The glass and coating are excellent with no scratches, abrasions, haze of fungi. I can help guide you with a tutorial I've made with step by step instructions and sequenced photos. Or I can replace it.
eBay
7artisans 7.5mm F2.8 Mark II Ultra Wide-Angle Fisheye Manual Lens for Sony E Fuji XF Nikon Z Micro M4/3 Canon EOS-M M50 Canon RF
Aliexpress UK
We appreciate your understanding. All products have been tested and verified to be in working condition.
eBay
For FD-EOS FD-CANON FD Lens Adapter Ring With Optical Glass Focus Infinity Mount to for canon EOS EF Camera 500d 600d 5d2 6d 70d
Aliexpress UK
eBay
For Canon EOS Camera Body Cover + Lens Rear Cover Cap For Canon EOS mount for EF 5D II III 7D 70D 700D 500D 550D 600D 1000D
Aliexpress UK
Rare SICOR-XL AUTO MC f=28mm f/2.8 Lens, Canon Mount. Very good condition. Comes with front cap.
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Canon EF 24-105mm f/4 L IS USM Lens for Canon EOS SLR Cameras
Aliexpress UK
(Canon lens cover. It is tested with batteries and film (the film is not processed). date 04/1984).
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Lightdow T/T2 Mount Lens Adapter Ring for Canon EOS Rebel T3 T3i SL2 6D 7D 7D 60D 70D 77D 80D Sony Pentax Fuji Canon DSLR Camera
Aliexpress UK
Only thing to point out on the top of it looks like a sticker residue that I could not get off. See photos for details.
eBay
SG Image 25mm F1.8 Large Aperture Manual Lens for Sony E Nikon Z Canon R Sigma Leica L Canon EOS M M43 Fuji X R6 ZVE XT A6300
Aliexpress UK
eBay
B4 2/3" - Canon RF Mount Adapter Ring for All 2/3" B4 mount movie Lenses to Canon EOS RF mount Camera EOS R,RP,R3,R5,R6 etc.
Aliexpress UK
This ensures a secure, wiggle-free connection between the lens and adapter that can appear in non CINE models. It also has black felt on the interior, reducing light leaks and preventing light bouncing around inside the adapter.
eBay
10mm F5.6 Fisheye APS-C Lens MF Focus for Canon EOSM Sony E Canon EF-M Fuji FX Olympus M4/3 Panasonic M4/3 bayonet body
Aliexpress UK