Does CSC clean the lens for free?

[Shin Howard]

Dear fellow CSers,

I recently sent in one of my prime for calibration as it does seems to focus correctly, after I collected it. I notice there are many small specs of dust in it.
(Much more than what I have sent it, as the lens is practically new.)

I tried taking some pics but seems like it doesn't affect the pics.
Are they able to clean it free for me since it's under warranty?

[rendition]

Call them up and ask lor - more accurate answer since you claimed it could be them who introduced it.

[iMac08]

man,you are not alone.i send in my lens clean.after calibrate one of them got a bit more dust.they claim never open up and is just electronic calibration.

And yeah.does not affect image quality.but you can dream on abt free cleaning.they told me for L-180,non L-100.

[gazkw]

im not saying you guys are wrong, but it could be a matter of perceptiveness.

you probably didnt pay as much attention to checking as compared to when you just got it back from a service centre and wanting to check for problems.

[iMac08]

nope.i checked every damn thing on e spot before leaving.point is they won't clean free for you.

[cancan7]

One of the staff at CSC cleaned the dust in my 17-55 FOC when I was there to clean my camera's sensor. It was spotless, but it wasn't long before dust got inside again...

[Shin Howard]

Originally Posted by gazkw im not saying you guys are wrong, but it could be a matter of perceptiveness. you probably didnt pay as much attention to checking as compared to when you just got it back from a service centre and wanting to check for problems.

I actually checked it before I sent it in, and checked it again after servicing.
The dust probably went in during calibration.

[rockmastez]

Y not take a picture before u send.. print 2 copies with a statement showing before cleaning
& ask them to sign before u leave. Give them 1 copy n u keep the other 1.

[Shin Howard]

Originally Posted by iMac08 man,you are not alone.i send in my lens clean.after calibrate one of them got a bit more dust.they claim never open up and is just electronic calibration. And yeah.does not affect image quality.but you can dream on abt free cleaning.they told me for L-180,non L-100.

Yep, I sent in my lens for calibration due to rear focusing issues.
They did an electronic adjustment as mentioned.

I called back and they told me to bring it down, if got dust then they'll clean it for free.
While they also advise me that if they clean it, they need to disassemble the whole lens then re-align and recalibrate the whole thing again. So I'm going down to see what they can do.

[chalib]

Originally Posted by Shin Howard While they also advise me that if they clean it, they need to disassemble the whole lens then re-align and recalibrate the whole thing again. So I'm going down to see what they can do.

Hmmm... free cleaning with consequences

[iMac08]

yeah i think so too. i think if pic not affected...better not do that....diassmble and connect again.i remember someone mentioned before after that.there is no guarantee it will be better either cause they don't do it in a clean room.

unless picture quality becomes damn bad... anyway over time all lens collect some amt of dust.rather enjoy the shooting then to whole day worry abt the lens condition..use also don't use in peace...

[Shin Howard]

Originally Posted by iMac08 yeah i think so too. i think if pic not affected...better not do that....diassmble and connect again.i remember someone mentioned before after that.there is no guarantee it will be better either cause they don't do it in a clean room. unless picture quality becomes damn bad... anyway over time all lens collect some amt of dust.rather enjoy the shooting then to whole day worry abt the lens condition..use also don't use in peace...

Agree with that, haha guess I just look at my pics and forget abt the dust.

[Old Boy]

After I re-calibrated the camera due to back focus, dot stains start appearing every now and then. I am very certain that the camera do not have this issue before the repair. Got worse over last weekend, saw so many dots and "bloopers" in the pics. No choice got to pay for cleaning services which they charged around S$21.40 though still under warranty. I am one who rather bring another camera body with lens attached than to change lens in unfavorable condition. Just wondering if these dots are actually oil stains, esp after using auto cleaning sensor, the dot shape turn to "blooper" form.

[gazkw]

calibrate the camera?

isn't it calibrating the lens to the camera, and not the other way around?

technically calibration is done electronically. to do it physically is too time consuming.

is your camera the 1DIII? cos there is a known issue...

[iMac08]

that's cheap for cleaning...is not an L right?

sounds real bad..if is their fault..why shld u pay for the poor svc?i mean to me that bit is fine and i get more accurate focus and most impt...no quality dropped i the image.

[Old Boy]

Originally Posted by gazkw calibrate the camera? isn't it calibrating the lens to the camera, and not the other way around? technically calibration is done electronically. to do it physically is too time consuming. is your camera the 1DIII? cos there is a known issue...

I found out about the back focus issue when using 70-300 lens with 40D. The other lens also give the same problem on this camera. I sent both 70-300 & 40D for calibration and do not have the issue with it anymore. Neither does the fault shows up in other lenses. Not sure which was adjusted. If lens was to be calibrated, won't it be affected if used in other camera bodies ? Now you have given me some homework to do.. nope I don't think I see this issue on the other 2 bodies I have with the lens I submitted. Pardon me for my ignorance.

[gazkw]

Originally Posted by Old Boy I found out about the back focus issue when using 70-300 lens with 40D. The other lens also give the same problem on this camera. I sent both 70-300 & 40D for calibration and do not have the issue with it anymore. Neither does the fault shows up in other lenses. Not sure which was adjusted. If lens was to be calibrated, won't it be affected if used in other camera bodies ? Now you have given me some homework to do.. nope I don't think I see this issue on the other 2 bodies I have with the lens I submitted. Pardon me for my ignorance.

tbh im also not 100% sure.

for sigma, im very sure the calibrate the lens to the body. cos the technician just writes the new focus data into the lens.

im pretty sure they would do the same thing at canon, although i have no personal experience. they would simply modify the data on the AF chip.