Best Prices for Tamron or Sigma on eBay

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Product(s) Price Bids Time Left
SUPER RARE Sigma 75-200 mm f/3.8 constant, MACRO, SONY and Minolta fit $158.00 0 2m
Sigma 17-50mm f/2.8 EX DC OS HSM FLD Lens for Canon EOS $594.00 28d 20h 37m
Sigma DL Macro 70 mm - 300 mm F/4.0-5.6 Lens For Minolta/Sony $75.00 0 28m
UIB Mint Rare Sigma Mirror Telephoto Multi-Coated 600mm F/8 Complete Japan $120.00 17 31m
Sigma 10-20mm 10-20 F4-5.6 EX DC HSM for Canon + UV $483.70 29d 17h 28m
Sigma EX 18 mm - 50 mm F/2.8 DC Lens For Nikon $125.00 2 41m
Sigma 50mm F1.4 EX DG HSM for Nikon $305.00 7 49m
Sigma Sport BC 1909 STS 3X Wireless Speed Cadence HR $77.87 20d 7h 22m
Sigma 18 mm - 50 mm F/2.8-4.5 HSM DC OS Lens For Canon $81.00 7 1h 27m
SIGMA Zoom 28-70mm 1:2.8 Amazing Condition fits Sony Alpha and Minolta Mounts $91.00 13 1h 36m

What is better Tamron or Sigma?

FAQ digital SLR camera's lenses

A: in my not so humble opinion...
it doesnt matter because they are both inferior to canon and nikon.
if I were foced to choose, I would try both on my camera and form a opinion based on my critique of image quality, lens construction and other

70-200mm f2.8 shootout -- Sigma OS vs Tamron vs Nikon VRII-- Part 1

Includes focus speed, hand holding and lens flare tests. blog.mattgranger.com See the Nikon here: goo.gl Outside Aus: goo.gl Sigma here: goo.gl ...

Tamron, Kenko Tokina boost Micro Four Thirds lens alliance

Tamron and Kenko Tokina , two third-party lens manufacturers, have thrown their weight behind the Micro Four Thirds alliance, helping Olympus and Panasonic during a major shift in the camera industry.

Olympus and Panasonic were the early entrants to a new class of interchangeable-lens cameras much more compact than traditional SLRs. They're both members of the Micro Four Thirds partnership that governs image sensors and lenses, meaning that Micro Four Thirds lenses can be used on either company's camera bodies.

The new membership, like that of third-party lensmaker Sigma before, means photographers can expect more variety for Micro Four Thirds cameras. That's important because right now, traditional SLRs have a much wider range available for photographers eager for fisheyes, supertelephotos, and anything in between.

will autofocus work if i put a 2x teleconverter on a 55-200 (tamron) with max aperture of 4-5.6?

If the teleconverter is designed for your device, then work ... somehow.

Remember, teleconverters "eat" the light, so that your f / 4 ~ 5.6 lens transmits the same amount of light to your sensor / film as af / 8 ~ 11 lenses. You are also mix your Tamron teleconverters with various third parties, so you can estimate the degradation of others on the edges of your images when shooting open. As you read further, you will see that when you use lenses that are slower than f/2.8 autofocus function is lost and you're back to hunting with manual focus.The maintenance of sharpness was correspondent f/11 when wide open (the focal length of 200 mm) is problematic to say the least. Stop two saves for the highest opening and you shoot in near darkness....