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[OM] Re: OM to four thirds adapter

Subject: [OM] Re: OM to four thirds adapter
From: Moose <olymoose@xxxxxxxxxxxxxxx>
Date: Wed, 08 Sep 2004 00:19:25 -0700
There are only 2 ways that such an adapter CAN operate without internal 
electronics, which none of them have so far.

The Kindai OM=EOS can be set up either way:

1. When the lens is bayonetted into the adapter, the adapter pushes the 
aperture close-down tab so that movement of the aperture ring directly 
opens and closes the diaphram. Thus one must open it up to focus, then 
close it to shooting aperture to take the pic.

2. The adapter does nothing to the aperture. You press the DOF button to 
see what speed the camera will select and  before pressing the shutter 
release.

I don't know if the Kindai OM=> 4/3 adapter has both modes, but it 
certainly will have the first.

I believe the Oly OM=> 4/3 adapter only has the first mode, but others 
may clarify that.

R.Jackson wrote:

>Can someone explain to me exactly how you operate an E-1 with one of 
>these lens adapters? Are you actually opening and closing the aperture 
>when you adjust the aperture settings? Is that what they mean when they 
>say, "operate at stop down shooting aperture"? So you move the aperture 
>ring and the lens actually stops down like in "preview" mode on my old 
>Yashica?
>
Whichever mode the adapter uses, yes, the lens has to be at shooting 
aperture by manual action separate from the camera body before pressing 
the shutter release.

> And then I assume the meter on the E-1 operates normally?
>
Obviously, it can't work in any mode where the body varies the aperture, 
such as program or shutter preferred modes. It works normally in AE mode 
and manual mode.

>Am I close on this one? Since I haven't ever tried it I'm a little hazy on the 
>procedure. I'm still not completely sold on the idea of using my OM lenses 
>with the magnification factor of the smaller sensor, but I'm getting a little 
>nuts about owning a "real" digital camera and starting to wonder if I should 
>take the plunge anyway.
>
Unless you are in a big rush, why not wait for the next E system body to 
be announced this month and see what it offers.

I don't know if there are any listees in your neck of the woods, Santa 
Rosa-ish, no?. If you are going to be in the East Bay and would like to 
try out the procedure, drop me a line Although I have a Can*n, the drill 
is the same. Bring your new eyes. :-)

Moose




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