The lens has good close-up capabilities which deliver sharp result and a pleasant bokeh despite the not-so-fast aperture. On the 12mm, ghosting flare mostly takes the form of blue and green orbs whereas on the 12-40mm, you might come across larger multi-coloured orbs. It is perfectly acceptable to capture the image all in one frame, its just that on a M43 sensor there may be a lot more noise than you would normally see.

Olympus 12mm f2 vs Micro Four Thirds Lens Comparison: Olympus 12mm f2 vs

Although we don’t know the magnification at 12mm, you can see from the examples below that it is higher than the prime lens. Both lenses are resistant to flare thanks to Olympus’ ZERO coating but in our experience, the 12-40mm is somewhat more vulnerable than the 12mm.Incorporating an inner focus drive system and a stepping motor, the Leica 12mm offers quick and silent autofocusing regardless of whether you use it on one of the latest Micro Four Thirds bodies like the Panasonic Lumix GH5 or an older model like the Olympus OM-D E-M1. And for everyone who already has the silver edition of the Olympus 12 mm f/2 or is planning to purchase one. As we mentioned in the design section, a lens hood is available for both lenses and having one can reduce the severity of flare in your images.

Olympus 12mm f/2 ED M.Zuiko Digital Review

That's a bit disappointing for a premium fixed-focal lens, although as seen above the automatic correction works well.If someone put a gun to my head and made me choose one, I think I would actually the give honors to the Panasonic if both were being shot at f/2.