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Re: [OM] Flash foul-up, what happened?

Subject: Re: [OM] Flash foul-up, what happened?
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Tue, 04 May 2010 10:10:15 -0400
We'd maybe never know the difference.  Of the several flash bulb guns 
I've owned I believe all were designed only for attachment to the PC 
socket.  But I could be wrong.  That was a long time ago.

Chuck Norcutt


John Hermanson wrote:
> Yes, as I recall, on the 1N / 2N, FP sync is available only at the sync 
> socket.   I have never used FP.
> ___________________________________
> 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:
>> So, with the 2N and 1N you'd have to use the PC connection as well as 
>> setting the sync to FP in order to use a flash bulb?
>>
>> Chuck Norcutt
>>
>>
>> John Hermanson wrote:
>>> 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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