Photoclub Alpha

December 2, 2009 – DxO Labs is pleased to announce the immediate availability of DxO Optics Pro v5.3.6 for Mac bringing full compatibility with Apple’s latest operating system Mac OS 10.6 Snow Leopard, and adding RAW support for 15 new cameras:

Canon EOS 7D and PowerShot G11;
Nikon D300s and D3000;
Olympus E3 (Elite edition only), E-30, E-410, E-420, E-450, E-510, E-520 and E-620;
Sony A230, A330 and A380.
This new version for Mac also offers support for 255 new DxO Optics Modules, covering 46 cameras.

Availability and holiday season price

DxO Optics Pro v5.3.6 for Mac, both Standard and Elite editions, are immediately available from both DxO Labs’ e-store and selected resellers at an exceptional 30% discount until December 31, 2009:
Standard edition: £ 69 instead of £ 99 (or a savings of £ 30)
Elite edition: £ 139 instead of £ 199 (or a savings of £ 60)
DxO Optics Pro 6 for Mac is scheduled for release during the first quarter of 2010 and will be available as a free upgrade to customers who purchased version 5 after June 1, 2009.

www.dxo.com

My review of the Alpha 550 has caused controversy because of the blue sky noise. I might as well say that over the last week, I’ve used the 550 in a wide range of conditions – some very bad conditions included – and its failure to match ISO 100 finesse would not worry me at all. The performance at higher ISO settings is so much improved it’s worth putting up with the minimum of ISO 200, and a touch more noise than the best ISO 100 results from the Sony CCD sensors.

Even so, something was clearly happening during the period of sunnier weather used for my earlier A550 tests. I used Auto ISO initially, because I had not realised how readily the camera will select settings right up to 1600. Auto ISO has thrown up some surprises. Here’s something to consider:

Please note that although ‘process’ symbols are shown with these Adobe Bridge/ACR images, the defaults were restored and then each picture was set back to defaults. They are all shown relative to each other in density, the image preview built by ACR. There is no question of DRO or any other tonal setting interfering with the apparent exposure – DRO does not affect the .ARW file, ACR discards any DRO generated embedded preview in my setup prefs, and DRO was not being used anyway.

It has already been noted by other reviewers that the A550 has considerably more headroom without clipping, even compared to the A350 which was already a top-ranking camera for dynamic range. This is what I meant when I compared its default images to Canon with Highlight Tone Preservation switched on, or KM/Sony older models using the Hi200 setting. This can mean that the A550 is really ISO 100 at its lowest on-sensor gain setting, but the exposure system is programmed to underexpose by a stop and the post-processing (BIONZ) is set up to boost the gain.

Why would Sony do this? Perhaps they read the many posts referring to the Alpha 900 and 700 ISO settings. The on-sensor gain controls the main ISO steps, but a rather cleaner post-process gain adds the 1/3rd step intervals. Experienced Alpha 900 users set ISO 320 manually because the sensor is at its optimum at roughly ISO 160 (DxO tests bear this out). The standard ISO 200 setting can produce more noise than ISO 320 because two different digital stages are used to produce the gain.

In search of superior high ISOs, they may have realised that the early gain stage (on the chip assembly) is inferior to the later BIONZ processor, and you can indeed get better high ISO by underexposing a lower ISO setting, then processing it with clipped blacks. That’s a Nikon technique, which has served them well. It’s also a technique used by experienced DSLR owners.

Now consider the four shots above. They are all taken at ‘ISO 200′ but the camera was set to auto ISO. Other shots in the same set show ISO 250, 500 etc confirming the auto ISO was in operation. They are taken in the afternoon in Scotland, so it is fairly near to the end of the day for sunshine by 14:49hrs, around an hour away. But the two locations at 50 minutes apart, 14:00hrs and 14:49hrs, should not have the extreme variation in exposure shown here.

