[bo law tau]

long time ago , i heard canon focus still bad...is it??

some people said even use Canon len , still happened " back focus"...
if i use tamron len . will more bad??

[hanny]

you heard that the back focus right:>
but did you happen back focus ??

[man1492]

Yup. Canon AF on beginner DSLR is not as good as that of the nikon.

[Natel]

My friend using Canon 30D also encountered "back focus" with Canon lens .. so it may not apply only to beginner DSLR.

[super_ming]

Which lens did he use?

[Natel]

As remembered, it is "Canon EF 24-70mm f2.8L USM" or "Canon EF-S 17- 55mm f2.8 IS USM"

[edlis]

點解我用350D加埋十幾支新新舊舊canon鏡都冇支走焦.我真係好彩lA.
聽日六千八百萬都係我中架LA.

[hanny]

Natel did you try his 30d with the problem lens ?

beacsue this is not the problem of which canon model with which lens of back focus this is also the problem of user
so i think you better try it your seft to prove it

becasue may be not back focus may be the picture is soft you feel that is back focus :>

if really back focus better check with the canon sevice centre
<becasue of the machine problem>

[bean290]

if lens or body is still under warranty, u can take back to canon for fine tune. my 20D with 70-200 F4 and 17-40 F4 back focus problem is now fixed. 10-22 and 50 1.4 after check is fine no need to tune.
I think it is some fine adjustment problem.

[beancurdbean]

多數聽到中招, 都係17-40L, 24-70L, 70-200L

[mochida]

"多數聽到中招, 都係17-40L, 24-70L, 70-200L ".

我聽過70-200L係70果時會走，zoom前少少就ok，係咪真係其事？