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PostPosted: Wed Oct 20, 2010 4:00 pm 
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Why does the Canon ring mount for the 70-200 f4L USM cost $140 (e.g. here), whereas a third party mount costs as little as $20 (e.g. here)? Reading the comments on these two sites does not reveal anything seriously wrong with the Opteka mount. I can't understand the Canon costing seven times as much. Am I missing something?


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PostPosted: Wed Oct 20, 2010 4:48 pm 
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Location: Boca Raton, FL, USA
To make money. That's pretty much it! Canon's reasonably priced and vast lens selection is a nice perk for Canon shooters, but the hidden fine-print where Canon makes a lot of money are in trivial little bits like collars and hoods, that are often times exorbitantly priced - and often times aren't included in the lens purchase as they are with other manufacturers. Everyone's gotta make a buck where they can.

Whether a third-party one is as good, or as reliable, depends on the third party - in general they're probably fine, but I'd inspect it before relying on it, to make sure it isn't too cheaply made - like with screw grooves carved into pot metal, or cheap hinges that could easily snap, or tripod screws that are too short and don't bind in well enough. If it passes basic tests like that, I'd personally be OK with a third party part.

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Justin Miller
Sony DSLR-A580 / Sony 18-250mm / Minolta 50mm F1.7 / Sigma 30mm F1.4 / Tamron 10-24mm / Tamron 150-600mm / Tamron 90mm F2.8 macro / Minolta 300mm F4 APO
Sony A6000 / 18-55mm F3.5-5.6 / 55-210mm F4-6.3 / 10-18mm F4 / 35mm F1.8 / 16mm F2.8 / via manual adapter, lots of Pentax K mount, Konica K/AR mount, and Leica M mount manual lenses

Galleries:
http://www.pbase.com/zackiedawg


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PostPosted: Wed Oct 20, 2010 5:29 pm 
That's Canon for you... :)


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PostPosted: Wed Oct 20, 2010 5:45 pm 
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Joined: Sun May 25, 2008 12:48 pm
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Location: UK
$20 is insignificant money and worth a gamble on the 3rd party. Without having seen both in the flesh it is always hard to compare, but I would not be surprised if there is a build quality difference.

An example of that are lens hoods, since that has also been bought up. The Canon ones are much nicer than the ones I've seen from Sony/Sigma/Tamron/Olympus. In particular they put dark black fibres on the inside to prevent reflections. Of course you can argue if that's significant or even necessary, but it is a rarely mentioned extra feature.

And the cross brand value can be misleading. Show me the price for a comparable Sony or Nikon 70-400 f/4 with tripod mount for example :P

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Canon DSLRs: 7D2, 7D1, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 10-18, 15-85
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 50/1.4A, 150 macro, 120-300 f/2.8 OS
Compacts: Sony HX9V, Fuji X100.


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PostPosted: Wed Oct 20, 2010 7:08 pm 
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Joined: Mon Jan 18, 2010 3:52 pm
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Location: The Netherlands
There is a Sigma 70-200 F/2,8.........

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Ruben

Panasonic DMC-FZ18, Panasonic DMC-FZ28, Canon G5, Canon 350D, Canon 50D + BG-E2N
Tamron 17-50 2.8, Canon EF 70-200mm f/4L USM,
Canon 18-55 II plus lots of Minolta MD/M42 lenses and bodies


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PostPosted: Thu Oct 21, 2010 4:33 am 
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Joined: Wed Nov 18, 2009 5:23 pm
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Location: Boca Raton, FL, USA
Does Canon have a 70-400 F4? I haven't ever seen one for sale or around.

I certainly never claimed Sony or Nikon competes with Canon in selection!

But the closest we can come at Sony is the 70-400mm F4-5.6 G, which goes for around $1450 new...with tripod collar. And lens hood. :)

BTW - Many of Sony/Minolta's higher end G and CZeiss lens hoods have the felt lining too - they just don't on the basic lenses. My Minolta 300mm F4 has a beefy metal hood with tighten screw and felt black lined interior...and I'm quite sure it's 3-figures to replace!

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Justin Miller
Sony DSLR-A580 / Sony 18-250mm / Minolta 50mm F1.7 / Sigma 30mm F1.4 / Tamron 10-24mm / Tamron 150-600mm / Tamron 90mm F2.8 macro / Minolta 300mm F4 APO
Sony A6000 / 18-55mm F3.5-5.6 / 55-210mm F4-6.3 / 10-18mm F4 / 35mm F1.8 / 16mm F2.8 / via manual adapter, lots of Pentax K mount, Konica K/AR mount, and Leica M mount manual lenses

Galleries:
http://www.pbase.com/zackiedawg


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PostPosted: Thu Oct 21, 2010 6:43 am 
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Joined: Sun May 25, 2008 12:48 pm
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Doh! That's a typo by me. Of course I meant the 70-200 f/4 which was the original topic...

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Canon DSLRs: 7D2, 7D1, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 10-18, 15-85
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 50/1.4A, 150 macro, 120-300 f/2.8 OS
Compacts: Sony HX9V, Fuji X100.


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