Add-on lens are always fun to use. While I try using one of my wide-angle/macro lens on top of Canon 18-55mm and Nikon 18-105mm lens’s I end up using a stepping ring on my Canon 500D camera. Lens holds best on Nikon thread.
One fine day I found that the stepping ring was in love with my Canon 18-55mm lens and it wasn’t listening to get back into the box. Found it really really hard to take it away from its place. There were two tricks which I tried to get the ring out of the lens.
1. Cold method: Tried to keep the lens in freezer packed in a good plastic cover to keep the lens away from condensation.
2. Heat method: Very good if the lens body and the Ring both are made up of metal. Took some hot boiling water and rolled the portion of the lens holding the ring slightly in the water to make it feel little hot.
Yes, the second tricked worked fine. Metal seem to have expanded for the heat and I could get the lens out from the ring. Hurray!
Caution:- BE CAREFUL while you play with lens. Don’t hurt it with scratches and finger prints. You might end up breaking the lens if your time is too bad. I suggest you to take it to lens shop in case you find yourself too young to take care of your own.