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#41
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Nikon 70-300 VR lens
On 5/23/2012 9:37 PM, David Dyer-Bennet wrote:
These assertions that Nikon-branded lenses were made by Tamron (or anybody else) is a red flag to me. How do you happen to know that, and can you cite a source? That such things happen is frequently denied pretty authoritatively. Asking "Bruce" for sources is a waste of electrons. What is known is that the physical layout and specifications of the Nikon 70-300mm f/4~5.6 lenses (including element placement and size) were virtually identical to that of a contemporaneous Tamron. The Tamron had one small "LD" element towards the rear of the lens, the Nikon ED version had it's one ED element in the same spot. When I asked, Nikon explicitly stated that the 70-300mm ED was made in a Nikon manufacturing facility. The Tamron 14mm f/2.8 and the Nikon 14mm f/2.8D lens were also extremely similar physically. Trying to unravel keiretsu relationships among Japanese companies is beyond my research abilities, but I suspect these lens designs came out of some sort of joint R&D project. The Nikon 70-300mm f/4.5~5.6 VR was introduced in 2006. Tamron did not introduce a similar lens until 2010. Both are 17-element, 12-group designs. The Nikon boasts two ED elements -- the Tamron boasts one XLD and one LD element. The lens construction diagrams shown at each companies main website show slightly different placement of the interior elements but that may just be due to a different focus point. Making comparisons based on MTF charts from different sources is always suspect, but at 30 lp/mm the charts show quite different "spreads" between the sagittal and meridional traces. Here's a shot and 100% crop using a D800 and 70-300mm VR on a travel tripod. No, the lens doesn't get the most out of a D800, but in my opinion it's a good choice for a hiking or tourism telezoom. http://wemightneedthat.biz/Images/library.jpg http://wemightneedthat.biz/Images/pub.jpg -- Mike Benveniste -- (Clarification Required) You don't have to sort of enhance reality. There is nothing stranger than truth. -- Annie Leibovitz |
#42
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Nikon 70-300 VR lens
Bruce writes:
David Dyer-Bennet wrote: These assertions that Nikon-branded lenses were made by Tamron (or anybody else) is a red flag to me. How do you happen to know that, and can you cite a source? That such things happen is frequently denied pretty authoritatively. Did you know that Leica cameras are made in Portugal? Cameras that are around 99% complete are sent to Germany for final testing, adjustment and application of the 'red dot' so they can be claimed to be "Made in Germany". But the vast majority of the work was done in Portugal. What I don't get is why I would care. My point is that things are not always what they appear to be. Japan has a very long tradition of outsourcing components, assemblies and entire manufacture. There are thousands of small, medium and large Japanese companies making these items, a few of which are well known outside Japan such as Kino Precision, Cosina, Tokina and Tamron. But the fact that their input is anywhere up to 100% of the finished product is always denied by camera manufacturers who obviously wish to preserve the value of their brand. To help preserve the big names, the subcontractors set up companies that either bear the name of the camera brand, or include some equity from the big name company, or both. A classic example of this is the Kyocera-owned company that was called "Contax" and made "Carl Zeiss" lenses. A current example is Cosina, who make "Carl Zeiss" lenses for SLR and rangefinder cameras in parallel with the Voigtländer range. In the past, Cosina, Tokina and Tamron have made Nikon lenses. But don't ever expect Nikon to admit that. ;-) Or anybody to be able to show it's true. -- David Dyer-Bennet, ; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info |
#43
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Nikon 70-300 VR lens
In article , Bruce
wrote: In the past, Cosina, Tokina and Tamron have made Nikon lenses. But don't ever expect Nikon to admit that. ;-) Or anybody to be able to show it's true. No-one needs to "show" it is true because it is very widely known across the industry. yet nobody can provide any proof. strange. The Nikon users who buy pro quality Nikon glass don't need to worry because their lenses were assembled in a Nikon-owned factory. The people who buy and use the cheap and nasty consumer-grade Nikon-branded lenses that are made by contractors don't care. What matters to them is the Nikon badge which sets their lens apart from one with a Cosina, Tokina or Tamron badge. Who actually made the lens is of no concern. It's a "Nikkor" because it says so on the lens and that is all that matters to them. if it says nikkor then it's made to higher specs than something that cosina or whatever, assuming it's made by someone else, that is. All this is so widely known that it appears on Wikipedia. *that* is your proof?? seriously? |
#44
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Nikon 70-300 VR lens
nospam wrote:
In article , Bruce In the past, Cosina, Tokina and Tamron have made Nikon lenses. But don't ever expect Nikon to admit that. ;-) Or anybody to be able to show it's true. No-one needs to "show" it is true because it is very widely known across the industry. yet nobody can provide any proof. strange. Bruce says it, ain't that enough proof? All this is so widely known that it appears on Wikipedia. *that* is your proof?? seriously? Actually, the proof is that it's being talked about in Usenet. And Bruce probably added it to Wikipedia. -Wolfgang |
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