is there any way to use the Extenders with this lens

i had the
Canon EF 70-300mm f4-5.6L IS USM
and i want to use the :
Extender EF 1.4X III
Extender EF 2x III
and i think Canon web site didnt put this lens with the manual for these Extenders
is there any way to use any other Extenders with this lens ?

and thanks

You cannot use the Canon extenders but the less expensive Kenko extenders will work.

krb wrote in post #12777032
You cannot use the Canon extenders but the less expensive Kenko extenders will work.

thank you so much
but i think that i saw some topics about these Kenko extenders
they use them for macro setup only

sorry my mind goes to the Kenko tubes

Tamron, Kenko, Sigma extenders should all work.

GregoryF wrote in post #12777143
Tamron, Kenko, Sigma extenders should all work.

thank you so much

This one will work well

http://www.adorama.com …OSDGX.html#Prod​uctReviews

shoturtle wrote in post #12777161
This one will work well

http://www.adorama.com …OSDGX.html#Prod​uctReviews

thank you so much

GregoryF wrote in post #12777143
Tamron, Kenko, Sigma extenders should all work.

Sigma 2x WILL NOT work
it has the bit extending into the back of the lens like the Canon ones

(although it is a slightly different diameter than the canon one, a Canon 1.4 wouldnt fit my Sigma 70-200 f2.8, but the Sigma 2x was fine)

Echo63 wrote in post #12777466
Sigma 2x WILL NOT work
it has the bit extending into the back of the lens like the Canon ones

(although it is a slightly different diameter than the canon one, a Canon 1.4 wouldnt fit my Sigma 70-200 f2.8, but the Sigma 2x was fine)

thanks

i saw it now at the amazon site
http://www.amazon.com …non-Digital/dp/B002C6QC3E

the kenko will work
but if i bought it for my zoom
shall i reach the length like the zoom :
Canon EF 100-400mm f4.5-5.6L IS USM

Don't forget to read the teleconverter sticky topic:
https://photography-on-the.net/forum/showthre​ad.php?t=41922

Unless you have a 1D(s) body, you will by default loose AF when adding a teleconverter to a lens with biggest aperture of 5.6.
Also, chances are that the lens is not super sharp at 300mm, if you add a teleconverter the softness is exagerated.
I would be hesitant to spending money on a teleconverter for this lens.

MPCman wrote in post #12777527
Don't forget to read the teleconverter sticky topic:
https://photography-on-the.net/forum/showthre​ad.php?t=41922

Unless you have a 1D(s) body, you will by default loose AF when adding a teleconverter to a lens with biggest aperture of 5.6.
Also, chances are that the lens is not super sharp at 300mm, if you add a teleconverter the softness is exagerated.
I would be hesitant to spending money on a teleconverter for this lens.

thank you so much for all the information

by the way
this lens is too sharp on my 5D Mark II even in low light inside the house
but when i use it on the canon 60D i feel im loosin a little bit of sharpin
so i will do with yr advice

moltengold wrote in post #12777690
by the way
this lens is too sharp on my 5D Mark II even in low light inside the house
but when i use it on the canon 60D i feel im loosin a little bit of sharpin
so i will do with yr advice

The 60D have smaller pixels in the sensor, so while only capturing the center part of the lens because of the smaller sensor, it will put a higher demand on the lens for this portion than the 5D2.

I suggest you consider the below:


http://www.bhphotovide​o.com …TelePlus_MC4_AF​_1_4X.html

Test results:

http://www.traumfliege​r.de …elekonverter/ov​erview.php

Regards,