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I want a 400/500 f/5.6 IS/OS non-zoom lens . . .

 
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Fred Anonymous

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Since: Apr 05, 2007
Posts: 19



(Msg. 91) Posted: Wed Aug 13, 2008 6:25 pm
Post subject: Re: I want a 400/500 f/5.6 IS/OS non-zoom lens . . . [Login to view extended thread Info.]
Archived from groups: rec>photo>digital, others (more info?)

"Alan Browne" <alan.browne.RemoveThis@Freelunchvideotron.ca> wrote in message
news:q--dnXlp66wumD_VnZ2dnUVZ_tzinZ2d@giganews.com...
> Matt Ion wrote:
>>
>> Actually, a typical 1F capacitor used in car audio systems is closer to
>> the size of a coffee can (though usually in a taller, narrower form
>> factor.
>>
>> The problem with this idea is that capacitor sizes are somewhat limited
>> by the laws of physics - capacitance, or the amount of energy that can be
>> stored, is a direct factor of the size of the plates and the thickness of
>> the dielectric. A multi-farad capacitor will ALWAYS have a certain
>> minimum size, there's just no getting around it.
>
> Correct me if I'm wrong, but aren't their supercaps of 1F that are much
> smaller that that?
>

Hi there.

Try http://www.maplin.co.uk/Search.aspx?criteria=N03cq&source=15&SD=Y
for a 1F capacitor measuring 21 x 7.5mm.

Regards, Ian.

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