![Any idea how to fix this? It's happening with my sigma 75-300mm lenses I haven't used it in over a year. I've cleaned it with a normal cloth by nothing is helping? : Any idea how to fix this? It's happening with my sigma 75-300mm lenses I haven't used it in over a year. I've cleaned it with a normal cloth by nothing is helping? :](https://preview.redd.it/48i1il42g2551.jpg?width=640&crop=smart&auto=webp&s=0a054676abd4249fe4b5925faefecfc9625a61cc)
Any idea how to fix this? It's happening with my sigma 75-300mm lenses I haven't used it in over a year. I've cleaned it with a normal cloth by nothing is helping? :
![Canon recommended to clean lens contacts: Canon EOS 7D / 10D - 90D Talk Forum: Digital Photography Review Canon recommended to clean lens contacts: Canon EOS 7D / 10D - 90D Talk Forum: Digital Photography Review](http://static.flickr.com/107/307373728_c20aac64ca_o.jpg)
Canon recommended to clean lens contacts: Canon EOS 7D / 10D - 90D Talk Forum: Digital Photography Review
![troubleshooting - My Canon DSLR is showing "Err 01" — should I send my camera for service? - Photography Stack Exchange troubleshooting - My Canon DSLR is showing "Err 01" — should I send my camera for service? - Photography Stack Exchange](https://i.stack.imgur.com/gdPNd.png)
troubleshooting - My Canon DSLR is showing "Err 01" — should I send my camera for service? - Photography Stack Exchange
Thomas Camera Services Ltd - #Error01 on a Canon EOS 650D. This fault can be caused by either the body or the lens. For example: lens contact issues on the body or
![Received an error code 01 on a 24-105mm I USM F.4, solutions? Already cleaned contacts too : r/canon Received an error code 01 on a 24-105mm I USM F.4, solutions? Already cleaned contacts too : r/canon](https://preview.redd.it/sa3ae5d3hrr91.jpg?auto=webp&s=bd7c5f8a48458692cfa38719e0fa27f2cbb24b89)