While most auto-focus lens designs were new developments, some optical constructions were derived from Minolta SR-mountlenses. In the United States, the Maxxum system launched in 1985 with twelve lenses:[1]
24mm f/2.8
28mm f/2.8
50mm f/1.4
50mm f/1.7
50mm f/2.8 Macro
135mm f/2.8
300mm f/2.8 APO
28–85mm f/3.5–4.5
28–135mm f/4–4.5
35–70mm f/4
35–105mm f/3.5–4.5
70–210mm f/4
When the second camera, the 9000, was launched later in 1985, two more lenses were added: the 75–300 mm f/4.5–5.6 and 600 mm f/4 APO.[2] By 1986, Minolta had expanded the lineup by releasing 16 mm f/2.8 fisheye, 20 mm f/2.8, 28 mm f/2, 100 mm f/2.8 Macro, 200 mm f/2.8, and 100–200 mm f/4.5 lenses.[3]: 28
Restyled ("i" series)
Restyled 35–105mm f/3.5–4.5
Original design
"New" or "Restyled", including optical design changes to make lens more compact
Initially, the lenses were equipped with narrow ribbed manual focus rings in hard plastic near the front; most lenses had a diagonally-ribbed rubber grip, which was used as the zoom ring on zoom lenses. Starting in 1988 with the release of the "i" series cameras, new lenses were released with an updated grip style featuring broader, rounded diagonal shapes and a rubber coated focus ring. These new lenses included 35–80 mm f/4–5.6 (with built-in lens cap), 80–200 mm f/4.5–5.6, 35–105 mm f/3.5–4.5, 70–210 mm f/3.5–4.5, and 100–300 mm f/4.5–5.6.[4]
Some of the original lenses were updated and re-released with the same cosmetics and are known as "New" or "Restyled" versions; minor optical updates such as coatings and aperture shape were sometimes included.[5] Lens labeling varies slightly; lenses with the original style are marked "AF Lens" on the side of the lens with the focal length(s), while restyled lenses are marked "AF" in a rounded typeface with focal length(s), but without "Lens".[6]
8-pin ("xi" series) and distance encoding
Electronic contact variations
Initial 5-pin contact scheme (50mm f/1.7)
ADI-compatible 8-pin contact (85mm f/1.4 G)
When the "xi" series cameras were introduced with the 7xi in 1991, new and updated lenses were released with three additional contacts (eight total) to support an in-lens motor for body-controlled power zoom, which was used by the "fuzzy logic" system in that camera body.[7][8] The power zoom function was touted to "automatically [provide] a suggested composition" in dealer marketing materials.[9]: 9–10 Five lenses were released with power zoom features, which are equipped with a single control ring that combines both manual focusing and zoom functions,[10] and are marked as "Zoom xi" lenses:[11]: 108
28–80mm f/4–5.6
28–105mm f/3.5–4.5
35–200mm f/4.5–5.6
80–200mm f/4.5–5.6
100–300mm f/4.5–5.6
Later, with the introduction of the Maxxum/Alpha 7 and its support for distance-encoded HS(D) flashes in 2001, Minolta began fitting all lenses with the three additional contacts, repurposed to support the Advance Distance Integration (ADI) functionality, which reports the focus distance back to the camera body.[12]
Branding updates
Lenses were branded as "Konica Minolta" starting in August 2003 following the merger of the two companies.[13]
When Sony took over the system in 2006,[14] 12 lenses were rebranded as Sony A-mount lenses and launched alongside 6 new designs and 2 teleconverters.[15] Of the dozen rebranded lenses, most are optically, mechanically and electrically identical to their Minolta predecessors and differ only in their outer appearance, however, three have seen subtle changes in the optics and electro-mechanics. The 20 lenses relaunched in 2006 included:[15]
16mm f/2.8 (legacy)
20mm f/2.8 (legacy)
28mm f/2.8 (legacy)
35mm f/1.4 G (new)
50mm f/1.4 (legacy)
50mm f/2.8 Macro (legacy)
85mm f/1.4 Zeiss (new)
100mm f/2.8 Macro (legacy)
135mm f/1.8 Zeiss (new)
135mm f/2.8 STF (legacy)
300mm f/2.8 G (new)
500mm f/8 Reflex (legacy)
11–18mm f/4.5–5.6 (legacy)
16–80mm f/3.5–4.5 Zeiss (new)
18–70mm f/3.5–5.6 (legacy)
18–200mm f/3.5–6.3 (legacy)
70–200mm f/2.8 G (new)
75–300mm f/4.5–5.6 (legacy)
1.4× Teleconverter
2.0× Teleconverter
All Minolta and Konica Minolta A-mount lenses are compatible with Sony A-mount cameras.
