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View Full Version : Metabones EF->mFT v2.8 update


DanC.Licks
27th June 2017, 06:00 PM
Finally, one that works on the E-M1 Mark II with the Canon 400/5.6. Actually, that is not quite accurate because v2.6 also worked, but 2.7 and 2.7b had problems recognizing TCs and then having the settings not revert back to normal after taking the TC off. So v2.8 has those issues worked out, and seems to be running smoothly. Only thing is the EXIF shows 566mm in stead of 560mm with the 1.4x TC attached... I can live with that;)

Bengeo
27th June 2017, 06:09 PM
How is continuous autofocus? Any change in performance when adding TC?

DanC.Licks
27th June 2017, 06:20 PM
C-AF is useless with the Metabones/Canon 400/5.6, with or without a TC. How it is on other Canon lenses I do not know, but my impression is it is simply asking too much.

DanC.Licks
3rd July 2017, 09:31 AM
Back to v2.6. Still not recognizing the TC properly. Only registers if I push the lens release button with the camera turned on. Camera off and back on, same thing.
:confused:

Tordan58
23rd July 2017, 03:28 PM
When attaching the extender the version 2.8 of the dapter reports the focal length correctly on my camera.

DanC.Licks
23rd July 2017, 06:30 PM
Which extender, Mark II or Mark III?

Tordan58
23rd July 2017, 06:39 PM
I have the Mark 2

conurus
25th July 2017, 04:49 PM
Finally, one that works on the E-M1 Mark II with the Canon 400/5.6. Actually, that is not quite accurate because v2.6 also worked, but 2.7 and 2.7b had problems recognizing TCs and then having the settings not revert back to normal after taking the TC off. So v2.8 has those issues worked out, and seems to be running smoothly. Only thing is the EXIF shows 566mm in stead of 560mm with the 1.4x TC attached... I can live with that;)

It is taking the multiplier as root 2 (1.414). If the teleconverter is exactly 1.4x, which is entirely plausible, the light loss is not exactly one stop, but a tiny little bit less. We do not know the exact multiplier of the teleconverter, but it can't be exactly 1.4x and exactly one-stop light loss at the same time.