"Lens used (Exif:Lens)" is a predefined property of type Text. This property is pre-deployed (also known as special property) and comes with additional administrative privileges but can be used just like any other user-defined property.
B
EF100-400mm f/4.5-5.6L IS II USM +
EF-S18-200mm f/3.5-5.6 IS +
EF-S18-200mm f/3.5-5.6 IS +
C
EF400mm f/5.6L USM +
E
EF100-400mm f/4.5-5.6L IS II USM +
EF70-300mm f/4-5.6L IS USM +
EF70-300mm f/4-5.6L IS USM +
G
60.0 mm f/2.8 +
H
DT 18-70mm F3.5-5.6 +
M
60.0 mm f/2.8 +
N
DT 18-70mm F3.5-5.6 +
150.0-500.0 mm f/5.0-6.3 +
P
EF500mm f/4L IS USM +
EF70-200mm f/4L IS USM +
R
EF300mm f/4L IS USM +
T
EF500mm f/4L IS USM +
W
4.4-17.7 mm f/3.5-4.6 +
Y
5.0-100.0 mm +