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.
IFIF (Inner or Internal Focusing) focusing is achieved inside the lens without changing its external dimensions
LDLow Dispersion elements to minimise the affect of chromatic aberration
SPSuper Performance
XRXR (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).
DiLenses are designed for exclusive use on digital cameras
Wide angle
14mm F2.8 AF SPrarelyExcellentWell built. Rectilinear Lens (vertical lines stay parallel). Sharp. Good value for money.
17-50mm F2.8 AF XR Di IIrarelyExcellentWell built. Light. Works properly on Nikon digital SLRs. Color reproduction is very good.
20-40mm F2.7-3.5 AFrarelyAverageWell built. No close focusing. Not very sharp wide open.
24mm f2.5 AI Adaptall2rarelyGoodWell built. Small. 5 blade diagram. Low contrast.
28-200mm F3.8-5.6 AF XR Di Aspherical IF MacrorarelyAverageWell built. No close focusing. Not very sharp. Lots of distortions.
80-210mm F3.8-4 Adaptall-2 Model 103ArarelyVery GoodWell built. Very sharp. Heavy.
300mm F2.8 AF SP LD IFrarelyVery GoodWell built. Lighter and smaller than equivalent Tokina lens. Older variants work inconsistently on Nikon digital SLRs. A lot of focus hunting occurs.