TypeTLR
Format ClassMedium Format
Lens ConfigurationFixed
FocusMF
Focusing SystemGround glass
LensOlympus Zuiko 75mm f / 3.5 | Setagaya Koki Sekor C 75mm f / 3.5
Focal Length75mm
Max Aperture3.5
Film Format120
Nominal Format6 × 6 cm
Image Dimensions—
ShutterSeikosha-Rapid
Min Speed1s
Max Speed1 / 500s
Exposure ModesM
MeteringNo
Flash SyncX
Viewfinderwaist-level finder
Start Year1949
End Year1954
SeriesMamiya TLR
CountryJapan
Materialmetal / leather
Dimensions143x97x91mm
Weight1018g
Colorblack / chrome
ParticularitiesFirst fully automatic Mamiyaflex TLR generation; later A II and A III are distinct commercial models.
Nominal format. Exact image dimensions are not documented here.