Ricoh has announced a new wide-angle prime for its Pentax 645D/645Z medium format digital bodies. This lens' name is a mouthful: HD PENTAX-D FA645 35mm F3.5 AL [IF]. The top-line specs are that it acts as a 27.5mm (in 35mm terms) on a digital 645 body, has a minimum focus distance of 0.3m, giving a maximum magnification ratio of 0.25x.

The lens has both high refractive index and hybrid aspherical elements, for optimizing peripheral brightness and compensate for chromatic and spherical aberrations, an HD coating to reduce flare and ghosting, and a protective SP coating to keep grime off of the front element. It has a 9-blade rounded aperture, internal focusing and is threaded for 82mm filters.

The HD Pentax-D FA645 35mm F3.5 AL will ship in December for £1549.99.

Press release:

An interchangeable wide-angle lens for use with medium-format DSLR cameras, for the delivery of sharp, high-resolution images

RICOH IMAGING EUROPE SAS is pleased to announce a new addition to the PENTAX 645 medium-format DSLR camera system, with the launch of the HD PENTAX-D FA645 35mm F3.5AL[IF] wide-angle lens.

This newly designed lens is based on the smc PENTAX-FA645 35mm F3.5AL[IF], renowned for producing crisp images. Thanks to the incorporation of newly designed high-grade aspherical optical elements, this lens has been optimised for digital imaging by minimising a number of aberrations. Treated with the PENTAX-original HD Coating, the HD PENTAX-D FA645 35mm F3.5AL[IF] delivers high-contrast, high-resolution images even in demanding lighting situations, making it ideal for scenic photography.

Main Features:

1. Optical design supporting super-high-resolution images captured with medium-format DSLR cameras
Combining a newly designed, high-grade glass-moulded aspherical element with a high refractive index low dispersion glass element and a hybrid aspherical element in its optics, this lens effectively compensates for chromatic and spherical aberrations. It also assures a sufficient peripheral brightness level, while enhancing image resolution and crisp image description at edges of the image field. The lens coating and reflective material used for the interior of the lens barrel are optimised for the distinctive characteristics of digital imaging. This allows it to draw out the optimum performance of PENTAX medium-format DSLR cameras, while minimising flare and ghost images.

2. Wide-angle perspective - perfect for scenic photography
This lens provides a focal length of 27.5mm (in the 35mm format; when mounted on a 645Z or 645D camera body) to capture wide-angle landscape and architectural images. With a minimum focusing distance of 0.3 metres and a maximum magnification of 0.25 times, it can also be used for close-up photography, allowing the photographer to capture subjects, like flowers, while retaining the scenery in the background to emphasise the sense of depth. Its inner-focus mechanism keeps its total length unchanged during focusing, and allows the user to maintain the ideal balance during handheld shooting.

3. HD Coating for high-resolution images
This lens is treated with the PENTAX-original, high-grade HD Coating.* Compared with conventional multi-layer coatings, this innovative coating assures higher light transmittance and lower reflection to deliver bright, high-contrast images free of flare and ghost images, even in demanding lighting situations
* HD stands for High Definition.

4. Rounded diaphragm for a beautiful bokeh effect
This lens features a nine-blade, rounded diaphragm to produce a smooth, beautiful bokeh (defocus) effect, while minimising the streaking effect of point light sources.

5. Other features

  • Image circle covering the entire image size of 645-series film-format SLR cameras
  • SP (Super Protect) Coating applied to the front surface of the lens to effectively repel water and grease
  • Attachment of various filters, such as a C-PL (circular polarising) filter, to the front end of the lens
  • PL filter window for easy control of a polarising filter without requiring the removal of the lens hood

Note: Designs and specifications are subject to change without notice

RRP: £1,549.99
Available: Mid December 2015

HD Pentax-D FA645 35mm F3.5 AL [IF] specifications

Principal specifications
Lens typePrime lens
Max Format sizeMedium Format (645)
Focal length35 mm
Image stabilizationNo
Lens mountPentax 645AF2
Maximum apertureF3.5
Minimum apertureF32
Aperture ringYes
Number of diaphragm blades9
Aperture notesRounded aperture
Special elements / coatingsHRI and hybrid aspherical elements, HD and SP coatings
Minimum focus0.30 m (11.81)
Maximum magnification0.25×
Full time manualYes
Focus methodInternal
Distance scaleYes
DoF scaleNo
Weight570 g (1.26 lb)
Diameter88 mm (3.46)
Length90 mm (3.54)
Filter thread82 mm
Hood suppliedYes
Hood product codePH-RBE82
Tripod collarNo