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Keywords: Tamron Canon Minolta Nikon Pentax TC 2X AF


Registered: January 2014
Posts: 37
Tamron 2X F AF review by joe88
Review Date: 1/30/2015 Would you recommend the product? Yes | Total Spent: $50.00| Rating: 9 

Pros: very sharp 7/5 element AF-converter
Cons: aperture information is done to Pentax cam's

this is my favorite converter for macro shootings

if your basic lens is well corrected, you'll get very sharp shootings,
but I stop down lens for macros or close-ups to f8-11

For tele shootings of birds f.e. I've developped a trick:
an additional macro ring with achromatic focal reductor will
eliminate any CA, stopped down to f8-11, too.

my high recommendation

high contrast, good color redition and really sharp photos

Registered: November 2009
Posts: 21
Tamron 2X F AF review by lightknight
Review Date: 1/31/2010 Would you recommend the product? Yes | Total Spent: $120.00| Rating: 8 

Pros: Cheap, good
Cons: doesnt report actual aperture, some CA

For the money this TC is great and it frequently amazes me. I use it exclusively with my Nikkor 80-200 ED F2.8 and D700 for wildlife and some action work. Its important to remember with any TC that if your object lens is not sharp your TC will not magically make it simply multiplies what you give it. For example the 80-200 2.8 is somewhat soft at 200mm irrespective of the aperture , whereas is extremely sharp at 80-135. So put the tamron on set the zoom to 105 and hey presto its real sharp at 200mm equivalent....albeit 2 stops slower.
Have a look at the shot below: this was taken with the TC on and is a 50% crop from the original photo.

where it comes unstuck is with focus speed. I am not sure why but physically it seems to slow the focus motor down but in average conditions its capable of keeping up with a flying Gannet once the D700 locks on:-

By comparison I have used the Nikkor 300mm F4 with a 1.4 Nikkor TC in similar situations and its focus performance overall is inferior.
Its annoying it doesn't report the actual aperture as that screws up the EXIF. the only other issue is some CA but its not really bad.
Note its probably a Kenko clone or perhaps vice versa


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