Tag Archives: RLI

Relative Light Index for Nikon prime lenses

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The table below displays the RLI value for all Nikon prime lenses:

NameLens in mmFISORLI
Nikon 10.5mm f/2.8G ED DX Fisheye AF10,52,82002430
Nikon 14mm f/2.8D ED AF Nikkor142,82001822
Nikon 16mm f/2.8D AF Fisheye-Nikkor162,82001594
Nikon 18mm f/2.8D AF Nikkor182,82001417
Nikon 20mm f/2.8D AF Nikkor202,82001276
Nikon 24mm f/1.4G ED AF-S Nikkor241,42004252
Nikon 24mm f/2.8D AF Nikkor242,82001063
Nikon 24mm f/3.5D ED PC-E Nikkor243,5200680
Nikon 28mm f/1.4D AF Nikkor281,42003644
Nikon 28mm f/2.8D AF Nikkor282,8200911
Nikon 35mm f/1.4G AF-S NIKKOR351,42002915
Nikon 35mm f/1.8G AF-S DX Micro-Nikkor351,82001764
Nikon 35mm f/2D AF Nikkor3522001429
Nikon 50mm f/1.4D AF Nikkor501,42002041
Nikon 50mm f/1.4G AF-S Nikkor501,42002041
Nikon 50mm f/1.8 AF Nikkor501,82001235
Nikon 50mm f/1.8D AF Nikkor501,82001235
Nikon 60mm f/2.8D AF Micro-Nikkor602,8200425
Nikon 60mm f/2.8G ED AF-S Micro-Nikkor602,8200425
Nikon 85mm f/1.4D IF AF Nikkor851,42001200
Nikon 85mm f/1.8D AF Nikkor851,8200726
Nikon 85mm f/2.8 PC Micro-Nikkor852,8200300
Nikon 105mm f/2.8 ED-IF AF-S VR Micro-Nikkor1052,8200486
Nikon 105mm f/2.8D AF Micro1052,8200243
Nikon 135mm f/2D AF-DC Nikkor1352200370
Nikon 180mm f/2.8D ED-IF AF Nikkor1802,8200142
Nikon 200mm f/2G IF-ED AF-S VR2002200500
Nikon 200mm f/4D ED-IF AF Micro-Nikkor200420063
Nikon 300mm f/2.8D ED-IF II AF-S3002,820085
Nikon 300mm f/2.8G IF-ED AF-S VR3002,8200170
Nikon 300mm f/4 ED-IF AF-S Nikkor300420042
Nikon 400mm f/2.8D IF-ED AF-S II Nikkor4002,820064
Nikon 400mm f/2.8G ED VR AF-S5002,8200102
Nikon 500mm f/4D IF-ED AF-S II Nikkor500420025
Nikon 500mm f/4G ED VR AF-S500420050
Nikon 600mm f/4D ED-IF AF-S Nikkor600420021
Nikon 600mm f/4D IF-ED AF-S II Nikkor600420021
Nikon 600mm f/4G ED VR AF-S600420042

Relative Light Index for photocameras

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I have developed a mathematical formula to compare the light sensitivity for photo camera lenses.

A twice as high value means that the lens will receive twice as much light. The formula and equation are linear.

The relative light index of a camera can be calculated as followed:

RLI = ( 1/lens mm ) * (F^2) * ISO value

This initial formula doesn`t correct for VR or OS (whatever name you prefer).
Therefore I adapted the formula to compensate for this

RLI = ( 1/lens mm ) * (F^2) * ISO value * VR (if not, 1  | if yes 2)

Because these values are very small (below 5) its recommended to multiply them with 1000 to create a  more easy to read value.