Just what is going on for an exposure of 1/400th at f/11 to look correct at ISO 200, with the dark sandstone buildings of Jedburgh at the end of October? 1/400th at f/11 is the ISO 200 exposure for full sunshine in midsummer (aka f/16 light). You hardly ever find f/16 light in Britain unless you are on the beach, surrounded by pale concrete, in a field of golden corn or out on a lake.

50 minutes later, exposures range from 1/60th at f/11 to 1/100th at f/11 – that is, more or less, from two to three stops more. In fact these exposures are in line with what I would expect, it’s the 1/400th at f/11 which is the odd one out. I have no evidence to suggest that my CZ 16-80mm has an aperture which fails to stop down consistently.

Now look at some sky samples:

Here is an in-camera JPEG version which shows less noise – the in-camera process is equal to using much stronger NR in raw conversion than I would normally choose for ISO 200:

Now for the same processed from raw – notice that despite the noise, it is slightly more detailed or sharper:

This is a reprocessed second version of the original noisy sky instance. Here, I have used Adobe Camera Raw 5.6r1 defaults, which include some basic sharpening and also 25 on the chroma NR scale. No exposure adjustment is made at all. This view, by the way, looks more or less due north and it is not a case of a brighter sky underexposed; also, the stone and the chimney pots look normally exposed.

This is the 1/100th at f/11 shot, processed exactly the same way. It’s interesting in that I expected to see much lower noise, but in fact it’s much the same. The sky density is similar as well. The view is slightly more towards the east. While my Alpha 380, 200, 100 and even 700 shots are capable of showing blue sky noise at ISO 100 and as much as this as 200 it’s not as obtrusive.

Finally, this is the 1/60th exposure – perhaps more what would be expected at ISO 100 in this light with f/11. Here, I have set -1 EV exposure reduction in Adobe Camera Raw to get much the same final sky tone density. The noise is lower.

Checking other images I’ve taken since, I am now suspicious about the Auto ISO function in the Alpha 550, and whether it reports the gain applied to each shot accurately. It’s hard to reconcile the same ISO 200 setting shown in EXIF with the range of exposures encountered, and the actual exposure of the raw file. Yet ISO 250 was also selected for this shot taken a few minutes before the chimney shot:

This is also included in the main report (click image to view full size on pBase). If I darken the sky as much as the other examples, I get noise similar to the 1/60th ISO 200 clip, or better.

Since making these tests, I’ve started using the Alpha 550 only on fixed ISO settings, with some misgivings as intermediate gain like ISO 250 or 320 might possibly be yielding better results. I just feel something is happening in the BIONZ stage, perhaps involving analysis of the Auto ISO images and compensation for deviations from the reported EXIF Auto ISO setting. This is just a hunch. Fixed settings seem to be equal to the worst case from Auto ISO. Here’s a textbook example, 1/125th at f/16 for a blue sky on November 3rd, facing due north, at 14:19hrs, ISO 200 fixed setting, ACR 5.6 defaults as above:

The answer seems to be to overexpose your manual ISO 200 shots by not simply one stop, but as much as two stops when shooting raw. At least if Adobe Camera Raw is used, recovery of normal tones (not burned out highlights) will fully restore the exposure from 1 or 2 stops over depending on the subject.

Here is an overexposed image, taken at 1/80th at f/10, ISO 200, in mid-day sunshine:

Below is what the sky looks like in a normally exposed image (1/250th at f/10), processed using Adobe Camera Raw defaults (including sharpening at 25/1/25/0 and NR at 0/25), looks like:

And here, finally, is what an adjusted ACR process from the overexposed image looks like with sharpening turned off, NR set to 25/50, exposure and brightness determined by the simple process of using Auto (which can be set as a default in ACR if you want to consistently make generous – over – exposures ‘to the right’):

This is much more how I expect to see a sky looking from the base ISO of a 2009 DSLR release, viewed at 100 per cent. From this stage, different types of sharpening can be applied to suit resized versions for different purposes.

