This teleconverter is NOT recommended for lenses wider than 90mm, e.g. 50mm, 28-105mm, etc. However, full AF operation is still only possible with lenses with open aperture of f/2.8 or brighter. Please be aware that AF will work properly only if there is enough light and contrast on the subject to activate the camera's AF sensors. Manual focusing is recommended when using lenses with smaller open f-stop value than those given above.
Note! When used with lenses with smaller maximum apertures (f/4 and f/5.6, for example) there will be little difference in image quality as compared with the standard Tamron teleconverters. When used with lenses wider than 90mm the SP teleconverters can actually compromise image quality.
|Weight||4.6 oz (132 g)|