Photoclub Alpha

Continuing to make profiles when time permits, here is a reasonably detailed profile for the Sony DT 16-80mm f/3.5-4.5 ZA Carl Zeiss zoom (2007) created using the Sony Alpha 550 14.2 megapixel camera using Manual Focus Check Live View at 14X to set the lens focus and ensure the chart is positioned to use 100% of the frame.

http://www.photoclubalpha.com/DSLR-A550 (DT 16-80mm F3.5-4.5 ZA) – RAW.lcp

Right click to download this 56Kb file which should be placed in the Lens Profiles/1.0/Sony folder of the directory on your computer which holds Adobe Lens Profiles.

This profile has been created at full aperture and f/8-f/11 depending on focal length, at 16mm, 24mm, 35mm, 50mm and 80mm focal lengths and involved 90 raw captures.

It is possible in ACR/Lightroom to use profiles which are not created on your own camera type. This profile can be applied to any APS-C Sony or Minolta camera using the 16-80mm lens; because the A550 is currently the highest resolution body, the CA data gathered is more accurate than would be possible using a lower resolution body but may need a saved adjustment in defaults. Individual lenses differ slightly and may also need adjustments.

I have checked the operation of the profile on files from A100, A700, A200, A380, A350 and A550 and it’s very effective in removing CA. Illumination is much improved at 80mm (notably). You may prefer to turn the geometric correction down to zero (off) when the angle of view matters more than perfect straight lines – and also, where people are in the shot near the edges at 16mm. The distortion of the lens is optimised to lessen ‘stretched faces’ at the ends and corners of the shot, applying the profile removes this slight barrel distortion and does not improve groups. It’s most useful for horizons, rooms, seascapes, and subjects where a good straight rendering is critical.

It has been suggest I should add a donation button for these profiles. By all means see our subscription page, there’s a downloadable PDF of the latest Photoworld magazine for $3. I could easily have zipped profiles and sold them in the same manner, but that is not why photoclubalpha is here; Adobe provide the software to do this free (OK, I know what the rest of their stuff cost me…) and profiles should be made public domain by creators.

- David Kilpatrick

The Alpha System celebrates its Silver Jubilee or 25th Anniversary this month – though left uncelebrated by the inheritors of the Minolta AF legacy, Sony. They have no reason to draw fresh attention to the age of the system, as in four years they have taken it the same sort of distance that Minolta took the world’s first AF system in the late 1980s.

It’s not only Alpha’s 25th birthday. This is also the 25th birthday of modern AF SLR systems – all of them!

This is a multi-page article. See the links at the bottom of the page to Continue Reading after each page.

For Photoclubalpha and the historic Minolta Club of Great Britain, the anniversary does matter. A good many of you out there have been members since the launch of the system, often using the earlier SR and X manual focus systems before that. We still have a 1985 Minolta 7000AF and it’s still working just as it did when new.

25 years before the first Minolta SLRs appeared – a folding Minolta Six of 1935

I don’t mind showing my age to make a comparison. I was 11 in 1963 when I took my first pictures with an SLR camera. My father had bought himself a Pentax S3 – and the camera it replaced was 25 years old, a pre-war Zeiss Ikon Kolibri collapsible 16-on-127 model.

When the Kolibri was made, 127 was the ‘vest pocket’ format of choice. 35mm was on the rise, but 35mm SLRs had not yet arrived. They were as much a thing of the future as digital SLRs were when the Minolta 7000AF was launched.

But within that 25 years, there was hardly a single camera system made with interchangeable lenses that did not become obsolete. Only the ‘frozen assets’ of the cold war kept some systems, like the Exakta bayonet and the Praktina, alive. New brands were launched, from the British Wrayflex and Periflex to the Italian Rectaflex and many German oddities. It was not unusual for an entire system to be come and gone within a few years.

