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pentax related articles from Digital Photography Review

Last Build Date: Wed, 25 Apr 2018 13:00:00 Z

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Here's how to create a super resolution photo with any camera

Wed, 25 Jan 2017 22:00:00 Z

This is a super resolution image, creating by combining four photos in Photoshop. We recently tested out the Pentax K-1 II's new hand-held Pixel Shift mode which combines four images to create a 'super resolution' file in-camera with better detail, dynamic range and lower noise. Sadly, it also results in some unwanted processing artifacts. But you can also create a super resolution photo without using Dynamic Pixel Shift by shooting a series of handheld images and combining them in Photoshop. Super resolution works essentially by sampling a scene multiple times with slight shifts in framing, which allows details to be localized with sub-pixel precision (since shifts are unlikely to be perfect multiples of one pixel). The result is a file with improved resolution, less noise, more dynamic range but no artifacts. The best part is you can do this with the camera of your choosing. For the sake of this example, we did it with the Pentax K-1 II. Ricoh has announced the Pentax KP, a more compact, modernized version (but not a replacement, after late confirmation from Ricoh) of the K-3 II which features a new 'high sensitivity' 24MP sensor and improved in-body image stabilization system. The new CMOS sensor brings with it a top ISO of 819,200 and an electronic shutter that tops out at 1/24000 sec (the mechanical shutter goes to 1/6000 sec). The KP uses the new 5-axis 'Shake Reduction II' IBIS system, first seen on the K-1 full-framer, which offers up to 5 stops of stabilization according to Ricoh. As with other Pentax models, the KP supports Pixel Shift Resolution as well as AA Filter Simulation. The KP uses the same SAFOX 11 autofocus system as the K-3 II, meaning that it has 27 points, 25 of which are cross-type. The KP's body is relatively compact, sealed against dust and moisture, and functional down to +14F/-10C. It has a pentaprism viewfinder with 'nearly' 100% coverage and a 0.63x equivalent magnification, as well as a tilting 3" touchscreen display. A nice extra is the ability to change the camera's grip, with three sizes to choose from. Typical of Pentax DSLRs, the KP is heavily customizable and features both Sensitivity and Shutter & Aperture Priority modes, a star tracking feature and built-in wireless flash control. The KP has added new Motion and Depth-of-Field options to the already large selection of bracketing modes it's inherited from its predecessors. It can capture Full HD at 60i, 50i, 30p, 25p and 24p. The KP can shoot continuously at up to 7 fps. It also has built-in Wi-Fi. Something the KP doesn't have is an HDMI port, instead using something called SlimPort, which can send HD video over a microUSB port. If you want HDMI, you're going to have to drop $25 on a dongle. The KP's battery life is rated at 390 shots/charge – which is on the low end for a DSLR – though an optional battery grip can hold an additional D-LI109 battery or the significantly more powerful D-LI90. The KP will be available in your choice of silver or black in late February for $1099/£1099 body-only. Ricoh Unveils Ultra-Compact PENTAX KP, a Weatherproof DSLR That Provides Outdoor Photographers with New Standard for Quality, Customization and Ease of Use Heir to K-3 legacy, Slim-Body Camera Incorporates New Features and Controls Optimized to Deliver Outstanding Images, Even in the Most Challenging Conditions First PENTAX APS-C Camera to offer Shake Reduction II WEST CALDWELL, NJ, January 25, 2017—Ricoh Imaging Americas Corporation today announced the PENTAX KP, an ultra-compact and highly portable DSLR with features and controls that facilitate capturing outstanding images, even in the most demanding conditions. The PENTAX KP packs many of the advanced capabilities of the award-winning PENTAX K-3 series into a modern, slim-body design that lends itself to applications from casual snapshots to serious outdoor photography while mountain climbing or trekking. The PENTAX KP also adds a new generation of innovations including a new, highly sensitive APS-C CMO[...]

Firmware update adds support for K-AF4 lenses to Pentax K-3 and K-50

Fri, 02 Dec 2016 15:00:00 Z


Ricoh has released firmware updates for its K-3 and K-50 DSLRs which add support for the company's K-AF4 lenses. K-AF4 lenses electromagnetically control aperture rather than using a mechanical linkage to the camera body. At time of publication, only the 55-300mm F4.5-6.3 ED PLM WR RE uses this system.

