Pentax Pentax K Macro

SMC Pentax-D FA 100mm F2.8 Macro WR

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

Quick answer

A compact full-frame 100mm macro for Pentax with a weather-resistant build. It reaches 1:1 at 0.3 m, weighs about 340 g and uses 49mm filters.

Pros

True 1:1
Light at about 340 g
Weather resistant
8-bladed aperture

Cons

Screw-drive autofocus
No lens stabilization

Verdict

A light, weather-sealed macro. Pentax in-body stabilization helps with handheld use.

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 100mm F2.8 Macro 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 100mm F2.8 Macro WR?

Macro photography
Portraits
Outdoor close-ups

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

Does the Pentax D FA 100mm F2.8 Macro WR have image stabilization?

No. Pentax bodies stabilize the sensor, so shake reduction depends on the camera.

What filter size does it use?

It uses a 49mm thread. If your other lenses use a different size, step-up rings let you share filters.

How close can it focus?

Minimum focus is 0.3 m, giving 1:1 life-size magnification. The distance is measured from the sensor plane, so the working distance in front of the lens is shorter.