canon 24-70

kwaichi

I just brought the Canon 24-70 a couple weeks ago and noticed it's not focusing right. Should I send it back to where I brought it or I have to send it to Canon to get it check? Advice please....

Thanks,
EDward

kdog

My first choice would be to send it back to where you bought it from, if it's still within their allowed return time. Otherwise, send it into Canon repair.

NeilL

3 points:

- this lens is only at its best on a ff body

- this lens has a lot of controversy attached to it for focusing issues, so your copy is par for the course

- if possible, put the lens on some other bodies, and especially on one where you can do microadjustments and just see what's what.

Don't be shy about asserting your right to a properly focusing lens, especially when it's a L.

Neil

kwaichi

Thanks guys. I am gonna take it to check with my friends 1Ds MKIII later on today to see if it still has the focus issues.

JimKarczewski

Honestly, good luck. 24-70 can be a cursed lens. Problem with sending it back to Canon is they will check to see if it's in spec. In spec may not work perfectly with your body. You can have the lens calibrated to your body by a skillled technician. The only one that I know that receives praise from NUMEROUS top photographers is a guy named Toshio on the east coast. I don't know his complete background, but he is like the end all when it comes to making Canon stuff work right (canon seems to have a half-a$$ attitude towards things it seems unless you are some major working pro that shoots with their gear, or so it seems. They've been good to me so far, but I send everything to CPS.)

All the pros over at the Digital Wedding Forum (subscription wedding photog site) swear by his services when numerous trips to Canon have failed people. Just a thought..

His contact info:


T F Camera Repair
27 Brunswick Woods Drive
East Brunswick, NJ 08816-5601
Phone: (732) 238-8806


FYI, Rumors have had it for quite a while Canon is going to replace the 24-70 with either a II model or IS model. But I've seen that rumor for quite some time now.

kdog

JimKarczewski wrote: »

Honestly, good luck. 24-70 can be a cursed lens. Problem with sending it back to Canon is they will check to see if it's in spec. In spec may not work perfectly with your body. You can have the lens calibrated to your body by a skillled technician.

Or just calibrate it yourself using the lens calibration feature on any of the newer Canon DSLR bodies, like the 7D, 5DMKII, etc.

JimKarczewski

kdog wrote: »

Or just calibrate it yourself using the lens calibration feature on any of the newer Canon DSLR bodies, like the 7D, 5DMKII, etc.

Uh.. No.

The MicroAdjust is great, but a lens can be well out of the range of the MicroAdjust's ability. That also only accounts for a lens that is completely parallel to the sensor. If an element slipped and isn't parallel, it will never work. It's a great concept, but if a lens is that far off a +/- 20 adjustment isn't going to do any good.

kdog

JimKarczewski wrote: »

Uh.. No.

The MicroAdjust is great, but a lens can be well out of the range of the MicroAdjust's ability. That also only accounts for a lens that is completely parallel to the sensor. If an element slipped and isn't parallel, it will never work. It's a great concept, but if a lens is that far off a +/- 20 adjustment isn't going to do any good.

If a lens isn't parallel to the sensor, or is out more than +/- 20, then it's broken. I don't believe Canon is going to call a lens like that "in spec".

JimKarczewski

kdog wrote: »

If a lens isn't parallel to the sensor, or is out more than +/- 20, then it's broken. I don't believe Canon is going to call a lens like that "in spec".

Too bad we don't know what Canon's specs are.