Sony 24-70 2.8 GM Lens Teardown / Disassembly 

yes, it's a pain in the a** to get that rubber seal seated properly :D

I bought it from a vendor that I found on AliExpress, who was also selling on ebay (I chose ebay for buyers protection). The element is an original Sony one and was brand new when I got it. I just paid ~300 € It's still available ( google for New Front 1st Optical lens block glass group Repair parts For Sony FE 24-70mm f/2.8 GM SEL2470GM lens ) on AliExpress. Thanks for your comment and I hope you can repair your lens aswell.

the front assembly is several lenses glued together, it is impossible to just replace one lens, you have to replace the full front lens assembly which is ~350 USD for the parts

you have to unscrew the ornamental ring in front. For that you need a special tool and maybe some solvent. I have no idea if it is glued in place. The tool required is circular with a rubbersurface to create friction to unscrew the ring. under the ornamental ring youll find screws.

Just search Aliexpress. That's where I found it.

@@FriedrichWeidig I found a few but is just a ring or does it come with glass?

I'm so sad my front lens is cracked on edge :(

The ornamental ring is just a ring that covers a gap between the lens barrel and the front assembly . The actual front assembly you can find aswell. Look in the other comments . Basically search for front assembly SEL2470GM or 1st lens group or similar keywords.

yes, its a full assembly, lens elements glued together

theoretically you can just unscrew the ornamental ring infront of the glass and then remove the screws that hold the front tube in place (the one with the filter threads), I don't know if it was because mine was bent as well but there was no way for me to unscrew the ornamental ring withouth destroying the remaining glass and using pliers (as seen in the video). I didn't see any adhesives under the ornamental ring but I'm not 100% sure about this. So maybe you'd have to take a heat pistol or something like that and warm it up before trying to remove it. There are NO hooks in the ornamental ring (like there are in other lenses to remove the ring). So all you can work with is friction. Im yet to find out how to properly remove it... Once you managed that, the rest is a piece of cake and you dont have to bother with disassembling the whole lens. Sorry that I can't be of help with this, please let me (and others) know when you have found a solution to that problem. edit: since the glass elements are glued together I retract my statement to use a heat pistol. You probably end up with a disfunctional lens assembly "The retainer rings of lens may have a clear thread locker applied at the factory and will not budge until the thread locker is dissolved. Use a cotton swab saturated in Acetone/nail polish remover and wet the threaded area thoroughly then allow the lens to sit for 5 to 10 minutes before trying to remove the retainer. A second application may be necessary."i found this in a forum thread about the removal of the ornamental ring for an older lens... maybe that still applied and helps.

@@FriedrichWeidig Thank you! I apologize for my late response. I just rewatched your video and I understand exactly what needs to be done. I’ll first try to remove the ornamental ring by hand before applying the nail polish to release the thread-locker. I’ll let you know how it goes!

@@damianpeyrot better not use nail polish :p , use nail polish remover and you have to use it before unscrewing the ornamental ring, otherwise you won't get it off... But this is still just an assumption

@@damianpeyrot Hello! I'm about to try this on my lens - did you have any luck with acetone? It'd be nice to not have to disassemble the entire lens! Thanks!

Hello! Thank you so much for this video. I'm wanting to replace the front element on my lens - did you ever learn more about whether it's possible to remove the front ornamental ring with acetone? I'm trying to avoid breaking down the entire lens. Thank you!

I haven't experienced any issues ever since. Autofocus is as quick and reliable as it used to be. I haven't actually checked colors, but it looks "normal" no color fringing or washed out colors of any kind. I compared the sharpness with images from prior to the accident and couldn't see any difference. So I'm more than happy with the repair and the lens still works fine. (Although I recently got a 35 - 150 Tamron which replaced the gm as the always on lens)

You like the Tamron? @@FriedrichWeidig

@@djmadmike23 I love it, Im currently travelling through Japan with mostly the 35-150 attached. The only other lens I took with me is the 20-40 2.8 and I couldnt be happier with that combination.

