All F models can be distinguished from other because there is a letter F in front of the serial number. Type 1 does not accept the optically flat glass provision while the subsequent types do. There fore it lacks the pressure plate release pin near the right hand film channel.
Other features : Removeable hood with sports finder, Fresnel viewing screen, No EVS system, MX synchronization and V (self-timer) controlled by the same lever MXV, Double exposure provision, baffles, exposure guide on door, coupled aperture and shutter controls. The F type introduced the feature of a cross coupled exposure meter. On previous Rolleis after operating the meter one had to set the shutter and /or apertures.
Factory designation : Rolleiflex 3,5 F
Dates : November 1959 – 1960.
Serial numbers , above nameplate : 2,250 000 – 2,815 050
Taking lens : 75mm f/3.5 Zeiss Planar or Schneider Xenotar.
Finding lens : 75mm F2.8 Heidosmat.
Shutter : Synchro – Compur MXV. 1—1/500 sec.
Bayonet size : Size II
Removeable finder : Yes.
Light meter : Yes. ( extra feature )
Focusing screen : removeable.
Dimensions : 142 x 108 x 108mm
Weight : 1162 gram.