7D Mk II and 2x extenders

KeithR — Sun, 16 Nov 2014 14:48:25 GMT

Initially just canvassing opinion/"putting it out there..."

So far I've been delighted with my 7D Mk II - it improves over my 7D and 70D in every area that matters to me.

Except...

Whereas those cameras both work perfectly well with my Sigma 120-300mm f/2.8 and 70-200mm f/2.8 lenses attached and a 2x TC (Sigma or Canon Mk II) between them, my 7D mk II over-exposes by almost two stops with the same lens/TC combos.

Every time.

In any exposure mode.

1.4x TCs from Canon, Sigma and Kenko work perfectly with the 7D Mk II and the SIgma lenses; but with either 2x, exposure is all to hell.

I can get round this easily enough by dialing in -1.75 EC, but it seems clear enough that this is something that needs to be addressed - presumably via a firmware update.

Anyone else?

Re: 7D Mk II and 2x extenders

KingEyre — Sun, 16 Nov 2014 21:31:58 GMT

Just tried my 70-200 2.8 mk2 and 2x extender (Canon) mk3 and no problem, exposure fine.

George.

Oops, just seen you are using a Siggy 70-200, so my reply may not be totally relevant..

Re: 7D Mk II and 2x extenders

KeithR — Mon, 17 Nov 2014 06:43:44 GMT

No, it's helpful, George - it points at the Sigmas as being the issue.

topic Re: 7D Mk II and 2x extenders in EOS DSLR & Mirrorless Cameras

7D Mk II and 2x extenders

Re: 7D Mk II and 2x extenders

Re: 7D Mk II and 2x extenders