John, thanks for your answer.
There are " three " different inscriptions on the lenses 50 1.4 for " four "
different lenses.
The lenses sigle coated ( G. Zuiko) are Chrome or Black, and theese two
lenses are very, very different on coating and performance. (Dramaticaly
different). I ask some times to Gary Reese if the lens tested on his site as
"single coated" is Chrome or Black, but he don´t remember this.
Exactly the same happens on the chapter 50 mm f 1.8. The two lenses single
coated,( both "F. Zuiko" ), Chrome and Black, are dramaticaly different on
the coating colour and (more important) on the performance.
On my opinion (several tests outdoor), the lenses 1.8 and 1.4 single coated
Black are good lenses, even very good lenses. Not the same the lenses 1.8
and 1.4 single coated with Chrome rim (the first ones).
I asked to you concerning some tests indoor-outdoor with the lenses 50mm 1.4
because I test almost two times on the year the lenses 1.4 and 1.8 for take
my own conclusions and for contrast and complete with the tests of Gary
Reese (very different system). Well, on the lenses 1.8, my tests say that
the best 50 1.8 is the lens "Zuiko MC" (early multi coated) . Exactly the
same happens on my tests with the lenses 1.4, the best for me is the lens
"Zuiko MC" (early multi coated).
On the past I have three lenses 1.4 "Zuiko MC" (7##.###, 8##.### and
9##.###). Now I have only the 9##.###. Concerning
the lens >1000 000, I have the two I know: 1 010.### "Zuiko MC" and
1112.### "Zuiko" ("Japan"). No one of theese two lenses are for me excellent
lenses watching with attention the slides. I don´t want to say nothing
concerning the performance on lines / mm and other tech. tests. I´m only
talking about the general view of the picture test done on "the real life,
outdoor". The two kind of lenses 1.4 > 1000.000 show a rare kind of flare,
not so neat. For this I have interest on to know your tests indoor-outdoor
with the 1.4 lenses. (And the tests of other List members,or course).
Ángel Lobo.
Cuenca ( Spain )
----- Original Message -----
From: John A. Lind <jlind@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Thursday, January 18, 2001 8:28 PM
Subject: RE: [OM] 50mm Lens Versions (again)
The front and back coating reflections appear the same when comparing the
two lenses with S/N's over 1,000,000. I must look at their filter ring
inscriptions to tell them apart. My conclusion is both have the same
multi-coating formulation. The coating reflections of these two lenses is
very different from the third one with a S/N _under_ 1,000,000.
Olympus used three different inscriptions for the "Zuiko" markings on the
50/1.4's: "G.Zuiko", "Zuiko MC" and "Zuiko". The inscription on the
1,0##,### reads "Zuiko MC" and the inscription on the 1,1##,### reads
"Zuiko".
[Note: At one time Olympus marked the multi-coated lenses with "MC" to
differentiate them from the single-coated lenses. I have several lenses in
different focal lengths marked with "MC". It's my understanding that after
all the lenses became multi-coated, Olympus stopped marking them "MC" as
the marking was not needed any more. I have several more multi-coated
lenses in other focal lengths that are not marked with "MC".]
I just started shooting the same subject material using the 50/1.2 and all
three 50/1.4's with the same film (Kodachrome 64) and camera body
(OM-2S). That roll went out for processing today. I am continuing using
all four lenses on the OM-4 with Ektachrome 100 EPN, but have not finshed
it yet. I want to shoot a variety of subject material indoor and outdoor
with all four lenses.
When all the film is processed I will project the slides onto a 50 inch
white matte screen using a high quality Schneider-Kreuznach lens. If there
is enough difference between them that it would show in practical use, I
should be able to see it when the slides are projected. Among my older
slides, I can easily tell which ones were shot with my 50/1.2 and which
ones were shot with a single-coated 50/1.8 I used to own.
This does not mean Gary Reese would not be able to detect differences
between them with his more scientific methods. He uses a test chart made
from a topographic map, and a rigorous procedure for shooting a lens and
measuring results.
-- John
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