Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "lulalake_1999"
<lulalake_1999@y...> wrote:
> John,
> 
> Thanks for your reply. It's my understanding that the Bayer filter is 
> more or less impossible to remove without destroying the sensor. Is 
> this your understanding?
> 
> Also since Foveon has no Bayer filter it would seem that Sigma cameras 
> might be an excellent candidate for IR conversion, based on the sensor. 
> Unfortunately I haven't seen many examples of a Sigma conversion, 
> plenty of Canons and Sonys.

That's because there's no such thing as a "Sigma conversion". It
doesn't need one ;)

On the Sigma SD10, the IR blocking filter is incorporated in an
optical window (called the "dust protector") right behind the lens
mount. It is removable for cleaning. All you have to do is remove one
screw, put the dust protector someplace safe, and you're good to go.
The camera even comes with the screwdriver (and the procedure for
removing the dust protector is documented in the manual).

So, in the field, in 2 minutes flat, you can switch your Sigma SD10 to
IR, or back to visible light.

The IR performance is excellent. The Sigma forum on dpReview maintains
a large user gallery on pBase, and you can see many fine examples there.

I typically tell people the SD10 is the best camera currently on the
market for IR. And it's very good for near UV, too.

Note that the older Sigma SD9 has its IR blocking filter on the
surface of the sensor window, and you can't remove it without doing a
lot of damage. You want SD10.