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#1
11-12-2013, 10:02 PM
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The big issue I have with a lot of 3rd party lenses (Sigma, Tamron, Tonkina, etc) are the creature comforts.
USM motors, a lack of full time manual focus, extending /rotating lens barrels, general feel, build quality, etc. Optically they usually are decent, but I'm not always sold by the areas that they skimp on.
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Ross 9 Gallon Nano, Modular LED Lights 14 Gallon BioCube w/ Rebel LED Lights 67 Gallon Mixed Reef, Modular LED Lights Send in the Clowns - Clown Fish Breeding 5 Gallon Fry Hatchery and 15 Gallon Clown Grow Out Tank 
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