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Re: [OM] Hep! Dr. Flash needs... um, flash help

Subject: Re: [OM] Hep! Dr. Flash needs... um, flash help
From: Steve & Alicia Goss <stevegoss@xxxxxxxxxxxxx>
Date: Tue, 30 Dec 2008 19:58:22 -0600
Not exactly sure what you mean by the T-32 not being in TTL mode versus 
auto mode. The T-32 really isn't that sophisticated.  The only real 
control is the slider that controls how much power it puts out. The only 
thing that switching the panel over to "Auto" does is ensure that the 
power switch is set to full output.

So if you had the T32 set to partial power, and the lens got moved to 
f11, those may be underexposed, if using all of the partial power wasn't 
enough for the situation.

At least, that's my theory. The big question will be answered when the 
roll gets developed.

Thanks, Steve Goss, Dallas Tx usa

Chuck Norcutt wrote:
> OK, I think I have this figured out.  I finally found the reference to 
> the fixed 1/60 second shutter speed with a T-flash attached.  It's in 
> the eSIF.  It does not appear in the OM-2/2n or T-32 manuals. 
> Furthermore, it's specific to the OM-2n.  The OM-2 does not do flash 
> ready, does not know the flash is there and doesn't force the shutter 
> speed to any specific value.
> Yes, the camera does show "flash ready" with both body and flash in 
> their respective auto modes.  That should mean that the camera has 
> recognized a T-flash unit and, since the ambient light was well below 
> 1/60 second, it has set the shutter to 1/60.  Since the camera is in 
> auto mode and has sensed a T-flash it will assume that the T-flash is in 
> TTL mode... it has no way of knowing that it's not.  When the flash 
> fires, the camera will issue a quench signal to the flash when 
> sufficient light has been received.  However, since the flash is in auto 
> and not TTL mode the flash isn't paying attention to the quench signal. 
>   It will do its own thing according to the indicated ISO and aperture 
> on the calculator panel which was showing ISO 400 and f/8.  Those 
> exposures taken at f/8 should be properly exposed.  Those exposures 
> taken after the aperture ring was accidentally shifted to f/11 will be 
> underexposed by one stop.  As Wayne indicated that's not much of an 
> error for color negative film.
> Dr. Flash
> Moose wrote:
>> Chuck Norcutt wrote:
>>> I decided to go retro at Christmas dinner tonight so took out the 
>>> pristine, black OM-2n and a T-32 and a roll of Kodak NPS 400....
>>> What I *think* should happen is that the camera will see the fairly low 
>>> ambient light around the dinner table and, at f/8 or f/11, despite the 
>>> ISO 400 film, will decide to use a shutter speed somewhere around 1/15 
>>> second or so.  
>> Did you see a flash ready light in the viewfinder? If so, you should get 
>> 1/60 shutter speed. The flash ready signal is how the camera knows there 
>> is a T flash attached.
>> The T32 manual shows the viewfinder flash confirmation light indicating 
>> flash ready and flashing to show adequate flash exposure in flash Auto 
>> mode on the OM-1n, so the flash ready indication does indeed operate in 
>> flash Auto mode. There wouldn't be any point in the OM-1n otherwise. 
>> That should cause the OM-2n in camera Auto to set a fixed 1/60.
>> A. Flashy Moose

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