Canon EF 100mm F/2 USM vs Canon EF 100mm F/2.8 Macro USM — Which Is Better?

The Canon EF 100mm F/2 USM and the Canon EF 100mm F/2.8 Macro USM are both full-frame prime lenses for the Canon EF mount on the Canon EOS system, released in 1991 and 2000 respectively. They share the same 100mm focal length, so both frame portraits, details and compressed landscapes identically from the same position.

The real choice between them is speed versus close-up reach. The F/2 offers a wider maximum aperture, while the Macro delivers life-size magnification for close-up work.

The F/2 is the smaller, lighter lens to carry and pack. It measures 74 mm long and weighs 460 g, while the Macro runs 119 mm long and weighs 600 g. Diameters are closer, at 75 mm against 79 mm.

A useful match is that both accept front filters and both use the same 58 mm thread, so one set of 58 mm polarisers and ND filters fits either lens without adapters.

The Macro USM is the clear choice for close-up photography: it focuses as near as 31 cm and reaches 1x life-size magnification, enough to fill the frame with a flower, insect or jewellery detail. The F/2 focuses no closer than 90 cm and stops at 0.14x magnification, which limits it to conventional subject distances.

The F/2 answers with a wider f/2 maximum aperture against f/2.8 on the Macro. That admits more light for portraits and dim indoor venues, with shallower depth of field for background separation. Both lenses offer autofocus plus a manual focusing ring for fine control.

Protection and assistive features match: neither lens offers image stabilization, weather sealing, a fluorine coating or teleconverter support. Without stabilization, handheld work at 100mm relies on shutter speed and technique, so both lenses benefit from a faster shutter or a support in low light.

The Macro carries the larger optical formula, 12 elements in 8 groups against 8 elements in 6 groups for the F/2. Neither lens uses aspherical or special dispersion elements in its design.

Both use internal focusing, so the barrel does not extend as focus changes. That helps when working close to a subject and keeps the lens at a constant length.