Canon 100-400mm f/4.5-5.6 EF L IS USM cleaning the lens inside

[@lanep4322]

I have the same lens and didn't realize cleaning behind the front element could be within reach of a competent DIY'er. Thanks for sharing this very useful information.

[@CamerasLensesEtc]

Glad it was helpful!

[@xanthus798]

This is a very well done tutorial that many of us will use in the future. Clear and concise and done in virtually real time as well. Thank you!

[@frostybe3r]

Yeah it's a fantastic way to void your warranty.

[@CamerasLensesEtc]

If you have warranty on the item, why would you repair the lens by yourself?

[@Pautiwa]

Thanks for sharing this. It really makes a difference when deciding if buying such a lense and/or if taking it to be cleaned. Please keep these videos coming.

[@CamerasLensesEtc]

Thank you for your comment!

[@jezhowellphoto]

Thank you so much for this concise and well paced tutorial. I was able to get my old lens looking like new!

[@saadahmad5282]

Good job.great and easygoing to understanding.thanks

[@CamerasLensesEtc]

Thank you for your comment!

[@jg1bozpochi]

I was able to work with reference. Thank you very much.

[@CamerasLensesEtc]

You're welcome!

[@andredekock]

Very well done tutorial. Got my well loved lens up and running properly again. Thank you! These push and pull lenses just suck up so much dirt! Subscribed.

[@saadahmad5282]

I watched this video more than 10 times,it is very great and easygoing to learning.

[@CamerasLensesEtc]

Thank you for your comment, I'm glad that my video has helped you!

[@victoriabacharach9864]

Thanks you for a great tutorial. I’m having trouble getting the 3 flat head screws out any suggestions before I try a screw extractor and do you know what size screws they are? Thanks for you help.

[@CamerasLensesEtc]

I don't know which size they are. If you can't remove them, you might try to cut a groove into them, then use the screwdriver to remove them.

[@daman8827]

This was a very useful video, will come in very handy in the near future, well explained and easy to follow, look forward to your next one, have subscribed.

[@ZaneRobertFrost]

Thank you for this video. I successfully cleaned mine and repaired the lock ring.

[@CamerasLensesEtc]

I'm glad my video has helped.

[@shaftdrive7567]

Subscribed. Also, some advice for the lesser experienced: do place your screws/ little parts etc. in some kind of container so they don't roll away and get lost. Work on white surface. Glass baking tray with paper under is good. 😬🖤🤗

[@CamerasLensesEtc]

I place the parts and screws next to eachother on my table, so I know which part I should continue with when I'm assembling the lens. But in the future I'll make a video about it, and put it in the description.

[@larryfreestone6135]

Thank you. You just saved me over 200$. Best.

[@plasticpix5402]

Thankyou, this has helped me so much

[@huwjones9333]

Fantastic, thank you for a brilliant video. Going to clean mine now.

[@CamerasLensesEtc]

You're welcome!

[@rolandjacobsen6601]

Thank you for your video I can use it

[@CamerasLensesEtc]

I'm glad my video has helped!

[@ХудожникМаляр]

You have to use JIS 000 screwdriver instead of PH000. It's slightly different. I started with PH and almost broke screw, but then switch to J000 and everything went flawlessly.

[@CamerasLensesEtc]

Thank you for the tip, I'll buy and try the JIS screwdrivers.

[@shaftdrive7567]

Can't find any reference to JIS driver series, can you provide any definition, docu, link etc? Please.

[@brucehanover890]

Nicely done, easy to follow and understand. I have the 100-400 L ii and though I'm feeling comfortable as to how it's done, I believe I'll wait for your upcoming video, according to what's written, in about three more weeks. I hope it passes quickly! My lens is very dusty!

[@CamerasLensesEtc]

I just published the video about cleaning the Canon 100-400L IS USM II lens: kzbin.info/www/bejne/b5Okgq2eodyrmrM

[@brucehanover890]

@@CamerasLensesEtc Perfect! Thanks, I'll get at it!

[@fritsscholtenhzn6268]

Thx a lot. Good INFO!

[@guerrafabio]

sensacional!!!

[@CamerasLensesEtc]

Thank you for your comment!

[@shaftdrive7567]

Great video, thanks a lot. Hope to fix mine, which has mildew spots. Canon shop MUCH TOO expensive for non-pros to keep going to for cleanups.

[@CamerasLensesEtc]

Glad it helped!

[@johanchaves5726]

Hi and thank you for your awesome work. The first lens, that you hold on your hand on minute 10:20 can it be disassembled? Mine has fungus in it and there seems to be no way to separate it.

[@CamerasLensesEtc]

Generally, the answer is no, it can't be separated and put back together.

[@vilson.farias]

Thanks a lot, awesome video!

[@CamerasLensesEtc]

Thank you!

[@photoshackanu]

I have a 400 mm 2.8 that got wet so I have some moisture on the glass. can you tell me what I need to get it sorted?

[@CamerasLensesEtc]

If the moisture in on one of the lens elements inside the lens, then remove the front lens element, and wait until it dries. If the moisture is in the front lens element (maybe it is molded, and the moist is between the two parts) then wait a few days, and it will by dries... and hope that it doesn't leave any residue. Of course, keep the lens in a warm and dry place.

[@ronvangorph1440]

Hi, can this process be used to replace a scratched front lens, are there any special considerations in replacing the lens

[@CamerasLensesEtc]

Yes, you can replace the front lens element using this video, but I would recommend to calibrate the lens after the front lens element has been replaced.

[@ronvangorph1440]

Thank you for you reply. Sorry i am a amateur. Can i calibrate myself, unfortunately or fotunately we live on Norfolk Island, nearest camera repairers are 1500km away, which is why i am considering changing the lens element myself

[@ronvangorph1440]

Alternatively, i could take the lens and new front element to the mainland and have it replaced professionally. I was lucky to get the replacement from Canon for AUD$470.00, and have been quoted AUD$150.00 to have it replaced.

[@CamerasLensesEtc]

Calibration: you can twist the front lens element, and that way the distance from the other lenses changes, and that is how it can be calibrated. Check the sharpness of the lens at different settings, then choose the one which is the sharpest. Is the 150AUD replacement includes the professional calibration? Because the lens can be calibrated with twisting the front lens element, using the eccentric screws in the lens, and using calibration software (for calibrating the AF). If the 150AUD includes all of that calibration, then I would go with that one.

[@ronvangorph1440]

@@CamerasLensesEtc many thanks for your assistance, love your videos

[@thespyk]

Hi, do you know where I can get spares for this lens? Apparently the AF and IS module needs replacement and there is also fungus in between lens elements

[@CamerasLensesEtc]

Check ebay and aliexpress. However, it is quite old lens and I think it is not in production anymore, so consider yourself lucky if you find those parts for it. Alternatively, you can ask the Canon service center in your country, usually they sell repair parts for individuals.

[@thespyk]

@@CamerasLensesEtc i was afraid you'd say something like that. I got the lens cheap and dirty. The AF works(a little slow but it works), the IS seems fine but I'm shooting so fast I don't give the IS much time to work. Canon locally said they won't even open it. Thanks for the advice and the videos.

[@bhalchandrakapatkar1710]

No.1. 👍👌🙏🇮🇳

[@demuffin15]

I just attempted cleaning the inside of the lens and I touched the inner glass. Seems like it was the IS element as it was moving about. Will touching that glass cause the lens to be out of focus? I reassembled the lens accordingly and I could not get the lens to focus throughout the focal range.

[@CamerasLensesEtc]

If you pushed that lens element hard, and the lens element actually moved back, then yes, it could cause autofocusing problems. In the past I had this lens which second lens element should be cleaned, I used a cotton swab to clean it, and it did not caused any damage. If you place the lens upwards, and move the lens, the second lens element should move few millimeters around, it is hold at its position by springs.

[@demuffin15]

@@CamerasLensesEtc I see. I might have pushed it too hard. Is there any way to reposition the lens element?

[@CamerasLensesEtc]

@@demuffin15 Is the lens element moves in the socket (normally it wobbles if you shake the lens)?

[@demuffin15]

@@CamerasLensesEtc I managed to figure out what was wrong. Thank you for your help! Another question, do you know where I could find the 2 screws on the zoom tightening ring? The part number for the screw is YA2 0931. Thank you!

[@CamerasLensesEtc]

@@demuffin15 Generally, you can buy repair parts on ebay or aliexpress. I would search for "Canon 100-400mm screw", or "Canon screw", maybe the sellers don't put the part number in the ad. Alternatively, you can ask your local lens repair shop for spare parts, maybe they sell that.

[@juliehay9641]

Is there a way to verify that I have replaced the lens in the correct position? I'm second guessing i used the right marking to reassemble.

[@CamerasLensesEtc]

Do you mean lens elements or the eccentric collars of the screws?

[@samuelmelim]

Could you help me in order to clean the first element on a 200-600mm Sony G Lens?

[@CamerasLensesEtc]

I didn't have that lens, so I don't know how to do it.

[@GingerPhotographer]

Nice - Do you have a tutorial for the 100-400 ii?

[@CamerasLensesEtc]

No, I don't have.

[@michelterral5907]

you think the same can be done with a canon 100 400mm l is ii?@@CamerasLensesEtc

[@CamerasLensesEtc]

I have cleaned a 100-400L II since, and the video will be on my channel in about 1 month.

[@CamerasLensesEtc]

@@michelterral5907 The two lens are quite similar, actually it is easier to clean the mark II... I have the video, it will be on my channel in a month.

[@CamerasLensesEtc]

I just uploaded it!: kzbin.info/www/bejne/b5Okgq2eodyrmrM

[@luast7594]

Great video. But I can't stress enough. DONT START THIS, UNLESS YOU HAVE JIS SCREW DRIVERS.

[@CamerasLensesEtc]

Do you mean JIS by "JIH"? If yes, I tried that, and it made no difference to me, and you can use PH scewdrivers instead of JIS.

[@luast7594]

@CamerasLensesEtc Yes, I started with Phillips and stripped two of the three screws for the outer cover. Bought a set of JIS drivers and there was a clear difference in fit, also didn't strip anymore out. There is another comment, where the person states having the exact same issue.

[@dmsdms215]

I have both types of screwdrivers. Neither worked for me. I gave up and will end up sending the lens in for service.