kolarivision.com has an excellent ir lens hotspot database already compiled; however, I noticed most of my older film lenses weren’t included so decided to create a database (bottom of page) testing these lenses on the Pentax K-01.
I had the K-01 converted to full spectrum by Isaac Szabo, who did an excellent job and even calibrated the autofocus.
My test were performed with either a Hoya R72 or Cokin P007 filter in an aperture range of f5.6, f8 or f11.
Poor Performers had issues with flare or hotspots at f8 and under.
GOOD PERFORMERS OK PERFORMERS POOR PERFORMERS
Pentax K30/2.8 Vivitar PK/AR 28/2.8 Sigma EX DC 18-50/2.8 Macro
Vivitar PK 35/2.8 Pentax A35/2.8 Sigma EX DG 24-60/2.8
Pentax FA 135/2.8 Takumar F 70-200/4-5.6
Pentax M50/1.7 Kiron PK 28-105/3.2-4.5
Pentax A 50/2.8 Macro
Lensbaby / Double, Single &
Soft Focus Optics