Results with other raw converters, as more become available for the Alpha 550, may be finer in noise structure than ACR or may offer less scope for overexposing – ACR is well known for its ability to recover highlights. I do not intend to go much further into this with tests of converters, but I hope I have shown how the ‘true ISO’ of the A550 is difficult to pin down especially in Auto ISO mode, and how it is possible to benefit from the great high ISO performance of the camera (just use it!) and at the same time secure good low ISO results for travel and landscape shots where a clean blue sky is important.

It’s important to note that in-camera JPEGs will not necessarily show similar noise levels. If they do it’s not so easy to fix without using NR software. I prefer to shoot raw for many reasons.

So, why not be very happy with the Alpha 550 as a choice? Here are two pictures. You can view the full size Alpha image, and the Nikon D3S image resized to match 14 megapixels, by clicking on the smaller size here. Of course the Nikon image is better, though 1/250th at f/5.6 and ISO 400 is more of a step away from 1/250th at f/9 and ISO 200, and I’m not sure the light was SO different on the two occasions:

- DK

I don’t have an Alpha 500 or 550 here yet, even though Photoclubalpha has been second in the Google search results for ‘Sony Alpha 550′ for some time and remains so as I write (the New York Times is first). That’s not bad for a Wordpress blog website which does NOT employ the services of the dozen or so ’search engine optimisation’ experts who contact us each week! Hopefully we’ll have a review camera very soon, preferably the 550.

In the meantime, a few samples have been posted on various sites which show the raw conversion engine of the camera/s (not necessarily the JPEG compression stage, as always seems to be assumed) has been radically revised. Sony call this ‘enhanced BIONZ’ and I think there’s a clue to how it has been enhanced in the relationship of Sony Europe and DxO Labs, the French company which specialises in in-camera process analysis and development.

DxO Labs today has announced the availability of DxO Optics Pro v5.3, a new release which includes support for the Sony cRAW format missing from previous versions. They also say that new RAW conversion technology “turns the promises of very high ISO (up to 25,600) into reality”.

There’s a lot of controversy right now about whether or not the image structure of the Alpha 700 files at very high ISO – mainly 3200 and 6400 – is as clean as raw processed results from other comparable cameras like the Canon 40D (does not offer ISO 6400), the Olympus E-3 (does not offer ISO 6400) or the Nikon D300. At the heart of this is the way different raw processors handle file conversion, and most specifically, the current performance of Adobe Camera Raw 4.3.1.

The Sony DSLR A200 is now on sale, following the end of Alpha 100 production. Although it is without any doubt the Alpha 100 replacement mentioned by Sony executives in October 2007, when they first revealed that the 100 was no longer being made, it is not an exact equivalent and represents a mixture of upgraded performance and simplified specification. Because it has gone in two directions at the same time, the A200 poses a problem for A100 owners.

After reading Andrea Nivini’s article in Italian Tutti Fotografi, December 2007, which launches an attack on Adobe’s Camera Raw plug-in and its handling of many camera types – but specifically, the Sony Alpha 700 – I decided to check out whether the December 5th release, ACR 4.3.1, fixed the problems.

DxO OPTICS PRO 4.1 is the latest version of a clever raw file processor which includes lens lookup tables to auto-correct distortion, vignetting and chromatic aberration. It also lets you alter the look of Dynax or Alpha images so they match popular films – or other DSLRs by Canon and Nikon!

Our articles are written as ‘Posts’ and automatically added to Categories, Recent Posts and Archives. This manual index to articles will help you find the larger reviews, as distinct from short pieces on assorted subjects:

Main camera reviews

Sony Alpha 380 review

Which Sony Alpha? Choosing between the A700, A200, A300 and A350.

Sony Alpha 350 Live View tested

Sony Alpha 350 – a Creative Review

Sony Alpha 200 guided tour (full description with large photos and comments on operation)

Sony Alpha 700 operation and use review: the Interface

Sony Alpha 100 report from the launch of the camera

Do You Really Need an Alpha 900?

