Disposing of a broken lens

My 20-year-old Canon 100mm macro lens has finally worn out. I have ordered a replacement and would like to properly dispose of my 'faithful pal.' Does anyone know if there are hazardous materials in a lens, or is it mostly metal and glass? Would like to know so I don't harm the environment by disposing of lens. Thanks.

I don't know but I wonder if a broker like KEH would take it and give you a few $ while they sell it as a bargain grade lens?

Post it on eBay with a full disclosure and priced cheaply to sell.

You'd be surprised what people might be looking for and will buy. Who knows, maybe someone is looking for that special spare part and you just might have it.

The Canon 100 Macro is one of the sharpest lenses Canon ever produced. You might want to check around to see if it can be repaired. If it repairable, and you do decide to sell it, you'll be able to get a much better return.

--P

Depending on how "broken" it is, any high school photo classes near you would be happy to have it.

Thanks for the suggestions but, I would hesitate to pass the lens along to someone else. The slider which covers the switch to control barrel movement, full or partial, is missing and the opening is covered with duct tape. The lens was still functioning until ths week when the barrel began to freeze intermittently and make clicking sounds when it did move. Since I am a macro enthusiast I decided I need a reliable lens and therefore am replacing this one.

Or keep the lens until your new macro shows up, then disassemble the old one and shoot it.

Something vaguely cannabilistic there...