f/1.2 Lens Size Locked

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dwkyre Regular Member • Posts: 132
f/1.2 Lens Size

Bear with me, this isn't a complaint. More of a curiosity that came up when I was pondering lenses in the system.

Why are the Micro 4/3 lenses with wide apertures so big? For instance, the Olympus 25mm f/1.2 is much larger than the Canon 50mm f1.8, despite the Canon having a larger physical maximum aperture. Is there something intrinsic about the ratio that requires a larger lens, regardless of the actual aperture size?

Or maybe it has nothing to do with aperture size? Maybe it is just that an f/1.2 lens is also going to have other features (build quality, weather sealing, optical qualities) that increase size?

Anyone have any thoughts?

 dwkyre's gear list:dwkyre's gear list
Panasonic Lumix DMC-GM5 Panasonic G85 Panasonic Lumix G Vario 45-150mm F4-5.6 ASPH Mega OIS Panasonic Lumix G Vario HD 12-32mm F3.5-5.6 Mega OIS Olympus M.Zuiko Digital 25mm F1.8 +3 more
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