Oly 150-400 lens size

Started 1 month ago | Discussions thread
whumber Veteran Member • Posts: 3,228
Re: Oly 150-400 lens size

drj3 wrote:

It is probably 318.54mm long assuming LTL refers to the lens length. - The first patent below.

However, what I really wanted them to make, which will probably no longer happen, is one of the 2nd or 3rd patents below.

Lens Data for a 150-400 F4.5

F 152.71 239.55 391.26
FNO. 4.57 4.57 4.57
2Omega 8.08 5.14 3.15
BF (In Air) 29.01 29.01 29.01
LTL (In Air) 318.54 318.54 318.54

Something like 310-320mm is what you get if you make some measurements from the available shots of the lens mounted on the E-M1X using the hotshoe as a known length. 318mm seems consistent with the low end of that estimate plus the distance to the sensor plane.

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Fujifilm X-T1 Olympus OM-D E-M1X Olympus E-M1 III Olympus M.Zuiko Digital ED 60mm F2.8 Macro Olympus M.Zuiko Digital ED 75mm F1.8 +9 more
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