Paul Stenquist wrote:
> On Nov 10, 2006, at 4:44 PM, J. C. O'Connell wrote:
>>  the camera makers
>> themselves even tell you to focus at longest
>> setting and then zoom to length you want
>> because its easier to focus accurately at
>> longer lengths
> 
> This is not a good way to work. Most lenses aren't precise enough to  
> hold accurate focus while zooming.
> 

And many shift focus when zooming.

-Adam

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