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Tamron couldn't stay behind in the 70-300 race, and also will trump Sigma in specs. Where Sigma refused to put the HSM drive in besides the OS, Tamron will even put in an USD (ultrasonic silent drive) focus motor in the lens. I am curious how this lens will turn out to be in performance, so far the specs, VC and USD, sound like a true Nikon/Canon alternative.
Let's hope the SP on the lens is like the SP on the macro 90mm and truly means Superior Performance.

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- Wout -
Nikon D80 with 18-70 DX, 70-300 VR, 35 1.8 DX
Manfrotto 055XPROB tripod with 488RC0 midi ballhead
Lowepro CompuRover AW and Nova 200 AW

Ooh, very interesting. Have a link to the announcement to save others looking for it.

I haven't seen detailed reviews on the Sigma 70-300 OS yet, but it isn't an EX designated lens. The Tamron is SP, so while it should be better, it'll likely be more expensive too. So as always, price vs performance will be key, as the Canon 70-300 IS USM and Sony 70-300G SSM are already excellent lenses in that range, I think to beat it optically will be too big a challenge so they will have to compete on price.

Most interesting is Tamron's USD, this is the first I heard of it. It is certainly the biggest weakness of Tamrons, and once they roll that out into their lineup particularly on the higher end, I think they will be much more attractive.

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Canon DSLRs: 7D, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 15-85 IS
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 150 macro, 120-300 f/2.8 OS, Celestron 1325/13
Tinies: Sony HX9V.

Reading the specs it sounds almost a 1:1 copy of the Nikon, so I hope its either glass weigth added or also body construction
Press release at Tamron and Nikon's specs

Tamron vs. Nikon
Focal length: 70-300
Max. aperture: 4-5.6 vs. 4.5-5.6
Min. aperture: 32-45 vs. 32-40
Diaphragm blades: 9
Elements/Groups: 17/12
Min. focusing dist.: 1.5m
Max. repr. ratio: 1:4 (Tamron lost the Macro setting)
Weight: 765gr vs. 745gr
Size: 81.5x142.7 vs. 80x143.5
Filter size: 62mm vs. 67mm

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- Wout -
Nikon D80 with 18-70 DX, 70-300 VR, 35 1.8 DX
Manfrotto 055XPROB tripod with 488RC0 midi ballhead
Lowepro CompuRover AW and Nova 200 AW

Tamron vs. Sony (no OS/IS/VR/VC)
Focal length: 70-300
Max. aperture: 4-5.6 vs. 4.5-5.6
Min. aperture: 32-45 vs. 22-29
Diaphragm blades: 9
Elements/Groups: 17/12 vs. 16/11
Min. focusing dist.: 1.5m vs. 1.2m
Max. repr. ratio: 1:4 (Tamron lost the Macro setting)
Weight: 765gr vs. 760gr
Size: 81.5x142.7 vs. 82x135.5
Filter size: 62mm

Tamron vs. Canon
Focal length: 70-300
Max. aperture: 4-5.6
Min. aperture: 32-45
Diaphragm blades: 9 vs. 8
Elements/Groups: 17/12 vs. 15/10
Min. focusing dist.: 1.5m
Max. repr. ratio: 1:4 (Tamron lost the Macro setting) (Canon is approx. at 0,26)
Weight: 765gr vs. 630gr
Size: 81.5x142.7 vs. 76,5x142.8
Filter size: 62mm vs. 58mm

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- Wout -
Nikon D80 with 18-70 DX, 70-300 VR, 35 1.8 DX
Manfrotto 055XPROB tripod with 488RC0 midi ballhead
Lowepro CompuRover AW and Nova 200 AW

Yeah, looks quite similar to the Nikkor from the outside!
And even the number of lenses and lens-groups is identical: "Elements/Groups: 17/12"
But this will be the real challenge for Tamron: banging 17 lenses together and still have good contrast, low flare and precise assembly for good centering.

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Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews, My Pictures, My Photography Blog
D800+assorted lenses

Tamron EU has some sample pictures, not that special or revealing

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- Wout -
Nikon D80 with 18-70 DX, 70-300 VR, 35 1.8 DX
Manfrotto 055XPROB tripod with 488RC0 midi ballhead
Lowepro CompuRover AW and Nova 200 AW

oooo me interested

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Haz camra .. can click

http://www.iainj.webs.com/ - under construction

Anyone want to take a guess as to the price?

I wonder how well it will do compared to the Canon 70-300mm?

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Panasonic Lumix DMC-ZS3 (Lumix DMC-TZ7)

500-600 euro should make it as MSRP about at a price I would expect.

Current street prices:
360 euro is the price for the Nikkor
440 euro for the Canon
760 euro for the Sony

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- Wout -
Nikon D80 with 18-70 DX, 70-300 VR, 35 1.8 DX
Manfrotto 055XPROB tripod with 488RC0 midi ballhead
Lowepro CompuRover AW and Nova 200 AW

uh why the strange size 62mm for filters?

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Nikon D40
Nikon 18-70mm f/3.5-4.5 G IF-ED DX

Removed

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canon 400D
18-55 lens
tamron70-300 lens
sigma 18-200 os lens

All my photos are clickable
my flickr
http://www.flickr.com/photos/27828538@N03/

As far as I know the new 70-300 (with built in AF motor and image stabilisation) is not yet available nor are any prices confirmed. 130 pounds sterling seem very cheap for a lens with the new specs

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- Wout -
Nikon D80 with 18-70 DX, 70-300 VR, 35 1.8 DX
Manfrotto 055XPROB tripod with 488RC0 midi ballhead
Lowepro CompuRover AW and Nova 200 AW

Hi Woutk89, i posted in the wrong thread
Sue

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canon 400D
18-55 lens
tamron70-300 lens
sigma 18-200 os lens

All my photos are clickable
my flickr
http://www.flickr.com/photos/27828538@N03/

For Nikon users, the lens will be available by the end of the month (august) for $450, a very competitive price point!

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- Wout -
Nikon D80 with 18-70 DX, 70-300 VR, 35 1.8 DX
Manfrotto 055XPROB tripod with 488RC0 midi ballhead
Lowepro CompuRover AW and Nova 200 AW

Good news for those who like a little variety in their lens shopping options. The price is looking reallllly good at $449 USD. I think it'll be a good performer too, given Tamron's track record lately.

Here's a little pre-review I wrote on my blog: http://www.aputure.com/blog/2010/08/11/ ... re-review/

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www.aputure.com/blog