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

I was going to post this on our Forum for NEX originally. It’s not good form to launch into what may be seen as ‘rival’ publications or journalists, so it’s the kind of thing which is often kept to blog pages or forum discussion. But Practical Photography is one the best-selling, and most powerful, photo magazines in the world.

So, I copied my ramblings and moved them here, instead of putting them in a forum post where just a few hundred people would see them. Tens of thousands of visitors see Photoclubalpha’s main site articles, and I want this to be seen, because it matters.

Sony has announced two new cameras this morning – but it’s not an announcement which will have Alpha system users rushing to the cashpoint and queuing at Sony Style. The Alpha 290 and 390 are dumbed-down versions of the 230/380 with user interfaces partly borrowed from the NEX including the built-in Help Guide. The rear 2.7 inch Clear Photo LCD screeen does most of the work of communicating with the user.

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The European press launch

David Kilpatrick recorded the proceedings at Le Meridien Lav Hotel, Split, Croatia on March 11th 2010 using a Zoom H2 portable digital recorder. Shirley Kilpatrick transcribed the audio, with subsequent editing to translate verbal output to read well as text. This is a multi-page document please use the PAGE navigation at the foot of each page to continue reading. It is a very long document.

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The Sony NEX-3 and NEX-5 cameras are ultra-slim interchangeable lens models, referred to as ‘ultracompact’ or ‘compact system camera’ models by Sony. The lens flange to film distance is only 18mm, compared to 44.5mm for the Alpha system and very similar figures for all popular SLR brands.

The Leica M and screw mounts, with under 1mm difference between them, are 10mm greater than this at around 28mm. Screw mount Leica lenses can be adapted to M even though there is only 1mm difference. With 10mm difference, almost any lens ever made for any camera – even the Robot system, original Contax, maybe even the Pentax 110 SLR – can probably be adapted to fit the E-mount. In fact it will accept 16mm and 35mm (half-frame) ciné, C-mount CCTV lenses, and subminiature camera lenses.

You name it, the NEX will be able to do it. Telescopes, microscopes, endoscopes, whatever. And Alpha lenses, and MD lenses. There is even enough ROOM with over 25mm the spare to fit a true retrofocus format reduction converter – that is, a 0.66X optical unit which condenses the image from a full frame lens to fit the APS-C sensor. It is already done in the video and ciné world, and these converters have a wonderful bonus. Your 24-70mm f/2.8 SSM lens becomes, with a 0.66X reducing converter behind it, a 16-46mm f/2. That’s right – the same way a teleconverter loses you a stop or two, a format reduction converter gains you a stop.

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SPLIT, Croatia, breakfast over - Sony Europe presents the new NEX-3 and NEX-5 mirrorless, HD video capable slim interchangeable lens APS-C digital cameras. This has been a launch anticipated by almost complete and accurate leaking of the specifications of the two cameras. Sony UK also provided advance information to all dealers, including pricing, before the press launch – allowing retail websites to have full data up and running as from May 11th.

Toru Katsumoto presents his team’s latest offering (he holds a silver NEX-3)

The entire system with accessories is to be available in June at once, no waiting for anything except the 18-200mm lens which will arrive a month later. Edit: the brochure says ‘October’ for the 18-200mm, at the presentation it was said that it would follow in a month or so. October is four months or so.

Are you an Alpha Male or an Alpha Female?

Never feel that your chosen camera makes you the odd one out in a herd of Canon and Nikon users! You are the leader not the follower…

Perhaps you are the only one at your college or your camera club with an Alpha. Well, we reckon that makes you Alpha material, so we have designed two neat logos combining the symbols for Male and Female with the Alpha glyph. It’s an official Photoclubalpha garment not official Sony!

It would have been great to start with a low-cost almost giveaway T-shirt, but the quality of these can be poor especially in black. Yes, even the best black cotton will fade with wear and washing but it is a good quality garment to start with. That’s why it has to be £13.95 including VAT and postage* to cover our costs.

The Polo Shirt is, we think, a real bargain. Various local clubs and societies, as well as sports teams, have had similar polo and rugger shirts made by our supplier with embroidered logos. They look great and wear well at £17.95 each including VAT and postage. Photo above: white male T-shirt, black female T-shirt, black female polo shirt. The polo shirts with the female logo are tailored for women’s fit. T-shirts are unisex.

The T-shirts have the web address of Photoclubalpha written neatly in the classic Minolta typeface across the shoulders on the back. The logo and male or female text line are printed centrally on the front.

