Forumhub Photography thread!

[Kalyasi]

Question to all: What is your opinion on 3rd party lenses like Sigma, Tamron, Tokina etc? For example Canon 100 - 400 L comes to 1400-1500 dollars. Sigma 50-500, almost the same price, but with a better focal range.
I am not worried about cost - Given a choice - Which would you choose from, from the same price range? a slightly more versatile third-party or the OEM with slightly lesser feature?
I presume there cannot be straight-forward answer. Just asking for experiences and opinion.

Sigma for Nikon cameras ok nu kelvi pattu iruken... Tamron, some of the lenses are good, some are mokkai...