I am not sure of this. If sync is timed properly for shoe, it should also
be okay at sync socket. hmm
John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington, NY, 11743-4714,
631-424-2121, www.zuiko.com
Olympus OM Service since 1977
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----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxx>
To: "Olympus mail list" <olympus@xxxxxxxxxx>; <foefam@xxxxxxxxxxx>
Sent: Saturday, January 29, 2005 9:09 AM
Subject: [OM] Re: Back on-list, and a question - flash sync
> foefam said:
>
> I'm starting my first forays into studio lighting. After getting my last
> roll of film developed I noticed that some of the flash shots had a
> black bar down the left hand side. Some of the photos were taken with a
> T32 mounted in the shoe, and some were taken with a sync cord attached
> to an Alien Bees monolight. With the latter setup I had the T32 on a
> slave to overexpose a white wall behind the subject. Shutter speeds were
> all 1/60.
>
> The black bar showed up only in the sync cord shots; the T32's all came
> out fine. I'm chalking it up to one of two things:
> 1) Flash sync at 1/60 only works with OEM flashes (T32, T20, etc.) and
> other brands and/or PC sync requires 1/30.
> 2) User error. It's possible that the PC sync/Alien Bees setup, I left
> the camera set to auto instead of manual. The OTF sensor may have sensed
> a properly exposed photo, especially with the T32 on the white
> background, and closed the shutter earlier than 1/60.
>
> I'm leaning towards solution 2. I'll be conducting some more tests this
> weekend, with the camera set to both manual and auto. If anyone on the
> list has any other suggestions or links to websites dealing with OM
> flash, I'd love to hear them. The OM-2s manual isn't too helpful on this
> topic.
>
> I wonder if the same problem might occur if you are using the auto
> setting with a non-Olympus T-series flash?
> -----------------------------------------------------------------
>
> I also have OM-2s', T-32's and Alien Bees. But thinking back I realized
> that I have never used the Alien Bees with film. They have only ever
> been used with the Minolta A1 which provides pretty high sync speed. I
> typically use 1/250 as the sync speed with the Bees via PC connection or
> radio transmitter off the hot shoe and have never had a sync problem.
>
> Whatever your problem is with the 2s/Bee setup I don't think it is any
> delay on the part of the Bee in responding to the flash signal. Even
> with the radio transmitter involved it syncs perfectly at 1/250 and I
> suspect it will go even faster than that. It should have absolutely no
> problem with 1/60th.
>
> Although I have never yet used the Bees in conjuction with the film
> cameras I would never attempt to set the camera in auto mode with a
> flash connected to the PC socket. There is always the possibility that
> the camera will decide that the ambient light is sufficient and choose a
> shutter speed a little bit faster than 1/60th or just fast enough to put
> a black bar in your frame. Even when I was using T-32's in a studio
> arrangement I would place the T-32's and OM-2s in manual mode.
>
> Chuck Norcutt
>
>
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