Page 53 - Amateur Photographer - August 5, 2017

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A patent holds a lot of interesting information Advertising
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about the ownership of lens manufacturing Inserts Call Mona Amarasakera,
Canopy Media, on 0203 148 3710
Editorial team
Group Editor Nigel Atherton
Deputy Editor Geoff Harris
y attention was f/4-5.6 is claimed by Tamron. All Panasonic 25mm f/1.4, which is PA and Senior Brand Assistant Leeanne Wright
drawn recently the Zeiss Batis brand lenses are actually branded Leica. Technical Editor Michael Westlake
Andy
Topham
Deputy Technical Editor
to a number of claimed by Tamron (see my article What does this all mean? As I Technique Editor Tracy Calder
M interesting lens in AP 28 November 2015). outlined in my earlier article, this is a Senior Features Writer Oliver Atwell
News editor Hollie Latham Hucker
patents that have been posted on Most of the Panasonic Micro result of the manufacturing
News assistant Liam Clifford
Camera-wiki (camera-wiki.org/wiki/ Four Thirds lenses branded Leica methodology known as ‘OEMing’, Production Editor Jacqueline Porter
lens_patents). While not every are claimed by Panasonic, which whereby one company contracts an Chief Sub Editor Jolene Menezes
Senior Sub Editor Amanda Stroud
design is patented or patentable, does not surprise anyone familiar ‘original equipment manufacturer’ Art Editor Sarah Foster
many companies will take out a with these lenses. Hasselblad to manufacture products on its Senior Designer Robert Farmer
Digital Editor Jon Devo
patent if they think it contains lenses are claimed by Fujifi lm, behalf. The assignment of the Studio Manager Andrew Sydenham
original intellectual property. which will not surprise anyone intellectual property rights shows Picture Researcher Rosie Barratt
Video Production Dan Laughton
Lens designs are particularly who knows the history of the that in many cases this is not simply Photo-Science Consultant Professor Robert Newman
easily patentable, since every Hasselblad H series. a manufacturing subcontract, but a Senior contributor Roger Hicks
confi guration is in detail different, Some other oddities are the ‘design and build’ arrangement. Special thanks to The moderators of the AP
website: Andrew Robertson, lisadb, Nick Roberts,
so the claims in lens patents tend Olympus M. Zuiko 75mm f/1.8, This makes a lot of sense in the The Fat Controller
to be along the following lines: which is claimed by Sigma, as are world of lens design, because Advertising
‘A fi rst lens group having positive the 8mm f/1.8 and 25mm f/1.8. much of the design of a lens is Commercial Manager Liz Reid 07949 179 200
Commercial Director Dave Stone 07961 474 548
refractive power, a second lens More interestingly, so is the determined by the manufacturing Production Coordinator Andrew Durrant 0203 148 2694
group having negative refractive process used to make it. A lens Marketing
power, a third lens group having ‘A lens designed designed to be built in one factory Head of Marketing Samantha Blakey
positive refractive power, an could end up being quite different Publishing team
aperture stop, a fourth lens group to be built in one from a lens for another factory. Chief Executive Offi cer Marcus Rich
Oswin Grady
Group Managing Director
having a positive refracting power, factory could end up Lens designers within a company Publishing Director Simon Owen
a fi fth lens group having a positive are familiar with their own Group Magazines Editor Garry Coward-Williams
refracting power, and a sixth lens being quite diff erent processes and achievable Printed in the UK by the Wyndeham Group
Distributed by Marketforce, 5 Churchill Place,
group having a negative refracting from a lens for tolerances, so if a company wishes London E14. Telephone 0203 787 9001
power. Wherein the fi rst lens to subcontract manufacture, ‘design
group is composed of three another factory’ and build’ is a sensible option.
lenses, and the distance from an Editorial Complaints We work hard to achieve the highest standards of
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This is a quote from the patent shorten or modify any letter or material submitted. Time Inc. (UK) or its
associated companies reserves the right to re-use any submission sent
for the Zeiss Touit 50mm f/2.8 to the letters column of Amateur Photographer magazine, in any format
or medium, WHETHER PRINTED, ELECTRONIC OR OTHERWISE Amateur
macro lens, submitted by Fujifi lm Photographer® is a registered trademark of Time Inc. (UK) © Time Inc.
(UK) 2017 Amateur Photographer (incorporating Photo Technique, Camera
Corporation. Since companies Weekly & What Digital Camera) Email: amateurphotographer@timeinc.
com Website: www.amateurphotographer.co.uk Time Inc. switchboard
patent to protect their intellectual tel: 0203 148 5000 Amateur Photographer is published weekly (51 issues
per year) on the Tuesday preceding the cover date by Time Inc. (UK),
property, the claimant has a very 161 Marsh Wall, London E14 9AP. Distributed by Marketforce (UK) Ltd, 5
good indication of which company Churchill Place, London E14. ISSN 0002-6840. No part of this publication
may be reproduced, stored in a retrieval or transmitted in any format
designed and developed the lens, or medium, whether printed, electronic or otherwise, without the prior
written permission of the publisher or the editor. This is considered a
especially since it absolutely breach of copyright and action will be taken where this occurs. This
magazine must not be lent, sold, hired or otherwise disposed of in a
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accept responsibility for loss or damage to unsolicited photographs
Zeiss is also an assignee. and manuscripts, and product samples. Time Inc. (UK) reserves the
right to use any submissions sent to Amateur Photographer Magazine in
This is not always the case. The any format or medium, including electronic. One-year subscription (51
issues) £155.50 (UK), e 259 (Europe), $338.99 (USA), £221.99 (rest of
Sony lenses for its cameras are world). The 2015 US annual DEU subscription price is $338.99, airfreight
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Bob Newman is currently Professor of Computer Science at the University of Wolverhampton. He has been working with the design and development of
high-technology equipment for 35 years and two of his products have won innovation awards. Bob is also a camera nut and a keen amateur photographer
subscribe 0330 333 1113 I www.amateurphotographer.co.uk I 5 August 2017 53