Regional variations
Regional variations for Minolta 50mm f/1.7 lenses
Early "crossed-X" Maxxum, which prompted a lawsuit from Exxon
Branded as "Maxxum AF" for the North American market (original version with hard ribbed plastic focus ring)
Branded as "AF" for the rest of the world ("New" version with rubber focus ring)
In North America, Minolta marketed the camera and lenses with the Maxxum branding. Until the mid 1990s, A-mount lenses for the North American market were engraved as Maxxum AF; the rest of the world were branded as AF lenses, including the regions using the Dynax and α branding for the cameras. The initial production runs of Maxxum AF lenses introduced with the camera system in 1985 originally used a "crossed XX" font, which was soon dropped by Minolta after Exxon brought a trademark lawsuit that year; under the settlement, Minolta agreed to change its logo.[16]
Although some buyers associated either the Maxxum AF or the AF designation with a higher quality, both types of lenses were built to exactly the same specifications and quality standards in the factory, and were only used to improve trackability and distinguish gray market imports (lenses originally purchased from international sources and resold in North America by private importers rather than official imports from Minolta). They differed only in their cosmetics (name plate engraving) and part number designations (????-1?? for AF, ????-6?? for Maxxum AF). A similar scheme previously had been used by Minolta in the 1960s and 1970s to distinguish their Rokkor and Rokkor-X branding variants for SR-mount lenses.
7-digit serial number; no CLR front filter; tripod knob to the right;[42] without "High Speed" gearing and sticker and without focus-stop buttons; optically based on an SR-mountMinolta MD Apo Tele Rokkor 300mm f/2.8 prototype;[43] white finish
8-digit serial number; with CLR front filter; tripod knob to the left; without "High Speed" gearing and sticker and without focus-stop buttons; white finish
8-digit serial number; with CLR front filter; tripod knob to the left; with "High Speed" gearing, but without "High Speed" sticker and without focus-stop buttons; white finish
Specially calibrated lens with fixed focus and fixed aperture for camera service; optics based on Minolta AF 50mm f/1.7 (2550-100, 2550-600); cannot be used for normal photography; black finish
Notes
^All lenses are designed cover the 35mm format with the exception of the "DT" lenses (11–18, 18–70 and 18–200), which cover APS-C.
^Lenses with a "distance encoder" provide subject distance information for utilization in the Advanced Distance Integration (ADI) flash mode and other features. While the "(D)" designation is used on the box and in the documentation, the lenses just feature a "D" instead. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature.
^ abcDT is "Digital Technology", lenses for cameras with APS-C (or Super-35mm) size sensors, only. DT lenses will not fully illuminate the sensor/film area of 24×36mm full-frame cameras. Three DT lenses were made and sold by Konica Minolta: 11–18, 18–70, and 18–200mm.
"Distance encoder", lens provides subject distance information for utilization in the Advanced Distance Integration (ADI) flash mode and other features. While the "(D)" designation is used on the box and in the documentation, the lenses just feature a "D" instead. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature.
DT
"Digital Technology", lenses for cameras with APS-C (or Super-35mm) size sensors, only. DT lenses will not fully illuminate the sensor/film area of 24×36mm full-frame cameras. Three DT lenses were made and sold by Konica Minolta: 11–18, 18–70, and 18–200mm.
G
"Gold" series, Minolta's line-up of high-grade lenses. The "G" status does not occur as label on the lenses, but is indicated by a decorating ring on the lens.
High Speed
High Speed upgraded gearing for faster autofocus. As indicated, three lenses were upgradeable in authorized service centers as well.
II
Version II. Some lenses underwent more than just cosmetic changes, and are referred to as second version, in particular, when the optics have changed completely.
New
Restyled (not a designation found on the lens), aesthetic changes (such lenses were labelled "New" or "Neu" or "(N)" on the box and in the documentation by Minolta, but not specifically labelled on the lens itself).
SSM
"SuperSonic Motor", silent in-lens ultrasonic motor used on some lenses. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature. Can be used with manual focusing on cameras without SSM support (that is, Minolta film bodies released before 2000 - Minolta Dynax/Maxxum/α-9/9Ti can be upgraded by service).[63][64][65][66]
Power or xi
Motorized zoom. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature.