09-21-2017 03:34 AM - edited 09-21-2017 03:37 AM
I understand that this topic has been rehashed to death but my issue is a bit different. Camera is a Cannon 7D. I picked up a lens from a good friend fellow photographer that other than the camera body all my current lenses were his first lenses. Right now I just picked up a EF 28-135mm f/3.5-5.6 IS USM from him, to give me a decent mid range lens for my bag. At first I thought it was just an issue past 70 mm where it would just continue to hunt for focus. Even in One Shot, Center spot focus it will just sit there and twitch between infinity and 50 feet on the dial. At full zoom it will sit and bounce in the infinity range never actually locking on to focus. If I touch the focus ring and move it, or nudge it it will sometime lock but it will be far from focused.
I set up my big tripod, white sheet backdrop and a solid object (Clay Frog) non reflective about 10 feet away. I lit it with a lamp. I set the lens on it's minimum zoom, camera is in P mode. I turn on live view and using the zoom on live view get as close to the object as I can get zoom wise via the live view. Lens is still at 28mm. I hit the shutter half way and zip zip beep. About a 1/8 of a turn out of focus. I swap to my 18-55 and zip zip in focus. So it's definitely a lens issue, even my Tamron 70-300 focused sharp at all points. Swap back to the 28-135 and it won't focus. I can put it in manual and get a super sharp image and a beautiful picture.
I have reset the camera a few times as originally something I changed left the stabilizer on all the time. So the camera other than my custom settings for the C Modes have been reset.
I have carefully blown out the inside the best I can of the lens with a bulb, and have verified the front lens is not crooked.
Friend has offered me a full refund for the lens but it's a 2 hour plus round trip again to get it back to him. Am I missing something or unbeknownst to him since the lens sat a few years sadly without a rear cover on did something happen internal and it's not worth the hassle to have it fixed? I paid $80 for the lens which I thought was fair as most are going $100-120 on eBay right now. I have a gig Saturday I guess I'll be shooting in manual focus now. Be taking 1000+ photos and auto would be really nice.
Solved! Go to Solution.
09-21-2017 07:25 AM
If your other lenses don't have that issue, yes it is a lens issue.
After you return it, look at the EF-S 18-135 IS STM, it has superior image quality, and is a more suited to the APS-C 7D.
09-21-2017 09:09 AM
For the second time this week, that sounds like a lens that has been waterlogged. That would explain why it was left opened up for a long time. The 28-135 was a very good lens in its day, but this one may not be worth the time and cost of a reclamation attempt.
But before you give up, have you at least tried autofocus microadjustment? Unlike many cameras on which that lens might be used, yours does have it. So you might as well give it a try.
09-21-2017 09:54 AM
The Canon EF 28-135mm f/3.5-5.6 IS USM Lens was/is one of my favorite lenses. Especially at its price point. It is really at its best on a FF camera so it may not be the best choice for a 7D. But it will certainly provide nice photos. As good or better than any other similar moderately priced zoom.
It isn't worth fixing and I believe yours is done.
09-21-2017 10:21 AM
If you've determined that it is, indeed in need of repair (and it's water damage) , you might want to get in touch with our US-based Sales Team to talk about the Canon Upgrade Program (formerly the Canon Loyalty Program). They'll go over options to trade your malfunctioning lens for a discount on a new or refurbished model with a one-year warranty! They're at 1-866-443-8002 from 8am to Midnight (ET) daily!
On the other hand, if you want to talk to tech support to go over your options for repair (if it's not water damage), you're welcome to do that, too. Our team is right here in the USA and they're friendly and experts at photography and troubleshooting. They're at 1-800-OK-CANON (800-652-2666) from 8am to Midnight (ET) weekdays or 10am to 8pm (ET) on Saturdays.
If you're out of the USA, you'll want to discuss your options with Canon in your area by clicking HERE.
09-21-2017 01:36 PM
09-21-2017 01:51 PM
Hey there Iggythetiggy!
If you need it calibrated, feel free to send it in! We still repair this beautiful lens! You have the option to send it by itself and we'll do a calibration with a "bench" body - a camera that's precision calibrated and should allow your lens to work with any Canon camera.
The other option (and the one we usually recommend) is to send both your lens and your camera body. Our technicians will first calibrate your lens on our precision "bench" body and then put it on your camera to see if it works like it should. If it doesn't, they'll refine the adjustments to make sure it works the way it should on your camera specifically.
Before any work is done, our Factory Service Center team will give you a free estimate, and you're under zero obligation to have any work done.
You can setup a repair on our site HERE, or again, if you prefer to speak with a specialist, you're welcome to give them a call at 1-800-OK-CANON (800-652-2666).
09-21-2017 01:52 PM
09-21-2017 01:55 PM
09-21-2017 01:57 PM
I might consider sending both in I would like the camera itself looked over anyway there is some unreachable dust I can see in the viewfinder that doesn't effect pics but could be professionally cleaned. I just don't have the income to dump $3-400 or more into it right now.
A Canon cleaning will probably make your 7D look like new.