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Old 24th August 2018
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Re: New Olympus Patent: 400mm f4.0 MFT Lens

Originally Posted by Tordan58 View Post
That lens would be fitted with an 89mm front lens. It would still be portable, although heavier than the Panasonic 100-400. How much is depending on the optical design and selection of material.

It would however cannibalize on the 300/F4 (+MC14) having more or less same the same speed at 300mm.
I am not sure about that. These long zooms lose max aperture values fairly quickly in the first part of zooming and so a 150-400mm f4-5.6 might be closer to f5 at 300mm.

Theoretically if Olympus made the 150-400mm as a f4.5 to 5.6 or even f4.5 to 6.3, will its portability increase? f6.3 at 400mm is not bad at all.
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