The firmware also improves overall camera stability.

Shaking up the market: Pentax K-70 Review

Tue, 08 Nov 2016 16:01:00 Z

The Pentax K-70 is a mid-level DSLR that takes the basic architecture of their existing K-S2 and adds a new 24MP AA-filterless CMOS sensor with on-sensor PDAF, and a slew of other improvements. The sensor is cradled by Pentax's famous 'Shake Reduction' in-body image stabilization system, and is protected from the elements thanks to weather-sealing and dustproofing. Clever use of the 'SR' unit enables the Pentax to perform a few tricks, such as the AA-filter simulator that reduces moiré and Pixel Shift Resolution that cancels out the Bayer color filter array by shifting the sensor one pixel in each direction, resulting in improved color detail and less noise. There's also an improved image processor that enables the K-70 to shoot 14 bit Raw at 6 frames per second, which works in tandem with an 11-point autofocus system. The central nine points of the AF system are cross-type, and are sensitive down to -3EV. Just this handful of headline features should make the K-70, at its starting price of $649.95 for the body, good value for money. Its competition, the Nikon D5500 and the Canon EOS Rebel T6i, don't offer up nearly as many features for the price. Let's take a closer look:   Pentax K-70 Canon Rebel T6i Nikon D5500 Launch price (body only) $649.95 $749.95 $899.95 Launch price (with long zoom kit lens) $899.95(18-135mm F3.5-5.6 WR) $1,099.95(18-135mm F3.5-5.6 STM) $1,199.95(18-140mm F3.5-5.6 VR) Control Dials 2 1 1 ISO range Auto, 100-102400   Auto, 100-12800 (expandable to 25600)   Auto, 100 - 25600   Image Stabilization Sensor-shift No No Focus Points 11 (9 cross-type) 19 (all cross-type) 39 (9 cross-type) Articulated LCD   Fully articulated Fully articulated Fully articulated Touchscreen No Yes Yes Wi-Fi Yes Yes Yes Battery Life (CIPA) 410 440 820 Live View Hybrid AF Yes No No AF Fine-tune Yes No No Weight 688 g (24.3 oz)   555 g (19.6 oz) 420 g (14.8 oz)   Viewfinder type   Pentaprism Pentamirror Pentamirror Viewfinder magnification 0.95x(0.63x in FF terms) 0.82x(0.51x in FF terms) 0.82x(0.55x in FF terms) Viewfinder coverage 100% 95% 95% As we can see, the Pentax represents a serious value for money. It offers complete (twin-dial) DSLR controls in a segment where most make do with just one. It has the largest viewfinder here and is the only one to offer full coverage of the scene. Plus, it is the only to offer in-body stabilization and on-sensor phase detection autofocus. As a consequence of the big, prism-type viewfinder and internal stabilization, it also ends up being the heaviest camera and comes with with the shortest battery life. On the face of it, the autofocus system appears behind the other two in terms of number of points, with the Nikon leading the way. When cross-type points are taken in to consideration, the Canon takes the lead with its 19 cross type points, while the Pentax and the Nikon both have only 9 cross-type points. On the other hand, the Pentax is the only one to offer the increasingly necessary (with DSLRs) AF fine adjustment. More on that later. For those that would rather not mess with adjusting autofocus, there are plenty of mirrorless options for the price of the Pentax. The quick Sony a6000 comes to mind, as does the similarly well equipped Olympus E-M10 II (IBIS and twin dials). If weight is an issue, the mirrorless options as a whole will offer a big decrease in weight and size, and in some cases a great increase in overall operation speed. For those wanting something more traditional and chunkier, though, the Pentax seems promising. What the mirrorless options, and even the DSLR options, won't be is a near indestructible, weatherproof camera. So, is the Pentax K-70 as good as its features promise?[...]

Pentax 55-300mm F4.5-6.3 ED PLM WR RE real world sample gallery

Mon, 17 Oct 2016 09:00:00 Z


The Pentax 55-300mm F4.5-6.3 ED PLM WR RE is a new variable aperture ultra telephoto zoom that is the first Pentax lens to use their new 'Pulse Autofocus Motor'. Although it is a bit darker than the old 55-300, autofocus is much faster and virtually silent. Take a look at our samples to see how sharp this handy new zoom is.