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Old 2nd December 2018
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Re: Olympus 150-400 Rumour

Originally Posted by Tordan58 View Post
If that turns true, the lens better be F/4 and not F/5.6.
The smart money is on f4.5! That's not as stupid as it sounds. The difference between f4 and f4.5 in terms of diameter of the front element is significant. 400mm f/4.5 would be a shade under 90mm, whilst f4 would likely be the wrong side of 100mm. Either way, you're looking at a very large optic.
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