Added a couple of new lenses to the infrared photography lens hotspot database,
the Pentax F300/4.5 and the Pentax F 35-70/3.5-4.5.
Both performed very well with no hotspots or flare issues.
The autofocus on both was fast and accurate.
I especially enjoyed the extended telephoto reach of the F300.
Can see how this lens is rated as a stellar performer and could easily become a go to lens choice.