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Re: RE:[OM] A sack of shot redux

Subject: Re: RE:[OM] A sack of shot redux
From: "Walt Wayman" <hiwayman@xxxxxxxxx>
Date: Fri, 2 Nov 2001 08:04:18 -0500
A final word on the sack of shot thing.  A couple of writers seem 
to have misunderstood its purpose, apparently believing it's just 
to add weight to the photographic ensemble.  That is not the 
purpose.  Weight can easily be added to the tripod any number of 
simple ways, such as hanging the camera bag on it, or you might 
carry one of those old mesh potato sacks and enlist the aid of a 
local rock or two. 

Because of the physical characteristics of the loose, heavy lead 
shot in the bag, hopefully making maximum contact with the 
equipment, it absorbs and dampens the vibrations within the 
camera/lens combination caused by the mirror flopping up and the 
diaphragm slamming semi-shut. Though the added weight may be of 
some benefit, it is not the object of the exercise.  A brick or a 
book or a small, furry animal atop the gear would not serve the 
same purpose, and a Mack truck hanging from a tripod made of 
reinforced concrete will have no effect on vibrations inside the 
camera.

Any hi-fi nuts out there may be familiar with this notion.  Being 
also a vinylholic, I have to admit that's where I got the idea.  
Some of the high-end equipment stands for turntables have hollow 
legs which you fill with lead shot to dampen vibration.

Walt Wayman

 


 
                   

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