Difference between revisions of "Rokkor Lens Code"
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| − | [[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.<ref>This information has been gleaned from a series of | + | [[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.<ref>This information has been gleaned from a series of contributions by John Goddard and Eugene Ilchenko on the Internet Directory of Camera Collectors listserver</ref> |
| − | + | ==Codes== | |
<b>First Letter:</b> | <b>First Letter:</b> | ||
*T- Tri | *T- Tri | ||
| Line 24: | Line 24: | ||
| − | + | ==Examples== | |
ROKKOR-TC = 3 lens elements in 3 lens groups<br> | ROKKOR-TC = 3 lens elements in 3 lens groups<br> | ||
ROKKOR-TD = 4 lens elements in 3 lens groups<br> | ROKKOR-TD = 4 lens elements in 3 lens groups<br> | ||
| Line 32: | Line 32: | ||
ROKKOR-QH = 8 lens elements in 4 lens groups<br> | ROKKOR-QH = 8 lens elements in 4 lens groups<br> | ||
ROKKOR-PE = 5 lens elements in 5 lens groups<br> | ROKKOR-PE = 5 lens elements in 5 lens groups<br> | ||
| − | ROKKOR-PF = 6 lens elements in 5 lens groups <ref>Examples in the camera-wiki pool: [http://www.flickr.com/photos/heritagefutures/5819963973 Auto Rokkor-PF] f/1.4 58mm; [http://www.flickr.com/photos/49656291@N00/4349223003/ MC Rokkor-PF f/1.7] 50mm (old version); [http://www.flickr.com/photos/heritagefutures/4618596388/ MC Rokkor-PF] f/1.7 50mm (new version) </ref><br> | + | ROKKOR-PF = 6 lens elements in 5 lens groups <ref>Examples in the camera-wiki pool at Flickr: [http://www.flickr.com/photos/heritagefutures/5819963973 Auto Rokkor-PF] f/1.4 58mm; [http://www.flickr.com/photos/49656291@N00/4349223003/ MC Rokkor-PF f/1.7] 50mm (old version); [http://www.flickr.com/photos/heritagefutures/4618596388/ MC Rokkor-PF] f/1.7 50mm (new version) </ref><br> |
ROKKOR-PG = 7 lens elements in 5 lens groups<br> | ROKKOR-PG = 7 lens elements in 5 lens groups<br> | ||
ROKKOR-PH = 8 lens elements in 5 lens groups<br> | ROKKOR-PH = 8 lens elements in 5 lens groups<br> | ||
| Line 45: | Line 45: | ||
ROKKOR-NL = 12 lens elements in 9 lens groups | ROKKOR-NL = 12 lens elements in 9 lens groups | ||
| − | == Notes | + | == Notes== |
<references /> | <references /> | ||
[[Category: Minolta| Minolta]] | [[Category: Minolta| Minolta]] | ||
Latest revision as of 14:02, 18 September 2020
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| 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)
