More than 300 mm
200 mm - 299.9 mm
150 mm - 199.9 mm
80 mm - 149.9 mm
50 mm - 79.9 mm
Less than 50 mm

Without Macro Lens
With Macro Lens

More than 80 mm
60 mm - 79.9 mm
30 mm - 59.9 mm
25 mm - 29.9 mm
20 mm - 24.9 mm
Less than 20 mm

Digital SLR
35 mm SLR
Medium Format
Other Format
Large Format

Zoom Lens
Fixed Focal Length Lens

f/2 - f/2.8
f/2.8 - f/3.5
f/3.5 - f/4
f/4 - f/5.6
Larger than f/5.6
Less than f/2

Telephoto (65 to 600mm)
Normal / Straight (35 - 65mm)
Wide Angle (21 - 35mm)
Super Wide Angle (9 - 21mm)
Fisheye (up to 9mm)
Super Telephoto (600 to 5,000mm)

Less than 30 mm
30 mm - 49.9 mm
50 mm - 89.9 mm
90 mm - 149.9 mm
150 mm - 299.9 mm
More than 300 mm

Autofocus
Manual Focus

Sigma
Nikon
Canon
Tamron
Pentax
Sony
Olympus
Tokina
Zeiss
Leica
Voigtlaender
Mamiya
Hasselblad
Contax
Phoenix Gold
Konica Minolta
Panasonic
Sea and Sea
Rodenstock
Cosina
Vivitar
Lensbabies

Nikon
Canon EF
Pentax
Sigma
Sony \ Minolta
Minolta
Canon AF
Tamron CS / M
Olympus OM
Mamiya