Yep I finally redid the test! This time using an angled setup so that even if the focus was off (the floorboards they move!) the shot would still be able to show the full area in focus for detailed comparison. This is a test done between the Canon MPE65mm macro, Sigma 150mm macro and the Sigma 70mm macro. Results from the test can be found here: Triple Macro lens test - a set on Flickr Thoughts on the results: Sigma 150mm macro: wide open at f2.8 is clearly not it sharpest, but that is common for many lenses; stopped down to f4 and things make a dramatic improvement. From f4 through to f8 things appear quite solid, then there is a slight degradation around f10, but the real drop starts to occur at f13 where things take a far more noticeable dip in overall sharpness. Sigma 70mm macro: starting to understand where this lens gets its title as one of sigma's sharpest, even wide open at f2.8 it gives impressive results. Stopped down to f4 and things become even sharper still. Rather like the 150mm from f4 through to f10 the performance is very similar, however between f10 and f13 there is again a noticeable drop in overall performance of the lens sharpness. Canon 65mm macro: wide open at f2.8 we start to see why this lens is a pure macro only, sharpness at this aperture is far ahead of the other two and would be more comparable to their performances when stopped down to around f4. Again we see the same pattern as with the other glass, prime optimal performance before f10, slight degradation at f10 followed by a little more loss at f13. Overall views: f2.8 - wide open - the 65mm is clearly standing out as the strongest here and is far ahead of the other regular macro lenses. f4-f10 - quite similar overall performance from each of the lenses in this range. Peek optimal performance, followed by a slight dip at f10. f10 performance overall seems quite stable, though the 70mm appears a little sharper, though the flash angle and contrast increase as a result might be affecting this result. f13 - The 70mm and 65mm appear to be leading the way at this setting, with the 150mm dropping a little behind (though again I repeat that contrast differences might be giving a slight bias toward the 70mm over the 150mm in this respect). Overall - the MPE65mm is clearly standing up as the best overall macro performer, from wide open through to even closed down to f13. It really goes to show the level of performance that can come from a purely macro dedicated lens, I just wish (again) that it could get down to 1:2 macro it would then be an easy lens to sit with all day for a day spent doing macro work. Coming next the Sigma 70mm is earning its name as one of sigma's best performers and just manages to beat the 150mm optically speaking when at the more extreme ends of its aperture range. In the middle areas performance is very similar. And finally the 150mm - the longest focal range by more than double that of the other two, but whilst its not standing quite as high its performance, even down to f13 is still very impressive and certainly usable. I remind readers that this test is done with no sharpening applied to any of the shots so this is a pure test of the lenses performance rather than showing any differences in sharpening amounts. Further there might be some bias toward the 70mm in the latter test areas because of the angle/power of the flash and the slight contrast increase these shots appear to have over those produced from the 150mm.