85mm f/1.4 AS IF UMC

85mm
f/1.4
Prime

Quick answer

The Rokinon 85mm f/1.4 AS IF UMC is a short telephoto prime lens covering 85mm at f/1.4 for the Pentax K mount. Its very wide maximum aperture suits low light and shallow depth of field with strong background blur.

About this lens

A 85mm f/1.4 fast short-telephoto prime lens, the Rokinon 85mm f/1.4 AS IF UMC is designed for Pentax K mount bodies, with aspherical elements. An affordable fast manual-focus portrait prime.

Rokinon 85mm f/1.4 AS IF UMC specifications

Brand: Rokinon
Mount: Pentax K
Focal length: 85mm
Maximum aperture: f/1.4
Lens type: Prime

What can you shoot with the Rokinon 85mm f/1.4 AS IF UMC?

At 85mm this is a short telephoto prime, which typically suits:

Portraits with a flattering perspective
Events and weddings
Isolating subjects from the background

Its very wide maximum aperture suits low light and shallow depth of field with strong background blur.

Full-frame equivalent and field of view

Calculated from the focal length and crop factor. Not measured.

Sensor	Crop	Equivalent	Horizontal FOV	Diagonal FOV
Full frame	1.0x	85mm	23.9°	28.6°
APS-C	1.5x	128mm	16.1°	19.3°

Try the field-of-view calculator

Frequently asked questions

What mount does the Rokinon 85mm f/1.4 AS IF UMC use?

It uses the Pentax K mount, so it fits Pentax K cameras directly.

What is the focal length of the Rokinon 85mm f/1.4 AS IF UMC?

It is a fixed 85mm lens with a maximum aperture of f/1.4. That makes it a short telephoto lens.

Is the Rokinon 85mm f/1.4 AS IF UMC a prime or a zoom lens?

It is a prime lens with a fixed 85mm focal length. Primes usually open wider than zooms; this one opens to f/1.4.

What is the Rokinon 85mm f/1.4 AS IF UMC equivalent on a crop sensor?

On APS-C (1.5x crop) it frames like 128mm on full frame, with a 16.1° horizontal and 19.3° diagonal field of view. These figures are calculated from the focal length and crop factor.