Nel sito www.prezzifotousato.it ho trovato tutte e due i tipi e mi chiedevo quali fossero le differenze. Ho trovato su ebay un 105 F4 micro Nikkor e il venditore non è stato in grado di dirmi quale modello è. Il prezzo è molto buono, ma poiché sempre di soldi si tratta sono in dubbio. Grazie
Guarda qui:
http://home.aut.ac.nz/staff/rvink/nikon.html
Trovi sia le specifiche che, se ti va bene, la foto in modo da poter valutare bene l'acquisto.
Dovresti però sapere anche il valore di f/ per capire bene qual'è quello che ti interessa...
Ciao
Angelo.
Per Claudio, qui sotto una sintesi delle sigle "storiche" degli obiettivi Nikon
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A: Early Nikkors, 1959
Focus ring with metal scalloped grip or with diamond pattern rubber grip.
Single coated lenses with reflections colored bright amber, light blue or magenta.
Solid aperture coupling prong.
First versions in cm, no screws in mount and engraved "Nippon Kogaku Japan".
Later versions changed to mm, then 5 screws in mount, then engraved "Nikon".
C: Multicoated lenses, 1971
Lens reflections colored dark green and purple.
Engraving ".C" added to lens designation (except early 28/2 and 35/1.4)
Otherwise identical to late A type.
K: Late pre-AI lenses, 1974
Similar in appearance to AI lenses.
Rubber focus grip with rectangle pattern, finer texture than AI lenses.
No ADR scale on aperture ring, solid aperture prong and no lens speed post at rear of lens.
AI: Auto indexing lenses, 1977
AI cam on aperture ring automatically indexes the camera meter to the lens speed.
Two rows of aperture numbers on aperture ring: main scale and smaller ADR scale.
Aperture coupling prong with cut-outs to illuminate ADR scale.
Lens speed post at rear of lens at 6 o'clock position.
AI-converted lenses, 1977
Barrel style of older lens types. No lens speed post at rear of lens.
Nikon conversions have AI-style aperture ring with ADR scale, but no lens speed post.
Home conversions by cutting existing aperture ring to form the AI ridge.
AI-S: AI with Shutter priority, 1981
Smallest aperture number colored orange on ADR scale and aperture scale.
Linear movement between rear stop-down lever and aperture, for program & shutter priority mode.
Lens type notch - small semicircular scoop at rear of lens.
Series-E, 1979
Similar to AIS but lacks aperture prong.
Greater use of plastic in contruction.
F3-AF: Autofocus for F3 camera, 1983
Built-in focus motor, 6 CPU contacts on lens mount.
Only 80/2.8 and 200/3.5 ED-IF and TC-16.
AF: Auto focus, 1986
Lens focused by motor in camera, 5 CPU contacts on lens mount.
Plastic construction, selected lenses metal with crinkle finish.
D lens transmits focus distance for improved flash metering, 1992.
G lens with no aperture ring, aperture controlled via camera, 2000.
P: CPU Lens, 1988
Manual focus lens with CPU and contacts of AF lens, for advanced operations with AF cameras.
AF-I: Lenses with integrated motors, 1992
Built-in focus motor, 10 CPU contacts on lens mount.
Manual override of AF.
Other features similar to AF-D type.
AF-S: Lenses with silent wave motor, 1996
Similar to AF-I with improved silent wave focusing motor.
-------------------------------------------------
http://home.aut.ac.nz/staff/rvink/nikon.html
Trovi sia le specifiche che, se ti va bene, la foto in modo da poter valutare bene l'acquisto.
Dovresti però sapere anche il valore di f/ per capire bene qual'è quello che ti interessa...
Ciao
Angelo.
Per Claudio, qui sotto una sintesi delle sigle "storiche" degli obiettivi Nikon
-------------------------------------------------
A: Early Nikkors, 1959
Focus ring with metal scalloped grip or with diamond pattern rubber grip.
Single coated lenses with reflections colored bright amber, light blue or magenta.
Solid aperture coupling prong.
First versions in cm, no screws in mount and engraved "Nippon Kogaku Japan".
Later versions changed to mm, then 5 screws in mount, then engraved "Nikon".
C: Multicoated lenses, 1971
Lens reflections colored dark green and purple.
Engraving ".C" added to lens designation (except early 28/2 and 35/1.4)
Otherwise identical to late A type.
K: Late pre-AI lenses, 1974
Similar in appearance to AI lenses.
Rubber focus grip with rectangle pattern, finer texture than AI lenses.
No ADR scale on aperture ring, solid aperture prong and no lens speed post at rear of lens.
AI: Auto indexing lenses, 1977
AI cam on aperture ring automatically indexes the camera meter to the lens speed.
Two rows of aperture numbers on aperture ring: main scale and smaller ADR scale.
Aperture coupling prong with cut-outs to illuminate ADR scale.
Lens speed post at rear of lens at 6 o'clock position.
AI-converted lenses, 1977
Barrel style of older lens types. No lens speed post at rear of lens.
Nikon conversions have AI-style aperture ring with ADR scale, but no lens speed post.
Home conversions by cutting existing aperture ring to form the AI ridge.
AI-S: AI with Shutter priority, 1981
Smallest aperture number colored orange on ADR scale and aperture scale.
Linear movement between rear stop-down lever and aperture, for program & shutter priority mode.
Lens type notch - small semicircular scoop at rear of lens.
Series-E, 1979
Similar to AIS but lacks aperture prong.
Greater use of plastic in contruction.
F3-AF: Autofocus for F3 camera, 1983
Built-in focus motor, 6 CPU contacts on lens mount.
Only 80/2.8 and 200/3.5 ED-IF and TC-16.
AF: Auto focus, 1986
Lens focused by motor in camera, 5 CPU contacts on lens mount.
Plastic construction, selected lenses metal with crinkle finish.
D lens transmits focus distance for improved flash metering, 1992.
G lens with no aperture ring, aperture controlled via camera, 2000.
P: CPU Lens, 1988
Manual focus lens with CPU and contacts of AF lens, for advanced operations with AF cameras.
AF-I: Lenses with integrated motors, 1992
Built-in focus motor, 10 CPU contacts on lens mount.
Manual override of AF.
Other features similar to AF-D type.
AF-S: Lenses with silent wave motor, 1996
Similar to AF-I with improved silent wave focusing motor.
-------------------------------------------------
Grazie, purtroppo è appena scaduta! Bello il link, molto interessante.
Grazie pegaso, La sigla "K" è l'unica che non conoscevo, ora sono al completo! 
