Tamron Telephoto lens

[tekguy22]

Hey all...Just upgraded my equipment to include a Canon Digital Rebel EOS Xsi and I'm looking for some lenses for it. specifically a telephoto lens and I found one on Ebay that I'm not sure about...has anyone heard of Tamron...any good..anyone have one of these or lenses of the same brand name??? it's a 75-300 mm lens

here are the specs
Lens Construction: 13 elements in 9 groups
Angle of View: 34°-8°
Minimum Focus Distance: 4.9' (1.5 m)
3.1' (0.95 m) in macro mode
Macro Magnification Ratio: 1:2
f/Stop Range: 4-22
Filter Size: 62mm
Dimensions (diameter x length): 3.0 x 4.6 in. (76mm x 117mm)
Weight: 15.3 oz. (435g)