Photoclub Alpha

ACCORDING to specifications revealed on a German site, the new Sony Alpha 500 will have a 12.3 megapixel CMOS sensor capable of providing Live View to the rear 3 inch medium resolution screen – with Manual Focusing at 14X magnification. The in-prism based Quick AF Live View is retained, giving a choice between two entirely different systems of Live View, Sony’s innovative and easy solution scanning the focus screen, and a critically accurate alternative for tripod work. The camera may sell for just €50 more than the Alpha 380 – or break the £500 body only barrier in the UK right from the start.

Tamron’s 18-250mm lens – later adopted by Sony – was so good that it really takes some effort to beat it. Sigma has put that effort in, but the cost is a very much larger and heavier lens. If all you got was some better performance, it might not be all that exciting. But you get potentially superior anti-shake through its built-in OS, and faster focusing with HSM, the Sigma equivalent of SSM.

A long-demanded 1.15X eyepiece magnifier – compatible with all APS-C format Sony Alpha DSLRs – is just one of a rollout of new minor accessories for the system. The Magnifying Eyepiece FDA-ME1AM is designed to fit the A700, A380, A330, A230, A350, A300 and A200 and should also be fully compatible with A100, Konica Minolta 7D and 5D.

SIGMA redesigned their 70-200mm not long ago to change the EX version to DG, introducing new coatings which greatly improved microcontrast and eliminated digital camera sensor reflections. In 2008, this was further upgraded to the Macro II model with HSM sonic motor focusing, a new optical design capable of focusing down to 1 metre distance. In 2009 this became available, along with matched HSM-compatible 2X and 1.4X converters, for the Sony Alpha mount.

PENTAX UK is pleased to announce the launch of the PENTAX K-7 lens-interchangeable digital SLR camera. The K-7 combines a variety of advanced functions and user-friendly features to ensure outstanding reliability and capability within a compact, lightweight body (says the press release from Pentax in the UK).

The K-7 joins the current PENTAX K digital SLR camera series as a high-end model in the range. True to its series concept, it has been designed to deliver outstanding image quality combined with ease of use, to benefit photo enthusiasts of all levels, including advanced amateurs. The K-7 also includes revised and upgraded features including viewfinder, shutter unit, continuous-shooting capacity, and exposure and autofocus systems.

Protected by a durable, high-quality metallic body, the K-7 is extremely compact and functional — as with all other K-series models — delivering enhanced portability and manoeuverability. The model includes several new user-friendly features, including video recording, high dynamic range (HDR), and automatic horizon correction. All of these features serve to deliver a highly effective photographic tool, perfect for all discerning digital SLR photographers.

Tamron Co., Ltd (Mr. Morio Ono, President), a comprehensive manufacturer of optical products with its head office in Saitama City, has announced the development of the SP AF60mm F/2.0 Di II LD (IF) MACRO 1:1 (Model G005), a life-size macro lens designed exclusively for digital SLR cameras with APS-C size image sensors* that offers a fast maximum aperture of F/2.0. (Text here is directly from their press announcement).

There is a white paper by Sony Semiconductor on the imaging processing which I think is in the HX1, http://www.sony.net/Products/SC-HP/cx_news/vol55/pdf/featuring55.pdf. I assume it is the IMX-032 CMOS sensor (http://www.sony.net/Products/SC-HP/cx_news/vol55/np_imx032cqr.html) mated to a CXD4109AGG image processing chip. There seem to be some interesting techniques employed, multi-plane synthesis to combine several frames for low light and HDR capture.

With the IMX-032, it is interesting to note that the on-board programmable gain amplifier has a gain value of up to 18dB or a factor of 8, so if base ISO is 80, then maximum “analogue” ISO is 640. If we compare the IMX-032 versus Sony’s first column ADC CMOS chip (IMX-017), the IMX-32 has an 11.8% better photo-electron efficiency per unit area (2300e per 1.75 micron square pixel compared to 4500e per 2.5 micron square pixel). Might be a sign that Sony is improving the process and design used to make their CMOS chips.

The backside illuminated chip is called the IMX-061, http://www.chipworks.com/uploadedFiles/Aliased_Pages/CMOS_ImageSensors_Spotlight/Chipworks%20-%20Sony%20IMX061%20EXR-0902-813.pdf
6MP and 1.75 micron pixels in ClearVID (45 degree) layout with a 1:6:1 RGB Bayer filter array, sacrificing colour resolution for spatial resolution.

The Nikon D90 chip is called the IMX-038 (not the IMX-021 as for the A700), so this suggests it has significant revisions compared to the IMX-021 (possibly linked to LiveView and HD Video?).

– Dr Daniel K. L. Oi

Adobe has released Photoshop Lightroom 2.3 and Camera Raw 5.3, available immediately for download at www.adobe.com/downloads/updates/. The Lightroom 2.3 and Camera Raw 5.3 updates, originally posted as release candidates for community testing on Jan. 23, provide raw file support for the newly-released Nikon D3X and Olympus E-30 cameras.

The Lightroom 2.3 update also provides support for eight additional languages including Dutch, Italian, Portuguese (Brazilian), Spanish, Swedish, Korean, Chinese (simplified) and Chinese (traditional). Additionally, it addresses several issues including a solution to a memory leak that affected some customers of the Lightroom 2.2 release.

Lightroom has received tremendous support from the photography community, and companies have released plug-ins that further extend Lightroom 2’s capabilities. Today, Nik software announced that its Viveza plug-in for colour refinement and light control is now compatible with Lightroom 2, and Photomatix recently updated its Lightroom HDR plug-in to work smoothly with Lightroom 2. To discover more plug-ins compatible with Lightroom 2 visit the Lightroom Exchange home page: http://www.adobe.com.

Pricing and Availability

The Adobe Photoshop Lightroom 2.3 update is available as a free download for existing Lightroom 2 customers and the Photoshop Camera Raw 5.3 plug-in is available as a free download for existing customers of Photoshop CS4, Photoshop Elements 7, Premiere Elements 7 and Photoshop Elements 6 for Mac. Both updates can be downloaded at www.adobe.com/downloads/updates/.

Tamron’s new ultra wide angle zoom for APS-C/DX is getting a bit of a blasting from reviewers. Now, when I see this happen, I get curious. Lens testing is often badly designed for such zooms, involving test chart targets at distances which are extremely close and result in very bad figures caused mainly by a strong curvature of field (dished, ‘cap’ shape relative to the camera) when gets worse in effect the closer you focus.

Stock library Getty Images has added the Sony Alpha 900 to its rather restricted list of approved cameras – a very recent move, as it happened between the writing/research for my article appearing in the British Journal of Photography on February 18th, and publication. See: http://www.bjp-online.com/public/showPage.html?page=840375