Ricoh Imaging has announced an updated set of Pentax DA Limited primes, with improved lens coatings and circular aperture diaphragms. Based on the existing 15mm F4, 21mm F3.2, 35mm F2.8 Macro, 40mm F2.8 and 70mm F2.4 designs, the 'HD' versions gain Pentax's multi-layer HD (High Definition) coating, promising reduced flare and ghosting, and include diaphragms that are completely rounded at large aperture settings to give attractive background blur. Other specs, including physical dimensions, optical formulae, minimum focus distance and maximum magnification remain largely unchanged. The lenses will all available in September 2013, in a choice of silver or black. 

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US and UK suggested retail prices for the HD DA Limited lenses are as follows:

HD PENTAX DA 15mm F4 ED AL Limited  $699.95 £589.99
HD PENTAX DA 21mm F3.2 AL Limited $699.95 £589.99
HD PENTAX DA 35mm f/2.8 Macro Limited $749.95 £639.99
HD PENTAX DA 40mm F2.8 Limited $549.95 £439.99
HD PENTAX DA 70mm F2.4 Limited  $749.95 £639.99

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Press Release:

Ricoh Imaging Americas Corporation Introduces Five HD PENTAX DA Limited Lenses

New Lenses feature enhanced performance with high-grade HD coating and new rounded diaphragms for stunning bokeh effects

DENVER, CO, August 27, 2013 – Ricoh Imaging Americas Corporation (Ricoh Imaging) is pleased to announce the introduction of five new HD PENTAX DA Limited lenses. The acclaimed HD PENTAX DA Limited series of prime lenses, specifically designed for the PENTAX  K-mount DSLR cameras includes the HD PENTAX DA 15mm F4 ED AL Limited, HD PENTAX DA 21mm F3.2 AL Limited, HD PENTAX DA 35mm F2.8 Macro Limited, HD PENTAX DA 40mm F2.8 Limited and HD PENTAX DA 70mm F2.4 Limited, elevating optical design and performance.

Touting highly-enhanced optical performance the HD PENTAX DA Limited lenses feature treatments of both SP (Super Protect) coating and the PENTAX-original high-grade multi-layer HD (High Definition) coating, which assures much higher light transmittance than conventional multi-layer coatings delivering sharp, clear images with significantly reduced flare and ghosting, even under demanding, backlit conditions. All five lens models have also been upgraded with completely rounded aperture diaphragms at wide aperture settings for optimal optics performance and gorgeous bokeh effects.

“Ricoh Imaging continues to innovate and improve all aspects of photography,” said Jim Malcolm, Executive Vice President, Ricoh Imaging. “With an industry-leading 24 APS-C optimized lenses our family of K-mount DSLRs and lenses provides consumers with a system that has been fine-tuned and meticulously architected for optimal image output. And, with enhancements like HD coating, we are continuously helping consumers achieve more technically sound images.”

Inheriting the distinctive visual description and premium appearance of the lauded PENTAX Limited Lens series, the refreshed line of HD PENTAX DA Limited lenses features a meticulous finish in every detail, from the outstanding image rendition to the high-quality, hand-machined aluminum body, the refreshed lineup provides the utmost durability and elegant design.

Pricing and Availability

The HD PENTAX DA Limited Lens series will be available for purchase in a choice of black or silver at and retail outlets nationwide in September 2013 with the following suggested retail prices:

  • HD PENTAX DA 40mm F2.8 Limited- $549.95
  • HD PENTAX DA 15mm F4 ED AL Limited- $699.95
  • HD PENTAX DA 21mm F3.2 AL Limited- $699.95
  • HD PENTAX DA 35mm f/2.8 Macro Limited- $749.95
  • HD PENTAX DA 70mm F2.4 Limited- $749.95

Major Features (common to all five models):

1. High-grade HD coating for exceptional image rendition

HD PENTAX DA Limited lenses are treated with HD coating*, a high-grade multi-layer lens coating that assures higher light transmittance and lower reflectance than conventional multi-layer coatings. As the result, HD PENTAX DA Limited lenses produce sharp, clear images free of flare and ghost images, even under such adverse lighting conditions as backlight.
*HD stands for High Definition, and signifies the lens’s capacity to reproduce images that excel in transparency, definition, resolution and rendition.

