May 26, 2018, 02:33:24 AM

Author Topic: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4  (Read 9747 times)

Canon Rumors

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Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« on: January 05, 2018, 12:44:19 PM »
It looks like Tamron may be entering the world of fast supertelephoto lenses. Three different optical formulas have appeared in the same patent application from Tamron.

Embodiment 1: 300mm F/2.8

  • Focal length: 304.799 mm
  • F No.: 2.8
  • ω: 3.997
  • Image height: 21.64 mm
  • Back focus: 70.1919 mm
  • Lens length: 298.38 mm

Embodiment 2: 400mm F/4

  • Focal length: 396.296 mm
  • F No.: 4.0
  • ω: 2.963
  • Image height: 21.64 mm
  • Back focus: 102.3549 mm
  • Lens length: 332.36 mm

Embodiment 3: 500mm F/4

  • Focal length: 485.045 mm
  • F No.: 4.001
  • ω: 2.530
  • Image height: 21.64 mm
  • Back focus: 125.2621 mm
  • Lens length: 420.001 mm

I think a 400mm f/4 is a lens missing from everyone’s lineup. Apologies to the Canon 400mm f/4 DO IS II, but I think a non-DO version would likely cost less and could give equal or better performance at the expense of reduced size and weight. Maybe there’s an engineering reason that I am unaware of as to why a non-DO 400mm f/4 doesn’t exist for Canon’s EF mount.

« Last Edit: January 08, 2018, 09:29:04 PM by Canon Rumors »
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Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« on: January 05, 2018, 12:44:19 PM »

robinlee

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #1 on: January 05, 2018, 01:22:07 PM »
Woo hoo, hope it is as good as their G2 releases.

chrysoberyl

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #2 on: January 05, 2018, 02:35:56 PM »
I usually don't post with nothing substantive to say (yes, I know that point can be argued) - but this is very interesting news.  Nothing long was interesting, until this.  500mm f/4!

And this may inspire the others to respond with similar offerings.

James Larsen

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #3 on: January 05, 2018, 04:03:58 PM »
I'm excited for these. Hoping Tamron hits it out of the park with these!

Pixel

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #4 on: January 05, 2018, 05:03:07 PM »
Kinda miffed that, apparently, nobody else wants to make a 600 f4.

slclick

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #5 on: January 05, 2018, 06:40:25 PM »
Sigma never made a mark across the board with long primes (which means don't chime in about a single particular great lens you owned once in a blue moon) so let's hope Tammy gets it right. There has never truly been econo choices for birding, let us hope.
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RGF

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #6 on: January 05, 2018, 07:19:56 PM »
400 F4 would be nice.

Also like to compare weight of these lenses to Canon's - assuming that they are brought to market

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #6 on: January 05, 2018, 07:19:56 PM »

rbr

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #7 on: January 05, 2018, 07:37:43 PM »
Tamron had an excellent 400 f4 with their adaptall mount years ago.

9VIII

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #8 on: January 05, 2018, 11:41:52 PM »
Kinda miffed that, apparently, nobody else wants to make a 600 f4.

The market for $10,000 lenses is just a bit too restrictive.

After what we've seen with the latest round of zoom lenses, theoretically they could get 400f4 out the door for under $2K.
Even if the element is a few mm larger, the overall design is so much simpler I can't see this costing much more than the 150-600G2.
That might even get some people to upgrade from the Superzooms.

Chaitanya

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #9 on: January 05, 2018, 11:48:55 PM »
400 f/4 now that's a lens that I would purchase for mammals. Perfect compromise when 400 f/2.8 is just too big and heavy..

Chaitanya

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #10 on: January 06, 2018, 01:54:07 AM »
Kinda miffed that, apparently, nobody else wants to make a 600 f4.

The market for $10,000 lenses is just a bit too restrictive.

After what we've seen with the latest round of zoom lenses, theoretically they could get 400f4 out the door for under $2K.
Even if the element is a few mm larger, the overall design is so much simpler I can't see this costing much more than the 150-600G2.
That might even get some people to upgrade from the Superzooms.
I highly doubt 400 f/4 will ever cost $2K even for a 3rd party manufacturer, more realistically it will come in around $3k-$3.5K.

Steve Dmark2

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #11 on: January 06, 2018, 05:31:25 AM »
Finally some news i really like.
Maybe this puts more pressure on canon to update their lineup.
Im interested to see the pricetag on the Tamron primes.

Cheers Stefan
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Don Haines

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #12 on: January 06, 2018, 07:41:05 AM »
Kinda miffed that, apparently, nobody else wants to make a 600 f4.

The market for $10,000 lenses is just a bit too restrictive.

After what we've seen with the latest round of zoom lenses, theoretically they could get 400f4 out the door for under $2K.
Even if the element is a few mm larger, the overall design is so much simpler I can't see this costing much more than the 150-600G2.
That might even get some people to upgrade from the Superzooms.
I highly doubt 400 f/4 will ever cost $2K even for a 3rd party manufacturer, more realistically it will come in around $3k-$3.5K.

Yet they came out with a 150-600 at $800.... and the G2 version of the 150-600 is $1400. 600 at F6.3 means a 95mm filter, while 400mm at F4 means a 100mm filter...... not much difference.... and the 400 prime would be shorter and not require the mechanicals for a zoom mechanism. They could easily do a G2 quality lens for $2000.
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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #12 on: January 06, 2018, 07:41:05 AM »

IglooEater

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #13 on: January 06, 2018, 08:47:05 AM »
Choice is normally good for the overall market, so I’m excited to see what comes from Tamron.  imho Sigma’s venture into that territory with the 500mm f/4 sports was just to expensive to choose over a used Canon edition.

LDS

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #14 on: January 06, 2018, 09:26:21 AM »
Canon had two 400/4.5 in the FD era, but they weren't brought to EF versions. Maybe they didn't sell that well?  Could there be more market for them today, when faster ISO are less an issue? Fast digital cameras and AF, plus cheaper travels, probably made wildlife photography more widespread, and maybe an f/4 may sell anyway.

Canon used rear drop-in filters, though, although I don't know how often filters are used on such lenses.

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Re: Patent: Tamron 300mm f/2.8, 400mm f/4, 500mm f/4
« Reply #14 on: January 06, 2018, 09:26:21 AM »