ummmmmm, what is a "PTFE bearing unit" ?

Digital Image Studio wrote:
> On 09/05/07, Feroze <[EMAIL PROTECTED]> wrote:
>   
>> Thanks for your comments, I have to weight the amount invested in any
>> piece of equipment against what I'm getting out of it.
>> I've got to factor in the cost of the tripod as well as shipping (these
>> 2 items to South Africa is $90 shipping), I'd probably a few good years
>> service from the head, write it off over 3 years and replace it if needed.
>>     
>
> I would be surprised if you didn't get more than three years out of
> it, the only thing that you really have to watch with ball heads is
> dust. If you often find yourself using it in dusty locations learn how
> to strip it down and re-grease it (or clean it if it's a PTFE bearing
> unit).
>
>   

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