Tamron Lenses
This section comprises of the Tamron lenses that I have personally used at some point in time. My rating is based on the summary of factors. Such as quality of the pictures in terms of sharpness and contrast, usability, distortions and what it has been designed to do, i.e. macro.
IF	IF (Inner or Internal Focusing) focusing is achieved inside the lens without changing its external dimensions
LD	Low Dispersion elements to minimise the affect of chromatic aberration
SP	Super Performance
XR	XR (Extra Refractive Index) glass in an innovative way in order to optimize the overall distribution of optical power throughout the entire zoom range (dpreview.com).
Di	Lenses are designed for exclusive use on digital cameras
Wide angle
	Used	Rating	Comments
14mm F2.8 AF SP	rarely	Excellent	Well built. Rectilinear Lens (vertical lines stay parallel). Sharp. Good value for money.
17-50mm F2.8 AF XR Di II	rarely	Excellent	Well built. Light. Works properly on Nikon digital SLRs. Color reproduction is very good.
20-40mm F2.7-3.5 AF	rarely	Average	Well built. No close focusing. Not very sharp wide open.
24mm f2.5 AI Adaptall2	rarely	Good	Well built. Small. 5 blade diagram. Low contrast.
28-200mm F3.8-5.6 AF XR Di Aspherical IF Macro	rarely	Average	Well built. No close focusing. Not very sharp. Lots of distortions.
Telephoto
	Used	Rating	Comments
80-210mm F3.8-4 Adaptall-2 Model 103A	rarely	Very Good	Well built. Very sharp. Heavy.
300mm F2.8 AF SP LD IF	rarely	Very Good	Well built. Lighter and smaller than equivalent Tokina lens. Older variants work inconsistently on Nikon digital SLRs. A lot of focus hunting occurs.