Finally completed my "Aliens Lens" Collection today. Got my Lens Number 14 (should have been 17th – gave 2 spare kits lens to 2 colleagues weeks ago and gave one spare to an expert repairer a month ago). This time, it’s a Tamron – to complete my "Famous Four" of Cosina, Sigma, Tamron & Tokina. Of course, there are other Canon-Mount Lens like Vivitar (Cosina Made), Mamiya, Carl Zesis, Zenitar, Samyang and a few other lesser brands, but the "Famous Four" is probably the most popular among the 3rd party brands. This Tamron is a Di lens, that means it is compatible with my 5D Mark II & my cropped bodies like the 500D & 350D-IR (with corresponding increased range to 44-465mm) . Best of all, it can also be used on my film SLR EOS 88 (3000QD) (also using EF Series Lens)!

* picture: Tamron 28-300mm F/3.5-6.3 XRDi LD Aspherical IF Macro
First impression of the lens was really good. The build quality is better than Tokina but slightly lower than of Sigma. What I like is the range (and price) of this lens which made this lens a super walk about lens covering a wide angle to super telephoto. Photos turned out sharp and crisp and when the apeture is wide open at F3.5 (28mm stop), this lens gives very nice bokeh when the subject is about 4 metres away. At the 300mm end, picture quality suffer a bit unless you are shooting in bright-lighting-sunny condition. At F6.3, the widest at 300mm stop, pictures can be good if compensated with ISO as this lens has no Vibration Control (VC – similar to IS, VR, SS, OS, etc.) So it is a tad challenging if the subject is moving and you don’t have a tripod with you. For the price I paid, this can be ignored or somewhat negligible. Just compare this lens with the Canon’s nearer equivalent, the Canon EF 28-300mm F3.5-5.6L IS USM, this Canon multi-purpose zoom is selling at a RRP of SGD $4599 (Street Price Differs) and I paid less than 10% of the Canon’s RRP. And weight/ size wise, this medium sized Tamron is way smaller than Canon’s EF.
EF 28-300mm F3.5-5.6L IS USM
Diameter 92mm x Length 184mm
Weight 1670gm.
Tamron 28-300mm F/3.5-6.3 XRDi LD Aspherical IF Macro
Diameter 54.6mm x Length 91mm
Weight 420gm

* picture: Tamron 28-300mm F/3.5-6.3 XRDi LD Aspherical IF Macro
Though this lens is built much smaller than most of its competing counterparts, this lens is solid in build and the feel of the lens is good. Zoom is smooth (smoother than Tokina) and it feels more expensive than it really is. However, when zooming to 300mm, the lens erects out "extensively" and it became much longer than other similar lenses in the same category. This is however, a like or hate thing depending on individuals. Oh yes, this Tamron can do Macro too. Though not exactly a real macro lens (Real Macro Lens are Prime Lenses) , the magnification capability is close to the real thing (1:2.9). Focusing speed is not super fast, but acceptable as "quite fast".
For Infra Red Photography, this lens is average. Hotspot sometimes appears randomly. Most of the time hotspots appear when the lens is at 28mm, when zoomed, hotspot does not appear – please note.