@@FriedrichWeidig thanks I just pulled the trigger on a Samyang while I fix the Sony… I think I e been sipping the media juice too long. Can’t wait to compare.

@@djmadmike23 perfect, I think picture quality wise it's similar to the Tamron but what puts me off is the higher weight. It may isn't much but definitely worth the few extra bucks to go as light as possible. I've met a tourist yesterday at Nikko who had the a7iv with the Samyang on while I was rocking the Tamron on my a7iv and we could compare. You definitely feel the difference. Also the Tamron is less bulky

See my reply to kid richmond

I dont remember the size but I got a "Precision Mechanic Tool Set" with tons of bits to choose from at AliExpress for like 10$

none at all, I didn't remove any grease so I just used what was already being used.

it could be that the lens barrel has slightly bent. I wont really be able to tell you what to replace, sorry.

the "front assembly" is glued together... it consits of at least two lenses... so there is no way around but to buy that whole front assembly... it will set you back around 300 USD on aliexpress/ebay.

Unfortunately I can't tell you how to properly unscrew it, it's tight af. I saw other lenses that had hooks in that front ornament to unscrew it , this one doesn't have the hooks though. So all you can do is go with friction. Like a 3d printed tube with the right diameter and some rubber under it to increase the friction and then unscrew it would by my best bet

The assembly consists of three glass elements that are glued together. So no, unless you have industry standard machinery and optical Testing devices you will have to replace the whole assembly (which is basically one element)

Sounds like the flat cables to the motherboard aren't attached properly. Check the cables!

I didnt see any glue, it's just tight as it comes. the actual sealing is on the front assembly itself (see the blue rubber ring at 3:25 ). so the ornamental ring just has a cosmetic purpose (hiding the screws). I didnt remove any glue at least... at 2:51 you can see me demonstrating how I took it off with pliers, took a lot of force all the way through. When my lens hit the floor the front barrel bent a bit... so I assume it is easier to screw off with a non-bent barrel. Unfortunately thats all I can tell you... a lot of friction is needed! But since you just need to remove fungus it probably is easier to just go from the back, dismantle it and pull it back together, no need to remove the front assembly at all. It is easier than it looks ;)

Did you attach all the flex cables properly?

You can definitely take it off yourself, it's pretty easy , but you will lose warranty!

@@FriedrichWeidig any idea what it might’ve happened to the lens ?:)) it’s stuck at 35mm and the zoom ring won’t even budge and neither the lock button. I would love your opinion :D

Yes, it is possible , you need to screw it off. You'll need some device that uses friction to get it off though

@@FriedrichWeidig the ring is nOt double tape on? It does twist on? Another video i saw uses tape

@@realslavmedia5792 @ 2:57 you can see that there is no tape whatsoever under the ornamental ring. But it is screwed in tight. I saw a 3D printed "tube" with a rubber ring at the bottom to screw it off in some other video (not the same lens though). There are no hooks to sink in as you may know... so you probably have to work with friction. And I think thats the only way to get to the screws of the front assembly... you have to take the ornamental ring off. But since yours is broken too? you could also just destroy the glass like I did. It means you have to dismantle the whole lens though :(

@@FriedrichWeidig yeah my atamos monitor mount came loose and i had one hand on cam and one on monitor and it slipped fell and broke. still works great just a minor vignyet in the corner. i have it disassembled 100% i had to take it apart to bang the ring more straight with a rubber mallet. i didnt want to jiggle the internals that much trying to straighten it out.

Open it, clean it with pure isopropyl ethanol put it back together, but please check if ethanol is the right solvent

How to take out front mirror

Sony 24*105 G oss

I marked all my lenses that way, it's just meant as a joke :D

How can I help you?

@@FriedrichWeidig I dropped my 24-70gm. Wanted to share photos with you, if I could fix it myself

@@aisleclicks9205 instagram.com/kevinschnippkoweit/ you can send me pictures here