> On Fri, 8 Dec 2000, Jay D. Washington wrote:
> ... the "500" or "250" on the canon filters represents the minimum
> focusing distance when set at infinity, and the "D" means the filter
> is a two-element type. The 250's are for shorter focal length lenses,
> while the 500's are for longer lenses. I often carry a 500D with my
> 100-400mm IS and it gives exellent results. ...
Hi JDW,
You made an interesting point about the 500D (+2 diopter) and 250D (+4
diopter) close-up adapter lenses.
I have limited experience in macro photography. I recently bought a 250D
in 72mm mount that I use for the 28-135mm IS and the 100-400mm IS.
There is a severe problem with the 28-135 and 250D: the 250D is quite a
heavy accessory, and with the lens pointed down, the zoom barrel creeps to
the longest setting. @#(&$@(^! There is no zoom lock, like on the
100-400.
Is the 500D any lighter?
Cheers
Julian Loke
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