Julian Loke wrote:
>
> > "Ken Durling" <[EMAIL PROTECTED]> wrote:
> > What would happen if you stacked two 500Ds?
>
> Hi Ken,
>
> The Canon 500D is a +2 diopter lens. Adding two of them
> together would yield a STRONGER power of +4 diopter
> (equivalent to having a 250mm lens).
>
> If you need +4D, you might get better quality at a lower
> price from a double-element Canon 250D
>
> Or if you are perverse, use a EF 200mm f/2.8L lens in
> reverse as a nine-element +5 Diopter close-up %-)
>
If you really need this, there is a 1200D available from Canon.
It's quite heavy and expensive and I'm not sure you can mount it
reversed on a 80-200L lens ;-))))) Must be the most expensive
close uplens in the world.
BTW, stacking lenses reversed can really work quite well with
some combinations and is an el cheapo way to get extreme
magnifications beyond 1:1. I've used the 50/1.4 reversed on the
200/2.8L and they do quite well at 4:1. Of course the combo is nowhere
near a specialised lens for this purpose, which is available for
some mounts, probably also in T-mount, which can be adapted to EOS.
Thomas Bantel
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