Lens has OM mount. Please note that this is a teleconverter that allows 1:1 macro focus with 50mm f1.4, f1.8 lenses.
Lens is in an excellent condition. It shows light wear on exterior. Filter rim looks good and it accepts filters. Front Glass does not have any visible scratches. I don't see any fungus or haze inside the glass. Glass is very clean and free of dust. Glass looks very nice over all.
Shipping is free within USA and $15 via USPS first class air mail service worldwide. You can choose faster (and more expensive ) shipping if desired during checkout.
It will be mailed as pictured with both caps.
Lens is sold with two month warranty and full money back guarantee.