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| p.1 #2 · Significant difference between Nikon/Sigma/Tamron TCs? 1.4x |
I don't have a strict comparison, but I can offer my opinions after several years of using all 3.
The Sigma TC's work best on Sigma lenses.
The Tamron TC's were my first TC acquisitions and they work "okay" on most any lens, but I've ended up throwing mine in the drawer, years ago.
The latest Nikon TCs are the best on any Nikon lens. The clarity and AF is noticeably better, at least to me.
If I had a 300 f/4, I'd put the latest Nikon TC on it.