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Re: [OM] Adaptall 2 and OM2SP

Subject: Re: [OM] Adaptall 2 and OM2SP
From: WKato@xxxxxxx
Date: Wed, 20 Sep 2000 11:28:35 EDT
Cc: bandvg@xxxxxxxxxxxxxxxxx
In a message dated 9/20/00 8:14:20 AM Pacific Daylight Time, 
bandvg@xxxxxxxxxxxxxxxxx writes:

>  I have
>  now discovered that moving some of the available 'controls' on the outside
>  of the Adaptall 2 before fitting it to the camera results in sensible
>  readings in the viewfinder for both manual and auto settings.  But I am not
>  sure exactly what I did!  Can anyone point me in the direction of
>  instructions for setting up the lens/adaptall 2 before attaching it to the
>  camera so that I can use the spot facility?

I have this Tamron 500mm and don't know what "controls" you are talking 
about. One of them is the lens release button. A smaller 4mm button is the 
one you push to remove the Adaptall mount from the lens itself. There is also 
a third spoon shaped projection that is used to convey the aperture of the 
lens to the Oly body. This has to fit in a slot in the lens in order for the 
correct information to be conveyed. This is probably what you adjusted.

On Olympus cameras, the lens does not send information about the actual 
aperture set but only how many f stops the lens has been stopped down. If the 
keying device was not in its proper slot, the exposure would not be correct 
on manual but would be on automatic. To attach the adaptall mount to the 
lens, match up the green dots, make sure the aperture keying device is in the 
proper place, and turn until it clicks.

Warren

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