Sony A99- Infrared Photography
I think that the a99 with an IR filter can take IR photos as long as you keep the exposure long enough as is the case with almost any other digital camera.
You can of course modify the sensor and remove the IR filter, but it is costly and will require the readjustment of the auto-focus to suit specific lenses. I think that you would be much better off doing this sort of conversion on a NEX.
|_F0A5334-Edit_small by Dester Wallaboo|
from Open Air Fashion Photography
|Feed me, me, me, me, me by Denjw|
from Attention-Seekers in Nature