Pentax has today unveiled a ‘weather-resistant’ 100mm f/2.8 macro lens designed for use on film and digital SLRs.

The 100mm Pentax-D FA Macro f/2.8 WR is designed to deliver the 35mm viewing angle equivalent of a 153mm lens when used on a DSLR with an APS-C size imaging sensor.

The lens features a Super Protect coating designed to repel dust, water and grease, and minimise fingerprints and ‘cosmetic spots’.

This is the first Pentax macro lens to house a ‘completely rounded diaphragm blade’. The firm claims: ‘This creates a natural beautiful bokeh, while minimising the streaking effect of point light sources.’

Features include eight diaphragm blades and a minimum focusing distance of 0.303m.

It is due out in ‘December/January’, priced £679.99.