Even in the following quarter-century, the high years of the Japanese 35mm SLR, the succession of lens mount changes was bewildering. Independent lens makers like Tamron and Sigma were forced to make systems using interchangeable mounts not just because the public wanted it. A dozen or more mounts were made for every lens and in the 42mm screw thread fit alone there were endless variants – Praktica LLC (Pentacon Electric), Olympus FTL, Pentax ES and more.

It was more or less a 25-year cycle – the SR system was announced in 1958, and really got underway by 1960. It was to be another quarter century before the AF system arrived. We are now a further 25 years on – can we expect a totally new camera system, once again, in 2010?

Minolta’s SR bayonet mount, introduced in 1958/9, actually remained basically unchanged all the way through to 2005 when the last manual focus model, the X-370S, was available. It survives even now as a mount popular in China where the Seagull range from Shanghai Optical includes Minolta fit models. That mount only ever had one major revision, to add a linkage for open aperture TTL metering. The introduction of programmed exposure and shutter priority was cleverly enabled by using the existing design of lens mechanism and improving its accuracy, while adding a simple reference lug to the ƒ-stop setting ring.

Nikon’s 1959 F-mount proved similarly easy to improve without any basic modification. Both these bayonet mounts celebrated half a century of production in 2008/9 – another landmark, which Nikon was able to celebrate but Minolta of course could not.

The Autumn 2009 (No 4 2009) issue of Photoworld mails out to subscribers on Monday November 2nd.

You can also read the edition on-line at YUDU – we have now changed the price for each individual edition to £2.50 (from £3.00) so that if you buy single edition access, a year costs exactly the same as a normal yearly digital subscription of £10. All YUDU subscriptions and sales support the Photoclubalpha website and forum. The price including the printed edition is £25 per year (worldwide).

Click to launch the full edition in a new window.

Each issue now has six sample pages viewable without purchase.

All of Icon’s professional Master Photo Digital magazines can be read free on line. The latest, June 2009, has just been published:

This magazines uses the same Flash Reader format as the 19 editions of Photoworld and – NEWLY ADDED! – five editions of Minolta Image from the 2002-4 period just before Konica moved in. We have been able to find complete, or very nearly complete, original archive files for these issues and create PDFs to convert for our subscription service.

Photoclub Alpha’s Photoworld quarterly magazine is now available as an on-line subscription without printed paper issues (you can print any pages you want from the Flash-viewable ‘book reader’ format editions, read on-line, or download to read when you like). The cost is just £10.00 per year and gets you the latest issue before it even reaches our susbcribers!

The five editions of MINOLTA IMAGE from 2002-2004 take the archive back to December 2002 with 23 past editions of the club magazine available to read. Your £10 now gets you over 800 pages right away.

You don’t even have to keep checking the site, you are sent an email anytime we add a new edition – or add to our archive of back issues. Already there are 19 issues of Photoworld covering from Spring 2004 to Spring 2009 – the entire history of the Alpha digital system from the Konica/Minolta merger onwards. That’s over 500 A4 pages of reviews, news, tests, portfolios, galleries, how-to-do-it and inspirational articles. To preview what’s on offer (see the covers, contents page and first couple of pages of each magazine free) click the link then click any cover thumbnail. You’ll get a preview of four pages, and the choice of a full subscription or the single issue price of £3. If you pay for the full digital subscription all the issues are unlocked including the next year’s new issues, and each archive edition as we add them.

PW Subscribe

You can also subscribe, worldwide, to both printed and digital editions – this subscription for £25 means you will get the next four printed magazine delivered to your door:

PW Digital + Printed

Here are two comments from readers:

“The current Photoworld copy I received yesterday again is of outstanding quality. It is easily the thinnest magazine I read in terms of mm width, yet content and printing quality are reason for great delight. The printing is so much better then any of the magazines for sale in Germany, it is breathtaking every time.” - Markus Spring

“The best ten quid of any Minolta/Sony owner’s money has to be on YUDU, right now. I have just paid (through PayPal) and have access to every copy (it seems) of Photoworld magazine from early 2004. That’s 19 editions and the on-screen presentation is fantastic, not to metion the opportunity to download and read offline. I love magazines, I especially love photography magazines, and to be able to read the back catalogue of Photoworld is an absolute steal for that price.” - Brian Young

Postal subscription only Paypal options

You can subscribe to the printed edition only (no digital edition access) using our online Paypal subscription service.

