JuzaPhoto uses technical cookies and third-part cookies to provide the service and to make possible login, choice of background color and other settings (click here for more info).
By continuing to browse the site you confirm that you have read your options regarding cookies and that you have read and accepted the Terms of service and Privacy.
You can change in every moment your cookies preferences from the page Cookie Preferences, that can be reached from every page of the website with the link that you find at the bottom of the page; you can also set your preferences directly here
Hello All I just picked up a new 100-400 ISII Lens & *2 III Converter and the Auto Focus did work. But not it dont. I cant believe this is not working, i took it back and was told that they are not compatible and Auto Focus does not work... I need to decide if i upgrade body firmware (reluctant to do this) or stick with auto focus or return it.
Is this right, is auto focus disabled, is there anything that can be done? Thanks Charlie
The 100-400mm IS II is not compatible with the 2x converter, only the 1.4x converter. You will not get AF with the 2x converter attached, but you can still use MF. I use the 1.4x Canon III with my 100-400 IS II on a 5D3 with great results. If you need further reach you will need to look for a faster lens like the 500mm f4 , 300mm 2.8 or similar. Not sure what body you use, but the crop bodies like a 7D MKII will give you 400x1.4x1.6 = 896mm with that lens. I would think this is plenty.
The 100-400 at 400 has a f/5.6 aperture, with the 2x it becomes f/11... no Canon camera can focus at f/11, not even the 1 series camera (the limit for the 1DX is f/8).
Other than, I don't recommend a 2x teleconverter on a zoom lens, you need a super sharp prime lens to get the best results from a 2x.
What do you think about this topic?
Do you want to tell your opinion? You can join the discussion by joining JuzaPhoto, it is easy and free!
There is more: by registering you can create your personal page, publish photos, receive comments and you can use all the features of JuzaPhoto. With more than 242000 members, there is space for everyone, from the beginner to the professional.
JuzaPhoto contains affiliate links from Amazon and Ebay and JuzaPhoto earn a commission in case of purchase through affiliate links.
