EF Extender 1.4x III

It is what it is and if use properly is a wonderful item

Image quality is excellent but auto focus could be better

Auto focus was not brilliant

Good bit of kit that does what it says

Nothing about product but maybe price could be bit less.

Makes taking pictures easier

Nothing

Easy to use.

Price is high for 1.4 converter

ok with my 100 to 400 lens

a lot of money for what it is

Not much really

A bit of a nuisance to keep putting in on - and then you have to focus manually, which resulted quite often in poor quality photos!

Small light weight carry it all the time. Build is second to none as you'd expect from canon. Image quality is good on a 100-400mm L lens , but don't expect top quality at full 960mm hand held. Use a tripod/monopole and things improve.

None.

no good points if it doesn't work with my set up

Yes. it doesn't work despite may Canon agents stating it does.

Bought to extend the range and give a bit more flexibility without having to carry extra lenses.

Auto-focus does not work on my Canon 6D & Canon EF 100-400mm f4.5-5.6L IS II USM combination which was disappointing.