Re: Zeiss Ikonta Shutter - Rapid and Synchro - both have flash?

<jjs> wrote in message 
news:13se8j388h0h1c1@[EMAIL PROTECTED]
> "Richard Knoppow" <dickburk@[EMAIL PROTECTED]
> wrote in 
> message news:13sdrc01f41di63@[EMAIL PROTECTED]
>
>>    That may be a modified shutter. Its relatively easy to 
>> modify any of the old Compur or the Compound for X synch.
>
> !! That is quite encouraging!  I will look for someone who 
> will do that. I actually use the 6x9 and a fill-flash 
> would be wonderful. Recent picture made with it here: 
> http://www.digoliardi.net/images/drake_m.jpg
>
>> [...]
>>    Most shutters with built-in flash synch were made 
>> after 1945. Before that it was usual to use some form of 
>> solenoid. [...]
>
> Those solenoids are ingenious things. An interesting 
> application is to use one as an electric remote release. 
> Just wire a two-cell flashlight case to it, press the on 
> button.
>
> Trivia side: I have a Printex flashe. It uses no battery. 
> It uses a magneto to fire the flash and a cam on the 
> magneto's shaft trips a mechanical transfer to the 
> shutter. Yup. I still use flashbulbs. Greatest things in 
> the world for off-the-camera huge light. See it here: 
> http://www.digoliardi.net/printex/batt-free-flash.html
>
>
>
     Just never fire a bulb off in your face... YIKES!!
     I agree about using solenoids for remote tripping. 
Silent and no limit on distance. Some shutters, particularly 
the Kodak Supermatic and Flash Supermatic, will not trip at 
1/400 with just two batteries and sometimes not with three. 
This was a problem in the old days and extra-high-voltage 
photoflash batteries were made for just this purpose. Its 
possible to find case extenders for Graflex flashguns to 
take an additional battery. This is usually enough to get 
the solenoid to trip reliably on 1/400th second and insure 
the voltage stays high enough to fire the bulb. Older Compur 
shutters, found on Speed Graphics, also have a high tripping 
pressure at the top speed (usually 1/200th) so will do 
better with an additonal battery. I have been trying to 
design an adaptor for getting smaller batteries in the 
Graflex case without modifying it. Four cells or even a 
9volt battery would insure reliable tripping and 
synchronization.
     Espcially on Anniversary Graphics press photgraphers 
preferred to trip the shutter using the solenoid even when 
equipped with shutters with built-in synchronizers. This is 
because of the convenience of having the trip button on the 
case, which also works as a handle.
     Flash bulbs put out more light for the weight than any 
other source. They were replaced with strobe because of 
convenience and because bulbs were always rather expensive.


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Richard Knoppow
Los Angeles, CA, USA
dickburk@[EMAIL PROTECTED]