You can use a tool like this https://www.amazon.com/DSLRKIT-Repair-Filter-Ajustment-Steel/dp/B00SYBYTZO That's just an example, there is tons of these available. If you use "lens vise", filter thread repair or something similar in google/YouTube you'll find a lot of videos and websites that describe how to use these.
Thank you sir! Here is the tool! very helpful. I just put a cardboard cutout in the lens so it couldn’t get accidentally scratched and it worked wonders. It takes a lot of time and finessing though. There are also YouTube videos available on how to use the tool. Good luck!
All these people saying it’s not worth it. I would throw 30 bucks at this tool. If it doesn’t fix it you have a useful tool for photographers. DSLRKIT Pro Lens Vise Tool Repair Filter Ring Ajustment Steel 27mm to 130mm https://www.amazon.com/dp/B00SYBYTZO/ref=cm_sw_r_cp_api_i_FCANFbXADM82A
You can try buying a camera lens vise, although I'm skeptical of how well they will work. see - https://www.amazon.com/DSLRKIT-Repair-Filter-Ajustment-Steel/dp/B00SYBYTZO
In terms of repair, I had the same thing happen to my Sigma 16 f1.4, it cost me $60 (including return shipping) and they replaced the barrel and ensured the lens was still calibrated. This is for a $410-$430 lens. I am not sure how much Zeiss/Sony charges, but I'm going to guess its more.
Try one of these before you risk damaging the lens.
https://www.amazon.com/DSLRKIT-Repair-Filter-Ajustment-Steel/dp/B00SYBYTZO
i use this to fix mine
https://www.amazon.com/DSLRKIT-Repair-Filter-Ajustment-Steel/dp/B00SYBYTZO
https://www.amazon.com/DSLRKIT-Repair-Filter-Ajustment-Steel/dp/B00SYBYTZO maybe try one of these?
Yet another reason not to leave a useless UV filter on your lens all the time. Usually I would recommend trying to get a stuck filter off with a jar opening tool of some kind (e.g., the silicon rubber grips), but with a bend that severe you might have to get out a hack saw and cut the rim of the filter for it to come off.
The lens' filter threads might be repairable with something like this, but how effective it is will really depend on the construction of the lens. If the filter threads are really heavy-duty you may not be able to do it by hand, if it's repairable at all (without disassembling the replacing the threads altogether).
The biggest issue is potential internal damage, so you'll want to run some tests (e.g., shooting brick walls from a tripod at a 90-degree angle). Even if the autofocus (and VR/IS, if applicable) work perfectly and the lens appears to work mechanically, there is a really good chance that the lens is decentered, in which case you'll basically have to send it off for repair.