7 Artisans 7.5mm f2.8 Fisheye for Micro Four Thirds minolta but also relatively compact: this

but also relatively compact: this camera comes with a 12" rail

but supplied here with an adapter for use with the much more common M42 lens mount

This one is designed to fit the Auto S3

This is a Mamiya waist-level viewfinder for Mamiya 645 1000S (and similar) cameras

7 Artisans 7.5mm f2.8 Fisheye for Micro Four Thirds minolta but also relatively compact: thisThe 7 Artisans 7. 5mm f2. 8 is a manual focus fisheye lens for Micro Four Thirds cameras. It's a fisheye, so there's a ton of distortion on purpose but this lens does provide corner to corner coverage. Focusing action is smooth, which is nice; the aperture action has no click stops, which is either nice or not nice, depending on your preferences. Clean glass, good function. Includes front and rear caps.