# Rokkor Lens Code

Auto Rokkor-PF f/1.4 58mm image by Dirk HR Spennemann (Image rights) |

Minolta employed a two-letter alphanumeric system as a code for the optical design of its lenses. The first letter sets out the number of lens groups, while the second letter sets out the number of lens elements.^{[1]}

## Codes

**First Letter:**

- T- Tri
- Q - Quatro / Quadr
- P - Penta
- H - Hexa
- S - Septi
- O - Octo
- N - Novem

**Second letter:**

C=3, D=4, E=5, etc

## Examples

ROKKOR-TC = 3 lens elements in 3 lens groups

ROKKOR-TD = 4 lens elements in 3 lens groups

ROKKOR-QD = 4 lens elements in 4 lens groups

ROKKOR-QE = 5 lens elements in 4 lens groups

ROKKOR-QF = 6 lens elements in 4 lens groups

ROKKOR-QH = 8 lens elements in 4 lens groups

ROKKOR-PE = 5 lens elements in 5 lens groups

ROKKOR-PF = 6 lens elements in 5 lens groups ^{[2]}

ROKKOR-PG = 7 lens elements in 5 lens groups

ROKKOR-PH = 8 lens elements in 5 lens groups

ROKKOR-PI = 9 lens elements in 5 lens groups

ROKKOR-HF = 6 lens elements in 6 lens groups

ROKKOR-HG = 7 lens elements in 6 lens groups

ROKKOR-HH = 8 lens elements in 6 lens groups

ROKKOR-SG = 7 lens elements in 7 lens groups

ROKKOR-SI = 9 lens elements in 7 lens groups

ROKKOR-OK = 11 lens elements in 8 lens groups

ROKKOR-NJ = 10 lens elements in 9 lens groups

ROKKOR-NL = 12 lens elements in 9 lens groups

## Notes

- ↑ This information has been gleaned from a series of contributions by John Goddard and Eugene Ilchenko on the Internet Directory of Camera Collectors listserver
- ↑ Examples in the camera-wiki pool at Flickr: Auto Rokkor-PF f/1.4 58mm; MC Rokkor-PF f/1.7 50mm (old version); MC Rokkor-PF f/1.7 50mm (new version)