We have just published the latest edition of the MPA magazine, Master Photo Digital, on-line at YUDU. This format is the same as the Flash Reader format used for the subscriptions to Photoworld on-line (digital subscription).

MPA’s magazine is free. Only full-time professional photographers are eligible to become members, but you can all read the mag.

- DK

It’s been a marathon exercise – all 18 editions of Photoworld, from the time of the Konica Minolta merger to our last (January) back issue, have been converted to a really great readable format (using Flash Player) which you can view via your web browser, print out or download for off-line reading. We have now added five more earlier editions of MINOLTA IMAGE, taking the archive back to December 2002 – plus two compendiums of reviews and articles from our other magazines.

The cost to access all these back issues – over 750 pages, fantastic portfolios, technical reports and tests covering the entire history of the Alpha digital system – is just £10 (by Paypal) and also gets you a full year of new Photoworld issues in advanced of the mailed copy. Or instead of it, if you prefer to subscribe this way. £25 now buys the postal magazine subscription plus the e-version and archives, worldwide.

We are now accepting images for entry to the Summer edition Photoworld magazine Gallery pages. Non-subscribers may submit via this email address up to three images per quarter/issue only (subscribers to the magazine may submit an unlimited number). Images should be no larger than 2000 x 3000 pixels or the equivalent data size for panoramas (6 megapixels). They should saved as AdobeRGB or sRGB JPEG files, with embedded ICC profile and intact EXIF data, to level 8 quality (High) or better. Your details, caption, copyright information, website URL, email address etc should be written into the file EXIF/IPTC fields – use ‘File Information’ in Photoshop File Menu to view and edit these text fields.

You may also put caption, website, etc information in a separate text document attachment or in the body of your email.

The picture/s must have been taken on Minolta, Konica Minolta, Sony or Sony Alpha equipment. Scans from slides, negatives or prints are accepted and full details must be provided of equipment used. EXIF data will be used to confirm the origin of digital entries.

Do not use ‘Save for Web’ as this will strip out your colour profile, EXIF camera data and IPTC caption data!

gallery@photoclubalpha.com

The terms are single use in the publication, website and on-line PDF edition. One year’s subscription will be given to the photographer for each image chosen for use (if you already have a subscription, you may nominate a friend or family member to receive this as a gift, starting with the issue featuring your photo). One extra copy of the magazine featuring your image will also be supplied. A byline and web link to your URL (live in the PDF edition) will be printed.

Gallery is an edited competition, not a judged competition. Pictures are chosen which work well as pages, spreads, pairs or fit a theme chosen by the editors. Images may be filed and carried over to future issues if they are of merit and may fit in with future theme.

The closing date for the Summer issue is June 30th.

- David Kilpatrick

For any large circulation magazine to create a page section which folds out to view a A2 size is too expensive to consider – but Photoworld, subscribed to by enthusiasts and printed in a short run of only 1,600 copies, goes out on November 5th with a foldout sample image.

If you are on the verge of making a decision, I’m here to help your think clearly – even if it means breaking some cherished behaviour patterns. I am going to help you think of the Alpha 900 not as a logical progression from the 700, but as a different camera system entirely.

Today I took delivery of a Sony 70-300mm f/4.5-5.6 G SSM lens. There is no doubt this is the best built Sony SAL lens I’ve handled (the CZ 135mm 1.8, 85mm f1.4 are a class above again). It weighs over 800g with its lens-hood, which is one of the most efficient deep tele hoods I’ve seen.