|Posted: Fri Jul 03, 2015 3:54 am Post subject:
|LA-EA3 or LA-EA4 is made for FF or APS-C.
LA-EA1 or LA-EA2 is made for APS-C only.
LA-EA2 and LA-EA4 has build in motor and a mirror with phase detection unit. They are designed for A-mount lens without build in motor.
LA-EA1 and LA-EA3 are initially design for video camera who need no auto-focus. They have no build in motor.
For lens with build in motor(SAM or SSM), you can use any of the adapter above. However, the focus will be very slow on LA-EA1 and LA-EA3 unless it is used on the new A7R2 which support on sensor phase detection focus.
For the old A-mount lens with an aperture lever, you can use a non-electrical OEM adapter with aperture control with loss of AF.
My Flickr on street photography
List of Rodenstock Interchangeable Lenses for 35mm cameras with Serial Numbers
The best lens is the one you have with you. Life is too short to let us try every lens!
M42: CZJ Tessar 4.5/4cm, CZ Ultron 1.8/50, Fuji EBC 50/1.4, Tomioka 1.2/55 & 2.8/60, Enna 1.5/85 & 2.8/90 ...
Exakta: Angenieux 2.5/35 R1 & 2.5/90 Y12, Quinaron 2.8/35, Quinar 3.5/100, Tele-Quinar 2.8/135, RE. Auto-Topcor 4/20, 1.8/58, 1.8/85 ...
Retina S/DKL: Eurygon 2.8/30 and 4/35, Quinon 1.9/50, Heligon 1.9/50, Ysarex 2.8/50, Rotelar 4/85 and 4/135 ...
Enlargers: Hexar 3.5/75, Meopta 4.5/135, Helioplan 4,5/135, Travegar 3.5/105, Trylor 135mm F4.5 and more
RF: CZ Sonnar T 50/1.5, Jupiter 9 Zorki 1951 LTM, Canon 50/1.5 and 100/2.0
MC/MD: Minolta MD 35/1.8, 200/2.8, 500/8, Vivitar 90/2.5
FD: Komura 4/24, Vivitar 2.3/135, Canon 2.8/24 S.S.C & 4/200 Macro
Others: Agfa 90/3.4, Prakticar 1.8/80, Angulon 35/2.8, HFT 2.8/135, Ross 3.5/91, KMZ PO3-3M 2/50, Zeika 25/0.95, Sun 75mm F1.9, Kern 1.8/50 Macro and much more ...