The Polo shirts only have the logo motif on the front, to a smaller size, in chest pocket position. There is no text, if anyone asks you what it means, you’ll have to explain it. The Polo shirts feature embroidered logos, the T-shirts are printed.

The T-shirt sizing is fairly generous – for example, size L is a neat fit for female size 20, loose on size 18.

Men’s Polos/all T-Shirts
XS – 34/46″
S – 36/38″
M – 38/40″
L – 40/42″
XL – 42/44″
XXL – 44/46″
3XL – 46/48″
4XL – 48/50″

Women’s Polos
(British Sizes – US sizes are one step smaller, XS=6 for example)
XS – 8
S – 10
M – 12
L – 14
XL – 16
XXL – 18

T-Shirts are unisex not tailored. Polo shirts are supplied in male tailored cut for Alpha Male, female cut for Alpha Female. T-Shirts are Heavyweight 100% Ringspun Cotton (175-180gsm); Polo Shirts are the same material, but a little heavier in weight.

Ordering by post

T-Shirts – available to in black or white, sizes XS to 4XL
Alpha Male – Black or White, with Alpha Male text line    £13.95
Alpha Female – Black or White, with Alpha Female text line    £13.95

Polo Shirts – available in sizes S to 3XL (M) XS to XXL (F)
Alpha Male – Black or White without text small symbol    £17.95
Alpha Female – Black or White without text small symbol    £17.95

The shirts are printed (for T-Shirts) or embroidered (for Polo Shirts) locally in Kelso and you may specify any size within the range shown; depending on demand, it may take up to 28 days for orders to be completed and despatched. We hope to keep stocks of popular sizes for faster delivery. Prices include VAT and postage*.

Cheques payable to ‘Icon Publications Ltd’ – orders to Alpha Shirts Offer, Icon Publications Ltd, Maxwell Place, Maxwell Lane, Kelso, Scottish Borders TD5 7BB. You may also post an order using the method described for fax orders below.

Ordering by email or fax

FAX your order with credit card (long number, cardholder name, security number and expiry date) and address information, written out with clear instructions for the garment/s, male/female design, colour and size required, to +44 (0) 1573 226000. Faxes are retained until you confirm receipt of order and shredded afterwards; we do not store credit card details, repeat orders need information repeating.

Alternatively, scan your document and attach it to an email sent to david@photoclubalpha.com

Ordering by Paypal BUY IT NOW - you must detail your size requirements using the Comments or Message field provided by Paypal, or in a clearly linked email. If you do not state size requirements, we will send size L.

Alpha Male T-shirt White

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Alpha Male T-shirt Black

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Alpha Female T-shirt White

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Alpha Female T-shirt Black

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Alpha Male Polo Shirt White

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Alpha Male Polo Shirt Black

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Alpha Female Ladies’ Polo Shirt White

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Alpha Female Ladies’ Polo Shirt Black

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View Order Cart

* For orders outside Europe, VAT is not applied. The 17.5% VAT saving is used to cover additional postage costs for worldwide buyers. The prices remain the same for all geographical areas. UK and European orders include VAT.

SONY has released a new alogrithm for raw conversion (deBayer) which offers improve high ISO noise. IDC (Image Data Converter) is the program issued with all Sony DSLRs. Up to now, no maker has ever revised their ‘house’ converter to offer high ISO improvement as a specific feature. The new version can be downloaded free by existing users (download link is provided at end of story). We have direct download links now for Windows and Mac OSX versions.

SONY has shown itself to be lagging behind the competition as we reach the third bend on the second lap of the development of HD-video capable DSLRs. At PMA 2010, nothing ‘real’ was shown and the closest they came to further launches in the Alpha range was an advanced pre-production prototype of a 24mm f/2 Carl Zeiss T* ZA SSM.

But Sony may prove yet to be the tortoise – or perhaps to be Brer Rabbit. They could make the finishing line, the goal of a truly useful video DSLR, before Nikon/Canon/Pentax/OlySamPanny get there.

TOKINA lenses – the brand name for optical giant Hoya’s interchangeable range – have always been renowned for their tank-like build quality and resistance to plastic trends. They compare so well with Nikon’s own lenses it is hard to tell the difference by feel, and the current design also matches Nikon more than it does Canon.

The latest news is that Tokina is to introduce the 11-16mm ƒ2.8 in Sony Alpha mount. Tokina stopped making Minolta mount lenses shortly before their parent company Hoya acquired Pentax. The Tokina factory has been producing