The Tamron SP AF 700mm F/28 Di LD (IF) macro telephoto zoom lens is made in Japan and features a constant fast aperture of F/28 with a typical Tamron build quality, meaning the fit and finish are nice, with a metal mount, but there is plenty of plastic to run your hand over, including the zoom ring, focusing ring, and most of the forward barrel sectionAnd an advantageous internal focusing (IF) systemThe Tamron SP 700 F/28 Di a highresolution ultracompact fast tele zoom Its F/28 aperture, SP performance and agile telephoto make it ideal for fast action sports to spot news to posh weddings Tamron's SP 700mm F/28 Di LD (IF) Macro exemplifies the second of the two zoom focal lengths considered essential by many professionals Tamron Sp Af 70 0mm F2 8 Di Ld If Macro Review Digital Photography Review Tamron sp af 70-200mm f/2.8 di ld flickr