For the price this goal is daunting and can demonstrate in terms of pique some more famous pebbles. I was astonished at the difference in cost with the 12mm f2, well it is simple it is made in china instead of made in japan for 12mm, also the body, even if there seems no , appears to be plastic. No problem, this is not seen in the photo. The 45mm 1.8 is terrible, essential for those who have a device M4 / 3 and love primes. No visor or cover ... damage. Mind the decorative ring end lens (CD-40), one can easily lose ... Finally, to complete "the Holy Trinity Olympus", ie the: - M.ZUIKO DIGITAL ED 12mm F2.0 - M.ZUIKO DIGITAL 45mm F1.8 - M.ZUIKO DIGITAL ED 75mm F1.8 So lacking in the friend Olympus, a 20 or 25 mm 1.8 in the same spirit, will have to go to the LUMIX G pana or 20mm F1.7 ASPH pancake is, it seems, a near-perfection.