If you want to use a wire you can control a small relay with a battery 
nearer the camera. But many bird photographers use wireless shutter 
releases and you could do a Google search for information about these. I 
know someone who does this but can't give you details because he's 
working on a project that will eventually be marketed. I can tell you 
that for releasing the shutter he's using off the shelf wireless equipment.

Don

mike wilson wrote:
>> From: Aaron Reynolds <[EMAIL PROTECTED]>
>> Date: 2006/06/20 Tue PM 08:02:32 GMT
>> To: Pentax-Discuss Mail List <[email protected]>
>> Subject: Re: loooooooong distance remote or IR release
>>
>>
>> On Jun 20, 2006, at 2:35 PM, Shel Belinkoff wrote:
>>
>>     
>>> How much length might you need.
>>>       
>> Oh, a hell of a lot.  Couple hundred feet.
>>     
>
> You might start running into resistance problems at that distance.  The 
> resistance of the wire is enough to make the camera think that the shutter 
> button is still unpushed.  IIRC, the Pentax IR remote works up to 250ft.
>
>   
>> Thanks for the suggestions, all.  Anyone got any thoughts on adapting a 
>> foot pedal to do the job?  I really only need the shooting position -- 
>> AF will be disabled and exposure will be locked in.
>>
>> Ideally, I want to be able to shoot while also using another camera in 
>> my hands.
>>
>> -Aaron
>>
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>>
>>     
>
>
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-- 
Dr E D F Williams
www.kolumbus.fi/mimosa/
http://personal.inet.fi/cool/don.williams/
41660 TOIVAKKA – Finland - +358400706616


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