I have never owned a zoom that didn't change focus slightly from wide to long. I've also never owned a really expensive one.
William M. Kane wrote:
This is interesting:
I bought my specimen of this lens from a gentleman who took very good care of his equipment, and there were no signs of damage to the lens. My lens has NEVER maintained focus throughout a zoom. Are you sure it's supposed to do so?
Il Bill On Jul 27, 2004, at 9:29 PM, Alan Chan wrote:
I would like to add that if the focus did change when zoom, don't be tempted to have it serviced afterward because it is a complex lens to work with (and I think most technicans won't bother to spend enough time to calibrate it properly). Besides, this lens appears on eBay regularly.
Alan Chan http://www.pbase.com/wlachan
Thanks Alan, that gives me a couple of good questions to ask the seller.
Don
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