Tamron's venerable 90mm macro has long been a favorite third-party lens for many SLR owners. The SP 90mm f/2.8 Di Macro 1:1 VC USD ($649) adds image stabilization (though Tamron calls it Vibration Compensation) and updates the aesthetic to match its recent SP lens offerings.
Extremely sharp; No distortion; 1:1 macro magnification; Optically stabilized; Available for multiple camera systems
Dim corners at wide apertures