Only the 2N (and 1N) have constant X sync at the hot shoe regardless of
sync switch position, and that is with any flash, not just Ts. There's
a diode in the flash circuit that allows this, though it does prevent
some studio flashes from firing.
Olympus Service made up a small plastic "doohickey" that snaps in behind
the sync switch. It was created for use on UPI ad National Geographic
cameras. It holds the switch at X and prevents accidental turning. I
have some of those.
________________________________
John Hermanson | CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121 | www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html
Chuck Norcutt wrote:
> See your OM-2 manual. If you have a T-flash mounted the camera senses
> it and automatically sets X sync regardless of the switch setting. If
> you don't have a T-flash mounted you're responsible to set the sync to
> FP or X yourself.
>
> Flash bulbs used to be sold in different types. FP was the type to be
> used on cameras that had focal plane shutters. The characteristic of an
> FP bulb was a long burn time. Since the bulb puts out light
> continuously the bulb is able to sync the full range from 1/60 to
> 1/1000. But the manual says not longer than 1/60. 1/60, of course, is
> the max for OM cameras on X sync. But I don't know if you'd get proper
> sync for both regardless of sync setting at 1/60. I think not. I
> suspect the bulb on FP would get lit as soon as the first shutter
> curtain started to open. But that would be a disaster for an X sync
> electronic flash. It would have dumped it's charge completely before
> the first curtain got off the starting gate. That's probably what
> happened to you.
>
> I've never done it myself but I can recall someone on this list from
> many years ago describing some way to lock the sync switch on to X. It
> may have been a tiny dab of contact cement which would be easily
> removable if desired. I just went to take a look at my OM-1's sync
> switch to check how it might be done and was a bit startled to find it
> setting on FP. Ooops!
>
> Chuck Norcutt
>
>
> usher99@xxxxxxx wrote:
>> Thanks Chuck, AG, Carlos for thinking about this. Carlos hit the nail
>> on the head. Couldn't be an easier fix but wish the penalty for missing
>> that hadn't been so high. Happened once about 5 years ago in Montana
>> but I had a T-flash in TTL mode and I think you get a heads-up.
>> I don't remember exactly but perhaps the shutter is kept open to
>> complete the exposure. I had made a mental note that this could be a
>> disaster if happened again but obviously forgot about it. In manual
>> mode there is not a clue anthing is askew. Not sure how the FP mode
>> works , but I sure won't ever forget to check the switch position. :-(
>> I really dread picking up this batch but I was told some of the images
>> with a potential TOPE shot were interesting. We'll see.
>>
>> Mike
>>
>>
>>
>>
>>
>> Wow! I don't think I've thought about the X/FP switch since 1976. :-)
>>
>> Chuck Norcutt
>>
>>
>> Carlos J. Santisteban wrote:
>>> Hi Mike and all,
>>>
>>>
>>>> From: usher99@xxxxxxx
>>>> Nothing fancy used either. OM-2 in manual with V283 on a bracket
>> with
>>>> remote cord on the usual yellow for use with F4.
>>>>
>>> You mean the 'plain' OM-2 -- not -n, not S? Then it could be the
>> position of
>>> the X/FP switch...
>>>
>>> All the best,
>>
--
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