Pentax Pentax K Macro

smc Pentax-D FA Macro 100mm f/2.8 WR

100mm
f/2.8
Macro
340 g
Min focus 0.3 m

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Quick answer

The Pentax smc Pentax-D FA Macro 100mm f/2.8 WR is a short telephoto macro lens covering 100mm at f/2.8 for the Pentax K mount. Its bright maximum aperture handles indoor and evening light reasonably well.

About this lens

This 100mm f/2.8 macro lens from Pentax fits Pentax K mount cameras, with weather-resistant construction. It is intended for close-up work with small subjects such as flowers and insects.

Pentax smc Pentax-D FA Macro 100mm f/2.8 WR specifications

Brand: Pentax
Mount: Pentax K
Focal length: 100mm
Maximum aperture: f/2.8
Lens type: Macro
Format coverage: full-frame
Released: 2009
Optical construction: 9 elements in 8 groups
Aperture blades: 8
Autofocus motor: screw-drive
Minimum focus distance: 0.3 m
Maximum magnification: 1x
Filter thread: 49 mm
Weight: 340 g
Diameter: 65 mm

Specification source: en.wikipedia.org

What can you shoot with the Pentax smc Pentax-D FA Macro 100mm f/2.8 WR?

At 100mm this is a short telephoto macro, which typically suits:

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

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. Not measured.

Sensor	Crop	Equivalent	Horizontal FOV	Diagonal FOV
Full frame	1.0x	100mm	20.4°	24.4°
APS-C	1.5x	150mm	13.7°	16.4°

Try the field-of-view calculator

Frequently asked questions

What mount does the Pentax smc Pentax-D FA Macro 100mm f/2.8 WR use?

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

What is the focal length of the Pentax smc Pentax-D FA Macro 100mm f/2.8 WR?

It is a fixed 100mm lens with a maximum aperture of f/2.8. That makes it a short telephoto lens.

Is the Pentax smc Pentax-D FA Macro 100mm f/2.8 WR a prime or a zoom lens?

It is a prime lens with a fixed 100mm focal length. Primes usually open wider than zooms; this one opens to f/2.8.

What is the Pentax smc Pentax-D FA Macro 100mm f/2.8 WR equivalent on a crop sensor?

On APS-C (1.5x crop) it frames like 150mm on full frame, with a 13.7° horizontal and 16.4° diagonal field of view. These figures are calculated from the focal length and crop factor.