Purchased Tamron SP AF17-50mm F/2.8 XR

FINALLY!!! I bought a new standard zoom lens for my beloved Canon 30D. As a replacement for my kit lens 18-55 F/4-5.6, this lens not only give me a sharper image at the 17mm range, it also provide a large aperture size of F/2.8. Which proofed to be super useful when taking portrait or night shot. Please find the spec for this lens below.

終於入手了，TAMRON 的 A16。之前一直用 CANON 的 KIT LENS, 真的夠了。這支標準鏡不單於廣角端時成像比 KIT LENS 銳利，它更有恆定 F/2.8 光圈值。真的不錯。以下是此鏡的資料。

Model	A016
Lens Construction (Groups/Elements)	13/16
Angle of View	78°45'-31°11' (APS-C size equivalent)
Type of Zooming	Rotation
Diaphragm Blade Number	7 (Circular apertures)
Minimum Aperture	F/32
Minimum Focus Distance	10.6in.(0.27m)
Macro Magnification Ratio	1:4.5 (at f=50mm MFD 0.27m)
Filter Diameter	ø67
Weight	430g (15.2oz)
Diameter x Length	ø2.9 x 3.2in. (ø74.0 x 81.7mm)