8 for slow films like Kodak E200 and have been
very, very happy with the images. Colour correction is good, vignetting
minimal and good star images right to the corners. I have put it to a real
torture test where it failed, but was pretty good at f4. This was a
hydrogen-alpha filtered series of shots using hypered tech pan. This is a
tough test for any optic, I wasn't expecting it to pass with flying colours.
:-) Most people won't abuse their lenses like this, it is otherwise a good
lens. Hopefully someone on the list can comment on the f1.4. ( I assume you
are talking about the 50mm lenses?)

John Mirtle
Calgary, Ab. Canada

----- Original Message -----
From: "Tom Skinner" <the.fzxtchr@verizon.net>
To: "'Discussion of Film Astrophotography'" <astro-photo@seds.org>
Sent: Wednesday, February 19, 2003 9:10 PM
Subject: [APML] Question on Lenses


Hello group,

I have a question.  I have two lenses for my OM1, and I need to sell
one.  Trouble is, I don't know which one to sell.

One is a truly superb (visual inspection only) 1.4 and one is a very
slightly inferior 1.8 (both late serial numbers).  The only thing wrong
with the 1.8 is a couple of tiny specks, no evidence of fungus - or even
of use, for that matter.

I wish I could do some tests, but the weather is just too bad for me.

I doubt I would ever operate either one wide open, both probably f2.8 or
f3.5.

So, which would you keep?

Thanks,

Tom




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