Alpha 900 as a High ISO Camera

Alpha 900, Canon 5D MkII, Nikon D3X studio shoot out test

Major overviews

70 Years of Minolta History – 113 cameras from 1928 to 1998

Lens Reviews

The 70-300mm SSM G sized up (first report)

Carl Zeiss 16-80mm zoom review

Tamron 18-250mm zoom review

Tamron 70-300mm f/4-5.6 Tele-Macro LD Di

Lensbaby 3G selective zonal focus tilt/swing lens

Sigma 70-200mm f/2.8 EX DG HSM Macro II

Sigma 400mm f/5.6 classic M-AF - rechipping for digital

Sigma 50mm f/1.4 HSM EX DG

Tamron 10-24mm f/3.5-4.5

Which Sony Alpha kit lens?

Software Reviews

DxO Optics Pro 4.1 review

Seven raw processors tested with Alpha 700

Apple Aperture 2.0

Capture One v4

Accessories and aftermarket

Haoda Fu split-image/microprism replacement focusing screen for Dynax 5D or Alpha 100

Flash choices for the digital SLRs (camera top bounce/direct)

Studio Light table review and technique

Sony GPS-CS1 device to pin your pictures on Googlemaps

E-Books from Gary Friedman are user guides, mines of information and all-round treasuries of inspiration for Alpha owners – see www.friedmanarchives.com for details and how to buy them either as a physical printed book, or a download. His e-Books include:

• Dynax 7D/5D
• Dimage A1/A2 book (equally applicable to the Dimage A200)
• Alpha 100
• Alpha 700
• Alpha 200/300/350
• Alpha 900

dPreview

dPreview is recognised as one of the most important camera test sites on the web. While some visitors complain of bias, we do not believe that is the case, and Phil Askey’s test report on the Alpha 100 while missing a few minor plus points was very fair. This report also showed that the Sony Alpha 100 has (and still has) the highest extinction resolution of all the 10.2 megapixel class DSLRs. dPreview has now covered the Alpha 350 and 200 as well as the 700, a different staff writer covering each camera.

Read Phil’s Alpha 100 review

Phil has also done a review of the Alpha 700

Alpha 200 review – Alpha 350 review

Alpha 900 review

Raw converters

Sony Alpha owners will find that Adobe Photoshop CS2/3 and Photoshop Elements 4.0/5.0/6.0 include a good .ARW raw file converter in the current version of Adobe Camera Raw 3.x/4.x (anything later than 3.4 will process Alpha 100 .ARW files, 4.3 or later is needed for .ARW2 files from the A700/200 and is much improved over the first compatible version, 4.2, so upgrade your installation if you are still using 4.2). Earlier versions will not handle Alpha files. 4.5 handles 350 files well.

You can also convert .ARW raw files from the Sony Alpha 100 into Adobe .DNG (Digital Negative) universal raw files, readable by earlier versions Adobe Photoshop 7, CS and Elements 3. Please note that downloading auto-updates for Photoshop does NOT automatically update the raw converter, and this must be done as a separate, manual download. There are two download options, both entirely free, for the DNG converter and the ACR 3.x/4.x plug-in (which requires CS2/3 Mac/PC; or PSE 3/4 for Mac, PSE 4/5 for Windows; and is not compatible with earlier versions):

Windows download page

Mac download page

Adobe Lightroom, a dedicated raw file conversion and ‘digital asset management’ utility, which is a complete stand alone product including A100 conversion, can be purchased from:

http://www.adobe.com/products/photoshoplightroom/

There’s a great Mac-only raw file developer for the A100, A700, A200 and previous Konica Minolta DSLRs – RAWDeveloper from Iridient. This is really fast, allows scaled exports, has superb noise reduction and is a highly professional workflow solution.

Another alternative is Silkypix Developer Studio, a Japanese developed raw file converter, which has something in common with Sony’s Image Converter SR, and will – again – handle both the new A700/A200 and A100 file formats and previous Minolta and Konica Minolta raw files, for those with mixed systems. This is available in both Windows and Mac versions.

