Check to make sure shoe is tight. If ttl pin is not making good contact
inside top cover, flash will full discharge during a ttl exposure. or,
remove shoe and look into small hole with a loupe. There should be shiny
metal at the bottom. Often, however, this contact gets all fouled with
deteriorated prism foam, turning it a dark green or black. It is very
difficult to clean this contact from the outside as pressing too hard can
bend the contact down, pushing it out of reach of the ttl pin.
John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington, NY 11743
631-424-2121 | omtech@xxxxxxxxx
www.zuiko.com
Factory Trained OM Service since 1977
__________________________________
----- Original Message -----
From: <usher99@xxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Monday, September 19, 2005 6:34 PM
Subject: [OM] Fwd: T20 problem
>
> Thanks for your response. My camera body, I believe, is the OM-2 with
> accessory shoe 3. I have seen photos of the other incarnations and I
> believe they are clearly designated on the body. Flipping the calculator
> panel on the T20 to the TTL mode forces the selector switch to "manual"
> and placing the camera on "auto" should render it all set for TTL auto. I
> hope I just have a contact problem of sorts, else please advise, if
> possible.
> Mike G
>
> -----Original Message-----
> From: USHER99
> To: olympus@xxxxxxxxxx
> Sent: Sun, 18 Sep 2005 10:52:25 PM Eastern Daylight Time
> Subject: T20 problem
>
>
> Hope someone has a suggestion. Recently at a wedding near Big Fork
> Montana. Most often use Vivitar 283 for flash though occasionally the
> T20. It will not fire in TTL mode---the shutter stayed open for 3-4 sec.
> I do not remember if I had tried to synch at 1/60 or 1/30 th. Non TTL
> auto with the T20 and the 283 work fine. I wonder if it has anything to
> do with the 3rd contact and whether I will need to send in the OM-2 and/or
> the T20 if there is no easy fix. Thanks.
>
> I also wanted to contribute something to the archives. [Worked this out
> during 7 hr layover in Denver as the connecting flt was canceled. This
> may be a solution in search of a problem] Noticed when searching the
> archives on the T20 that the calculator panel is frequently lost. One
> does not really require it and it is not necessary as had been suggested
> to copy down the 2 f stops available. The flip side of the calculator
> panel ("full auto") forces the selector switch to the far left "manual"
> position. The GN=2X sqrt(ASA) meters or approx. 6.6 X sqrt(ASA) (ft)
> Thus max coupling range for TTL auto=
> GN/f stop. For non TTL auto the left most f stop available is 2 X
> sqrt(ASA)/5 and the right-most is 4X sqrt(ASA)/5. Hope someone can use
> this. I still do not wish to lose my calculator panel.
> Mike G
>
>
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