Rolleinar-MC 21mm F/4

Specifications01

MountROLLEI QBM

Focal length21mm

Max aperturef/4

TypeWide · Prime

Release year1977

Weight245 g

Filter size58 mm

Min focus distance0.45 m

Aperture blades5

Optical elements9

Groups8

AutofocusNo

StabilizationNo

Aperture controlAperture ring (Manual settings only)

TeleconvertersNot compatible

EraFilm era

Production statusDiscontinued

Additional Info02

Lens TypeUltra-wide angle prime lens

Summary02

21mm f/4 wide-angle lens for Rollei QBM mount, intended for wide scenic or interior shots. Uses a fixed maximum aperture of f/4.

AI-assisted summary — verify against linked sources

Specifications from thelensdb

Where can this lens be adapted?

The Rollei QBM mount has a flange distance of 44.5 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work

Sony EAdapter · 26.5 mm
Canon RFAdapter · 24.5 mm
Nikon ZAdapter · 28.5 mm
Fujifilm XAdapter · 26.8 mm
L-MountAdapter · 24.5 mm
Micro Four ThirdsAdapter · 25.25 mm
Fujifilm G (GFX)Adapter · 17.8 mm
Covers full-frame: it can vignette on a medium format sensor.
Canon EF-MAdapter · 26.5 mm

No plain adapter reaches infinity focus on: Canon EF, Nikon F.

Sources03

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Other Mounts03

No alternate mounts are indexed for this family yet.