Bibble, a popular commercial multi-format raw converter and browser utility, now supports the Alpha 100/700/200. We have had some problems with scaled-up output showing unwanted raster-like patterns, but for normal size files BibblePro offers NoiseNinja which is one of the best ways of dealing with the Alpha 100’s rather strong high-ISO noise levels.

DxOptics Pro also now supports some Konica Minolta/Sony DSLRs and includes automatic correction for a few Minolta/Sony lenses. This deals with chromatic aberration, fringes, curvature of lines and vignetting of brightness towards the corners of the field, and it is especially useful with digital format zooms. They do not appear to have fulfilled the promise of serious support, and are concentrating on the obvious cashcows of Canon and Nikon ownership percentages. The latest v5.2 update brings the Alpha 700, 200 and 350 into the fold with an odd set of lenses but omits the 300 entirely.

An excellent top-level raw .MRW/.ARW converter, if a little hard to master, is Capture One Pro made by Phase One, the Danish digital medium-format back manufacturer. You can download trial software, or upgrade the LE version provided promotionally to the full product, by visiting Phase One’s website. The latest versions are good at handling high ISO noise but Phase One is fairly slow to add new camera models.

Recently, a Mac-only converter came to light, RawPhotoProcessor. This is simple and deep. It reveals a lot about the image through reading the makernote and metadata comments hidden in each file. It is fast and small. It has no noise reduction beyond simply chroma blurring, and no sharpening option.

http://www.raw-photo-processor.com/RPP/Downloads.html

Another commercial program we really like – it has a very good interface – which works well with the 5D, 7D and A100 but awaits A700 addition is LightZone from Lightcrafts Inc. This is a feature-laden full image management system which can match Aperture or Lightroom on most levels and even replace Photoshop for some work.

http://www.lightcrafts.com/download/download.html

This program is not very well marketed internationally, yet. Of all the commercial offerings it has the most potential, I think, for cross-platform universal application. It is apparently JAVA-based.

A good PC-only raw converter, small enough to run on palmtop devices and Origami platform machines, is RawTherapee. This independently written experimental converter has won many converts amongst Alpha 700 users, as it offered support right from the start and overcame most of the smurrging issues present in high ISO detail:

http://www.rawtherapee.com

Let us know of any other raw converter links, and I will add them.

Support and resources

For legacy support and information on Konica Minolta photo-digital products, we currently recommend the website below, which has not disabled all its downloads of software, firmware, etc: http://ca.konicaminolta.com/support/americas/

For information on the Sony Alpha system and the new Sony Alpha 100 DSLR, the UK Sony site now has some really excellent resources in place. Use the High Bandwidth option if you possibly can, and expore both ‘Assignments’ and ‘Equipment’: http://www.sony.co.uk/nextlevel

The bimonthly magazine for freelance photographers, f2 Freelance+Digital, has a dedicated website where many PDF articles can be downloaded. We have included on this site many PDFs from our Photoworld magazine. f2 magazine moved to new publishers from the October/November 2006 edition, but our website remains operational. Registration is necessary but paid subscription is only required to access the archives of older articles – new editions are free for two months to all comers, subscribers can download from well over 100 previous articles: http://www.f2photo.co.uk/

You can view a selection of full size, 10.2 megapixel images taken with the new Sony Alpha 100 on David Kilpatrick’s pBase pages. At the last count there were over 70 examples and the Alpha images had clocked up over 100,000 views. There’s lots of technical information on the tests, examples, and comparison present on these pages. These include comments, captions and EXIF shooting data: http://www.pbase.com/davidkilpatrick

There is an independent Minolta M-AF forum and website, Dyxum, which offers many useful resources including lens tests and storage card speed comparisons. Unlike dPreview, Dyxum does not ban participants for being associated with specialist websites like Photoclubalpha, and has kindly promoted and helped us in the past: http://www.dyxum.com. Dyxum is probably the most active Alpha discussion site, with an excellent lens review and rating system allowing you look up almost any lens ever made to fit M-AF and find a user opinion along with full specs and original selling price. They also have a very good links page which lists just about every other Alpha resource around!