2. Round-shaped diaphragm for beautiful out-of-focus rendition

All lenses feature a completely round-shaped diaphragm to optimize the performance of their distinctive optics. This diaphragm produces a natural, beautiful bokeh (out-of-focus) effect, while minimizing the streaking effect of point light sources.

3. Acclaimed Limited Lens-series qualities for distinctive visual description and a premium appearance

While inheriting the design concept of the Limited Lens series, these lenses were designed by combining a series of mechanical and numerical evaluations with human assessment of test-shooting samples to assure supreme image reproduction. Their optical design has been optimized for digital photography to deliver sharp, clear images with outstanding contrast, even at the maximum aperture. In addition, their lens barrel, hood and cap are all made of a high-grade aluminum material, hand-machined for perfect proportions and beautiful texture.

4. Enhanced exterior design signifying HD series

While inheriting traditional design features of DA PENTAX Limited Lenses the new HD PENTAX DA Limited lens series features a red anodized ring on the front of the focus ring to signify the presence of new HD PENTAX lens coating and enhance its exclusive appearance.

5. Other features

  • SP (Super Protect) coating (already featured in four other lenses) has been applied to the HD PENTAX-DA 40mm F2.8 Limited to keep the front surface free of dust and stains.
  • All the lenses come in a silver version in addition to the black version.

Design and Specifications are subject to change without notice.

Pentax HD DA Limited lenses specifications

 HD Pentax DA 15mm F4 ED AL LimitedHD Pentax DA 21mm F3.2 AL LimitedHD Pentax DA 35mm F2.8 Macro LimitedHD Pentax DA 40mm F2.8 LimitedHD Pentax DA 70mm F2.4 AL Limited
Principal specifications
Lens typePrime lens
Max Format sizeAPS-C / DX
Focal length15 mm21 mm35 mm40 mm70 mm
Image stabilizationNo
Lens mountPentax KAF
Maximum apertureF4F3.2F2.8F2.4
Minimum apertureF22
Aperture ringNo
Number of diaphragm blades979
Aperture notesRounded aperture diaphragm
Special elements / coatings1 Hybrid aspherical element, 1 ED glass element, High-grade multi-layer HD (High Definition) CoatingHigh-grade multi-layer HD (High Definition) Coating
Minimum focus0.18 m (7.09)0.20 m (7.87)0.14 m (5.47)0.40 m (15.75)0.70 m (27.56)
Maximum magnification0.15×0.17×1×0.13×0.12×
Motor typeScrew drive from camera
Full time manualYes
Focus methodUnitExtending front
Distance scaleYes
DoF scaleYesNoYes
Weight189 g (0.42 lb)134 g (0.30 lb)214 g (0.47 lb)80 g (0.18 lb)147 g (0.32 lb)
Diameter63 mm (2.48)
Length40 mm (1.56)25 mm (0.98)47 mm (1.83)15 mm (0.59)26 mm (1.02)
ColourBlack, Silver
Filter thread49 mm
Hood suppliedYes
Hood product codebuilt-in hoodMH-RBB43built-in hoodMH-RE49MH-RF49
Tripod collarNo

Additional images

15mm F4 in black 15mm F4 in silver, hood extended
21mm F3.2 in black 21mm F3.2 in silver, with hood
35mm F2.8 Macro in black 35mm F2.8 in silver, hood extended
40mm F2.8 pancake in black 40mm F2.8 in silver with screw-in hood
70mm F2.4 in black 70mm F2.4 in silver with screw-in hood