PENTAX DA645 28-45mm – New medium format zoom, stabilized and All Weather

Last updated Dec 1, 2018 1,324

Pentax today announced the first of 3 optics will shortly complete the offer (already extensive) optics for a digital SLR medium format Pentax. This is the wide-angle zoom PENTAX DA645 28-45mm F4.5ED AW SR (22-35,5mm equivalent in the 35mm format), a target of great interest fixing various primates, by standing to become a cornerstone of the brand.

First, it is a lens designed specifically for digital imaging (in particular, the sensor of the new Pentax 645Z, presented on 27 June). Consists of 17 elements in 12 groups, including two aspherical elements and two ED (Extra-low Dispersion), then this is the widest wide-angle zoom Pentax house (until yesterday, we stopped at 33-55mm).

Secondly, this is the first 645 to be equipped with optical image stabilization. According to the manufacturer, the stabilizer Pentax SR provides an advantage of 3.5 stop in handheld shooting compared to non-stabilized optics.

In addition, it is a model AW (All Weather), that is dust-proof and moisture thanks to 11 special seals, which prevent the infiltration of harmful elements – the ideal companion for the 645Z.

Pentax is not new to this kind of performance, it can be said that he did tropicalization the distinctive element of its range of 35mm SLR. Finding this same feature on a medium body size is a different thing …

25mm F4 lens weather and dust sealed.
Inline filter tray for 40.5mm filter (lens curvature prevents front mounted filters.).
Pentax quick shift focus system disengages AF motor for instant auto to manual focus switching.
Focal length equivalent to 19.5mm (in 35mm format) when used with Pentax 645d body (95 degree angle of view).
Rounded aperture blades for beautiful bokeh at open apertures.

Other salient features of the new lens are antireflection coating Coating and HD Aero Bright Coating, surface treatment SP (Super Protect) front lens to repel water and dirt, and classic rounded diaphragm Quick-Shift Focus System for instant switching to focus Once completely manual auto focus. The price of the new zoom stood at just under $ 5,000.