Olympus introduced one new mFT zoom lens at the same time with E-M1. It is a mFT lens and the first lens in the new M.Zuiko PRO category: the M.Zuiko 12-40mm f/2.8 PRO. This lens is weatherproofed to the same standard as E-M1, and all in all it is in the same class as Super High Grade FT lenses. Especially Olympus says that this nanocoated lens is better than the highly regarded Zuiko Digital 12-60mm F:2.8-4.
The new lens has similar manual focus clutch mechanism as M.Zuiko 12mm an 17mm lenses. Other main features are nanocoating, semi-macro with closest focusing distance of 20 cm (0.63X at longest focal length) and a configurable function button (L-Fn). This time also lens hood is included.
Sadly this interesting lens was not yet available for test.
Olympus also announced one telezoom lens for M.Zuiko PRO lineup: the M.Zuiko 40-150mm f/2.8 PRO. It will be built to the same standards and will be available during next year. No further information is available yet.
Also Olympus is working on the next two lenses of M. Zuiko PRO category. They are a wide-angle zoom lens and a super telephoto lens. Focal lengths and availability are not announced yet.
For E-M1 there are now 65 lenses (FT and mFT series) available from Olympus, Panasonic, Voigtländer, Sigma and other manufacturers. That´s quite a lot if you compare to Nikon who has 79 lenses in their system and they are not all compatible with every Nikon body. Of course there are also lenses from Sigma, Zeiss and others for Nikon. I am not writing this to actually compare these systems but was just thinking how 65 lenses is already an impressive number when compared to what there is available for any system camera.
Olympus divides its own mFT lenses now into three categories:
M.Zuiko PRO, which starts now with these mentioned lenses
M.Zuiko Premium: ED 12mm f/2, 17mm f/1.8, 45mm f/1.8, ED 60mm f/2.8 Macro and ED 75mm f/1.8 (Of these 75mm lens would optically be a PRO class lens but it is not dust and splash proof)
M. Zuiko: all the rest
Comparisons between M.Zuiko ED 12-40mm f/2.8 PRO (mFT) and Zuiko D. ED 12-60mm f/2.8-4 SWD (FT)
Above lens designs. Illustrations are not in same scale, 12-60 is larger than 12-40. Lens designs are quite similar in principe.
These MTF charts are by Olympus. Absolute numbers are not important here, just look at releative levels. Charts are formed similarly and are thus comparable between each other.
Blue or 20 lines/mm curves tell about contrast which is more important visually. Orange or 60 lines/mm curves tell about maximum resolution. S is for sagittal and means performance in lines which point towards the center of image. M is for meridional and means performance in tangential lines which are at right angles against sagittal lines.
Note: There´s more chart beyond 10mm from center in 12-40mm chart. Compare at same distances.
Note 2: It says 14mm as wider focal length for 12-40mm lens. This is a mistake and actually is 12mm.