The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 90mm f2.8 Macro and the Tamron 60mm f2 II LD IF Macro for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Tamron 90mm f2.8 Macro is the longer of the two lenses at 97mm. The Tamron 60mm f2 II LD IF Macro with a length of 80mm, is 17mm shorter. On the other hand, the Tamron 60mm f2 II LD IF Macro has a larger diameter of 73mm compared to the Tamron 90mm f2.8 Macro's 72mm diameter.
The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Tamron 60mm f2 II LD IF Macro weighs 400g, 1% (5g) lighter than the Tamron 90mm f2.8 Macro's weight of 405g.
Below you can find the dimension and weight table of the Macro Prime Lenses in Sony Alpha Mount for size comparison purposes.
Macro Prime Lenses in Sony Alpha Mount for Size Comparison
Lens Mounts
Both the Tamron 90mm f2.8 Macro and the Tamron 60mm f2 II LD IF Macro has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Tamron 90mm f2.8 Macro is also available in Canon EF , Nikon F (FX) and Pentax KAF mounts.
Tamron 60mm f2 II LD IF Macro is also available in Canon EF and Nikon F (DX) mounts.
Focal Range
Tamron 90mm f2.8 Macro is a prime lens with fixed focal lenght of 90mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 135mm.
Tamron 60mm f2 II LD IF Macro is a prime lens with fixed focal lenght of 60mm which has an effective (full-frame 35mm equivalent) focal range of 90mm when used on a APS-C / DX format camera.