KENKO ADVICE MC7 AFX2 DG TELEPLUS

hi i have the opportunity to buy kenko teleplus mc7 afx2 dg what i am asking will this be ok for my 100-300mm 1:4.5-5.6 on my 20d any advice would be helpfull

If its a 2* tele you will loose autofocus and add 2 stops to the max aperture, which makes it manual focus at f11-very dark,difficult to focus and needs lots of light

thanks troutfisher for your reply i also herd that u can put tape on the contacts or is this for a newer type of kenko i dont no much about the kenko models i just use exstension tubes i have the opportunity to buy the mc7 dg for fifty guid is it worth me getting it or what lens would this be ok thanks in advance

What happened to your caps and punctuation keys?

sorry not the worlds best speller lol

mac66 wrote in post #9023226
thanks troutfisher for your reply i also herd that u can put tape on the contacts or is this for a newer type of kenko i dont no much about the kenko models i just use exstension tubes i have the opportunity to buy the mc7 dg for fifty guid is it worth me getting it or what lens would this be ok thanks in advance

Personally I would save the £50,if taping the contacts works you may get AF in very good light and that is a big question, the lens will hunt to find focus,possibly damage the motor,and more importantly you will still loose two stops and will degrade the image quality

Regardless of taping the contacts, you will still end up with a 600mm f11. So on a crop body you are going to need a minimum of 1/1000 shutter speed to handhold it. At F11, that may be hard even in good light.