Yahoogroups include one dedicated entirely to Minolta which in practice is used by Sony Alpha owners as well – http://groups.yahoo.com/group/Minolta/. There is also a Yahoogroup called SonyAlpha, at least until Sony’s legal dept ask them to cease and desist: http://groups.yahoo.com/group/SonyAlpha/.

A busy forum is well established at Dynaxdigital – http://www.dynaxdigital.com/

Carl Garrard and T E Morrison have set up a site called Alphamountworld which offers forums, reviews and articles and will be reporting from major trade shows in the US. Carl is also going to post articles from his show visits or press invites to Photoworldalpha.

A useful group with a strong photography emphasis is UKExpert – forums and galleries and many further onwards links. It was a pleasure to meet Andy from UKExpert at the Sony Alpha 700 launch, and great to know that Sony value the presence of independent opinion-formers.

There is a photo sharing site (by far the most popular web activity for photographers!) at Shootalpha.com. This is, after all, what camera clubs and even august professional associations do – share their pictures and pass generally not unkind comments on them to each other, with the occasional bit of constructive crit. Do not expect to encounter the photo equivalent of Simon Cowell stalking the gallery pages, you will be welcomed as a beginner and find your level quickly. There is also an active forum.

Here’s an enthusiast from New Zealand – Rob provides many further links connected with the A900.

And here’s a man banned from the Photoclubalpha forums because of his outbursts, insults and general bad attitude – Don Northup, aka Sonolta. He’s an excellent Alpha photographer (not mention prolific).

Dealers and spares

At Icon Publications Ltd we now have just a selection of Minolta glass filters; MD/AF hard lens cases (many types); Dynax branded original camera straps; Minolta leather cases ideal for iPhones, iPods etc; and Vectis BPS-1 battery base grips for the Vectis S-1.

Former Minolta Club administrator Adrian Paul has his own specialist business selling spares, accessories and smaller hard-to-obtain products from the Minolta and Konica Minolta ranges, and will be offering Sony Alpha system products in future. The Photostore is a mail-order business only and Adrian offers a fast, excellent standard of service and knowledge: http://www.photostore-uk.com/

Lens rental is also available from the Photostore in the UK, but applies only to Photoworld magazine subscribers, and full details are printed in each magazine. There is a new Alpha lens rental service operating in the USA – http://www.alphalensrental.com/index.html.

In New Zealand, the Sony Service Centre for Alpha is http://www.phototronic.co.nz/ – they are also dealers, an ideal one-stop shop for purchases and repairs, run by a former Minolta UK Ltd service department staff member.

Pro dealers Calumet have the Alpha system now as a main line, after decades of sidelining the Minolta mount. This is very important and will put the Alpha in front of Britain’s working professionals: http://www.calumetphoto.co.uk/.

London Camera Exchange Colchester is now a Sony ACE dealer and has committed to supporting this website and our magazine. The branch manager will always try to offer the best deal to Photoclubalpha members! Email them on colchester@LCEgroup.co.uk or call 01206 573444.

To find out about the values of used cameras, visit the Monark camera price guide site – http://www.cameravalues.com/

Thank you for visiting the photoclubalpha.com site. If you would like to receive future information by email from Sony UK about the Alpha system, and news of future developments for the former Minolta Club of Great Britain, please email david@photoclubalpha.com using the heading ‘Add to Alpha mailing list’.

THE NEW Tamron 18-250mm has some importance to Alpha system users. It is almost certainly the optical basis for the forthcoming Sony SAL 18-250mm version, and as a APS-C 13.7X zoom with an equivalent 27-375mm (in full frame terms) range is uniquely suited to the SSS-enabled Dynax 5D, 7D and Sony Alpha 100