Finder Magnification -three types - 　(BESSA A Serieses is Production Discontinued)

x0.7 Standard Finder
Can cover from 35mm, 50mm standard to 75/90mm telephoto lens.

x1.0 Life Size Finder
Photographers can shoot the pictures with their both eyes open naturally.
Can cover 40/50mm standard lens and 75/90mm telephoto lens

x0.52 Super Wide finder
Needless to attach 21/25mm viewfinders because the camera comes with 21/25 frame lines.
Also, can cover 28/35mm wide lens and 50mm standard lens.
Shutter mechanism -two types-

Full Mechanical Shutter
Do not require batteries to fire shutter.
Precise shutter operation: Shutter speed from 1/2000 to 1 sec.

TTL metering system
LED indicator at the bottom of finder tells you proper exposure at once.

Exposure priority
Proper shutter speed at the bottom of the finder will light up.

Exposure Compensation
+/-2 EV on AE by rotating the shutter speed dial

AE lock
Useful when the shooting at backlight
Button is located just under the advance lever.
AE will be locked only when the button is depressed.

Manual
Manual shooting is also possible.
The shutter speed you set will be indicated in the finder.