Thermography

[jackiex_x]

is there such a thing as a lens/filter for a dslr to do this?

 

[Josh66]

Probably not on a dslr... Not just by slapping a filter on anyway...

You can do UV and IR, but that's just reflected light - not the same as thermal imaging...

 

[dxqcanada2 1]

Wikipedia:

Thermal imaging cameras detect radiation in the range of the electromagnetic spectrum (roughly 9000–14,000) nanometers or 9–14 µm and produce images of that radiation, called thermograms.

The sensors used in your typical DSLR is not designed with that level of sensitivity.

 

[480sparky44 44]

is there such a thing as a lens/filter for a dslr to do this?

Nope.