Sigma Mirror 400mm F/5.6

Specifications01

MountM42

Focal length400mm

Max aperturef/5.6

TypeMirror · Telephoto · Prime

Summary02

Sigma Mirror 400mm f/5.6 is a fixed focal-length mirror (catadioptric) telephoto lens for long-distance shooting, typically for wildlife or astronomy. It uses a mirror design rather than conventional glass for focusing optics.

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Specifications from kentfaith

Where can this lens be adapted?

The M42 screw mount has a flange distance of 45.46 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work

Many M42 lenses close the aperture only when a pin at the rear is pressed. Use an adapter that presses the pin, or set the A/M switch to M.

Sony EAdapter · 27.46 mm
Canon RFAdapter · 25.46 mm
Nikon ZAdapter · 29.46 mm
Fujifilm XAdapter · 27.76 mm
L-MountAdapter · 25.46 mm
Micro Four ThirdsAdapter · 26.21 mm
Fujifilm G (GFX)Adapter · 18.76 mm
Covers full-frame: it can vignette on a medium format sensor.
Canon EF-MAdapter · 27.46 mm
Canon EFAdapter · 1.46 mm
A rear element that sticks out can hit the camera mirror.