MINOLTA AF 28-70mm f/2.8 G

JP1994-082698 A — Yoshinobu Asakura

16 ELEMENTS / 11 GROUPS
4-GROUP N-P-N-P ZOOM
28.7 / 50.0 / 68.3mm DESIGN STATES
F/2.87 DESIGN
2 ASPHERICAL SURFACES

Focus Mechanism

NO_INTERNAL_RECONSTRUCTION: patent zoom states are modeled at infinity/design focus only; production MFD 0.85 m does not determine the internal close-focus motion.

Optical Elements (16 physical)

ElementTypeGlass
L1Negative Meniscus847239 (vendor identity not source-defensible)
L2Biconvex Positive800422 (vendor identity not source-defensible)
L3Neg. Meniscus (1× Asph)743493 (vendor identity not source-defensible)
L4Biconcave Negative583594 (vendor identity not source-defensible)
L5Positive Meniscus847239 (vendor identity not source-defensible)
L6Negative Meniscus847239 (vendor identity not source-defensible)
L7Biconvex Positive668419 (vendor identity not source-defensible)
L8Biconvex Positive729547 (vendor identity not source-defensible)
L9Negative Meniscus847239 (vendor identity not source-defensible)
L10Biconcave Negative517696 (vendor identity not source-defensible)
L11Negative Meniscus487702 (vendor identity not source-defensible)
L12Positive Meniscus847239 (vendor identity not source-defensible)
L13Biconvex Positive (1× Asph)622532 (vendor identity not source-defensible)
L14Biconvex Positive618634 (vendor identity not source-defensible)
L15Negative Meniscus785257 (vendor identity not source-defensible)
L16Negative Meniscus805254 (vendor identity not source-defensible)