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[OM] T-20 on OM-1n.... was "TTL metering"

Subject: [OM] T-20 on OM-1n.... was "TTL metering"
From: "Jim L'Hommedieu" <lamadoo@xxxxxxxx>
Date: Sat, 27 Apr 2002 14:16:30 -0400
Cc: <sally30@xxxxxxxxxxx>
You can't do TTL auto on the OM-1n but you CAN make flash exposures that the
don't tie you to a certian distance.  Are you familiar with that?

The T20 has a mode called "Normal Auto".  It's described in the owner's
manual, often available as a photocopy on ebay, and SOMETIMES the actual
original manual is available on eay.  Best of all, the manual is available
on CD as part of the amazingly thorough unofficial e-SIF.

Anyway, if the back of the T20 says "fully automatic control by OM-2",
you'll have to make a change before it'll work right on your OM-1n.  Turn it
off.  Press a tiny, square black-on-black button near the "2" in "OM-2"
text.  Now stick a fingernail between the button and the T-shaped tab.
Slide the panel to the right. Turn it over.  You are now seeing the
Calculator Panel.  Slide the upper ASA slider to your film
speed using a fingernail again.  For example, ASA 160 is one dot to the left
of 200.  Slide the Calculator Panel back on.

Slide the lower slider to line up with the diamond to the right of the word
"AUTO".  Be sure it sits in a detent.  Now read up to find out how to set
the lens opening.   With ASA 160 film, for example, set the lens to 11, then
open it up a bit, 1/3 of the way to 8.

Be damn sure that the OM-1n's shutter is set to 30 or 60.

The T-20 uses an eye (inside the "O" on the front) to turn off the light
when it thinks it sees enough light.

Since the flash senses light and gives you correct exposure, you can shoot
in a living room with average snapshot distances.  No problem.  You'll have
plenty of depth-of-field to save your hide if you're focusing isn't quite
perfect.  After making all the settings, you just wait for the ready light
(on the flash or in the viewfinder of your OM-1n), focus and fire.

The settings again:
On T-20:
1.  ASA slider matches the film.
2.  Lower slider set to the diamond to the right of  "AUTO".

On the OM-1n:
1.  Lens opening matches the number above right-most diamond setting on the
T-20.
2. Shutter on 30 or 60.

==
There's more to learn if you're into it, of course but this will get you
started.

For example, this affordable and convenient flash offers as second lens
opening ("lens aperture" also sometimes called "f-stop") option.  To use it,
move the bottom slider to the diamond to the left of the word "AUTO".  Now
you read up from THAT diamond to find your aperture.  With ASA 160, you set
to f5.6, then open up 1/3 stop.

There's a manual mode but I don't recommend it for a beginner.

Every piece of equipment has limitations.  If you turn the camera sideways
to do a vertical shot, the T20 on a shoe will give you a wierd shadow to the
side of the subject.  It won't light up a basketball player doing a layup if
you're standing on the side of the court.  It won't cover a lens wider than
35mm.

The T-20 is a neat tool.  Smile.  Welcome to the family.

Lama



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