Petri M42 Prime

Auto Petri 1:2.8 f=28mm

28mm
f/2.8
Prime

Quick answer

The Petri Auto Petri 1:2.8 f=28mm is a wide-angle prime lens covering 28mm at f/2.8 for the M42 mount. Its bright maximum aperture handles indoor and evening light reasonably well.

About this lens

Petri Auto Petri 1:2.8 f=28mm: a manual-focus wide-angle prime lens with a 28mm focal length and a maximum aperture of f/2.8, made for M42 mount cameras. The wide view suits landscapes, architecture and environmental shots.

Petri Auto Petri 1:2.8 f=28mm specifications

Brand: Petri
Mount: M42
Focal length: 28mm
Maximum aperture: f/2.8
Lens type: Prime

What can you shoot with the Petri Auto Petri 1:2.8 f=28mm?

At 28mm this is a wide-angle prime, which typically suits:

Landscapes and cityscapes
Street and travel photography
Environmental portraits and interiors

Its bright maximum aperture handles indoor and evening light reasonably well.

Full-frame equivalent and field of view

Calculated from the focal length and crop factor (adapted mount, so sensor size depends on your camera). Not measured.

Sensor	Crop	Equivalent	Horizontal FOV	Diagonal FOV
Full frame	1.0x	28mm	65.5°	75.4°
APS-C	1.5x	42mm	46.4°	54.5°
Micro Four Thirds	2.0x	56mm	35.6°	42.2°

Try the field-of-view calculator

Frequently asked questions

What mount does the Petri Auto Petri 1:2.8 f=28mm use?

It uses the M42 mount, so it fits M42 cameras directly and can be used on other systems through a mount adapter.

What is the focal length of the Petri Auto Petri 1:2.8 f=28mm?

It is a fixed 28mm lens with a maximum aperture of f/2.8. That makes it a wide-angle lens.

Is the Petri Auto Petri 1:2.8 f=28mm a prime or a zoom lens?

It is a prime lens with a fixed 28mm focal length. Primes usually open wider than zooms; this one opens to f/2.8.

What is the Petri Auto Petri 1:2.8 f=28mm equivalent on a crop sensor?

On APS-C (1.5x crop) it frames like 42mm on full frame, with a 46.4° horizontal and 54.5° diagonal field of view. On Micro Four Thirds (2x crop) it frames like 56mm on full frame, with a 35.6° horizontal and 42.2° diagonal field of view. These figures are calculated from the focal length and crop factor.