Another unique feature of the SR-T 101 besides the open aperture metering at the time of its release to the public at Photokina in 1966 was the so called "CLC"-metering characteristic.

"CLC" stands for "contrast-light-compensation" and was a kind of an early Matrix metering: Two CdS-cells, placed at the front and rear end of the viewfinder prism, provide an overlapping coverage of the center-weighted light-detection area and are electronically coupled together.

Shutter speed and match needle exposure is visible in the viewfinder, including a battery check index mark showing the required meter needle deflection for a healthy battery when the ON/OFF meter switch on the camera base is set to BC.

The MC refers to the aperture meter coupling, required to operate properly on the SR-T 101, and the PF to the lens construction comprising a five group design using six glass elements.

[citation needed] A new line of Rokkor lenses were launched with the camera featuring the MC full-aperture metering:[4] These had 55 mm filter threads except where noted.