Product Overview

Built for the big country and bigger files, the Pentax FA 645 45–85mm f/4.5 is the workhorse zoom for Pentax 645 shooters. Covering everything from wide landscapes to tight portraits, it gives you a practical 35.5–67mm equivalent range with a constant f/4.5 aperture, so your exposure and look stay rock solid as you zoom. Super Multi Coating keeps flare and ghosting in check, while the 11‑element, 9‑group optical design delivers crisp detail, neutral colour and strong contrast that holds up under close inspection.

In the field it’s a no‑nonsense bit of kit: autofocus is quick to grab focus, and the push‑pull clutch lets you flick straight into manual focus when you want to fine‑tune. With a 0.5 m minimum focus distance and 0.22x magnification, it’s handy for close‑ups of gear, wildlife or detail shots without swapping lenses. The robust build, Pentax 645 mount compatibility (film and digital) and supplied petal hood make it a dependable lens for Aussie shooters who need one zoom that can stay on the camera from first light to last.

Key Features

• Versatile 45–85mm zoom range (35.5–67mm equivalent) covers wide-angle to short telephoto, ideal for landscapes, portraits and general-purpose shooting.
• Constant f/4.5 maximum aperture maintains consistent exposure and depth of field control throughout the zoom range, simplifying work in changing light.
• Advanced optical design with 11 elements in 9 groups delivers sharp images with strong contrast, supporting high-resolution medium format sensors.
• Super Multi Coating (SMC) minimises ghosting and flare, improving clarity and colour accuracy when shooting backlit scenes or in harsh sunlight.
• Push–pull clutch mechanism enables quick switching between autofocus and manual focus, giving precise control when fine-tuning critical focus.
• Eight-blade diaphragm produces smooth, rounded bokeh, enh...