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Nikon 70-300 VR lens



 
 
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  #41  
Old May 25th 12, 04:23 AM posted to rec.photo.digital.slr-systems
Mike Benveniste
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Posts: 53
Default 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  
Old May 25th 12, 05:10 AM posted to rec.photo.digital.slr-systems
David Dyer-Bennet
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Posts: 1,814
Default 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  
Old May 25th 12, 02:45 PM posted to rec.photo.digital.slr-systems
nospam
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Posts: 24,165
Default 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  
Old May 27th 12, 09:29 PM posted to rec.photo.digital.slr-systems
Wolfgang Weisselberg
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Posts: 5,285
Default 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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