Product Overview

Built for the Pentax 645 system, the FA 645 150–300mm f/5.6 ED(IF) is your long‑reach workhorse when you’re chasing detail across big country. Covering a versatile telephoto range equivalent to roughly 118–236mm in 35mm terms, it lets you lock onto distant subjects with tight framing and natural compression – ideal for wildlife, sport, and isolating landscapes without having to move your feet. Extra‑low dispersion glass keeps contrast high and chromatic aberrations in check, while the Super Protect coating helps the front element shrug off dust and minor scratches when you’re working hard outdoors.

A constant 2m minimum focus distance throughout the zoom range and 0.18x maximum magnification at 300mm give you handy close‑up capability without crowding your subject. The internal focusing and internal zoom design keep the lens length and balance stable as you work, so it handles predictably on both 645 film bodies and digital 645D/645Z. AF/MF switching is quick and intuitive – just slide the focus ring – and you can fine‑tune manually after autofocus locks, making it easy to nail critical focus on demanding shots. Compact for its reach, with a 67mm filter thread and supplied hood, this lens is a dependable telephoto solution for Pentax medium‑format shooters who need reach, reliability and clean, punchy files straight out of the camera.

Key Features

• 150–300mm telephoto zoom range (118–236mm equivalent in 35mm format) gives you flexible reach for wildlife, sports and distant landscapes without changing lenses.
• Constant f/5.6 maximum aperture with fully automatic diaphragm control delivers consistent exposure and smooth operation throughout the zoom range.
• Extra-low dispersion (ED) glass elements increase contrast and reduce chromatic aberration, producing cleaner, sharper images across the frame.
• Inner focusing and inner zoom design minimise changes in overall length and balance, improving handling and stability when focusing or zooming.
• Minimum focusing distance of 2m and 0.18x maximum magnification at 300mm allow for tight framing of subjects while maintaining comfortable working distance.
• Quick AF/MF switching via the sliding focus ring lets you move instantly between autofocus and manual focus for precise fine-tuning.
• Eight-blade diaphragm helps create pleasing, rounded out-of-focus highlights for attractive background blur in telephoto portraits.
• Compact 920g construction with 80mm x 201mm dimensions offers good portability for a medium-format telephoto zoom when travelling or shooting on location.
• 67mm filter thread supports commonly available filters, making it easy to add UV, polarising or ND filters to suit different shooting conditions.
• Supplied PH-RBG67 lens hood helps reduce flare and protects the front element, maintaining contrast in bright or backlit scenes.