I have used the EF-S 60mm, multiple copies of the EF 100mm USM and EF 100mm L. They're all great lenses.
Any distinction between the 3 lenses based on sharpness makes little sense, they're all sharp, very sharp, and have good contrast & generally smooth bokeh. Particularly the difference in sharpness between the 60mm and 100mm USM is at a hyper-pixel peeping level … plus don’t forget lens to lens variation. The L on average is a smidge sharper… but I challenge people to find meaningful difference between all 3 lenses. (Too many pixel peepers, too few photographers!) #rantover
In the end I went for the 100mm USM (non L) –… and I got a good copy. Biggest bonuses / pros of the 100mm USM for me over the EF-S:
- Longer working distance (for both insects, and often helps with less problems with 'shadows'
- FF compatible (if upgrading to FF from APS-C)
- it can often be bought on sale here in Australia for good prices (significantly cheaper than the 100mm L, and often less expensive than the EF-S 60mm).
-
For some outdoor portraits, I really like 100mm length for outdoor portraits (and for indoor / general portraits, I most often use focal lengths of between 40mm and 85mm)… As I have had 50mm primes, another prime at 60mm is too close.
Hybrid IS helps for 3:1 and less so at 2:1 distances, but does little at 1:1 working distance handheld. At 1:1 the slightest sway (even when breathing, or trying to hold still, holding one’s breath in) – will render an out of focus (OOF) outcome. That’s why for true 1:1 macro photos, I recommend using a tripod (or other sturdy base on which to place the camera). Not to say I haven’t taken 1:1 macro photos handheld… I have… with my 100mm L and often get good results.
Yes, I’m still waiting for a new Canon 50 – 55mm prime, with great optics, USM and IS…. Please pretty please.
Anyway… hope you’ll do well in your decision of what macro lens to get, and enjoy taking photos!