Re: Auto focus lenses for IR?

[George L Smyth <GLSmyth@xxxxxxx>]

Andrew Frazer wrote:
> 
> I've been shooting all my HIE through manual focus Olympus clones
> (Tokina, Sakkar).  I've been noticing the increasing difficulty
> finding manual focus lenses these days.  I asked the sales droid
> if any of the autofocus lenses could compensate for IR focusing,
> and he said, "yeah, some of them."  But I don't think he knew
> what he was talking about.
> 
> Does anyone know if this is true?  Can any of the new AF lenses
> from any of the major camera manufacturers compensate for IR
> focusing?

There are some lenses that will do this, but you will have to research this. 
Apochromatic correction normally deals only with visible light, but some lenses
extend this to infrared radiation.  I'm not sure which ones they are.

george

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