Any rumors on the horizon about an m43 lens longer than 400mm?

Started 6 days ago | Discussions thread
Brandon birder Veteran Member • Posts: 4,502
Re: Do??

Danielvr wrote:

It looks like Fuji is working on DO primes lenses so m43 will need to do the same.

You're using the phrase like everybody knows it.

What does DO mean and why do we need it?

DO stands for Diffractive optics. It is a Canon propriatry system.

Nikon's equivalent system is called PF short for Phase fresnel.

Both systems use some form of fresnel lens to bend the light more than a heavier glass lens, hence the shorter length.

Nikon's 400mm f4PF lens is a miniature marvel for APSC or full frame, but has strange bokeh effects in some situations.

 Brandon birder's gear list:Brandon birder's gear list
Olympus E-M1 III Olympus M.Zuiko Digital ED 60mm F2.8 Macro Olympus 12-100mm F4.0
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