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

Quote:
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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