This heavy ring mounts nikon lens on Canon DSLRs like 5D 10D 20D 30D 200D 350D 400D, and also film bodies, AF doesn't function, The diaphragm functions manually. The photographic exposure meter functions with most Canon EOS mount adapter. it is made of heavy duty steel alloy, not alluminium. we are genuine UK seller and we post monday~friday from UK, speed is insured and when there is a problem, we can always deal with it fast. Payment Paypal (no hidden charge) We don’t use cheque/postal order or any other payment methods. Postage All packets posted the next avaliable day, as long as payment cleared. UK via 1 st class / 1 st class recorded, normally takes 2~3 days, sometimes a week, royal mail won’t claim packets lost within 2 weeks; For International packets, there is no tracking number for standard airmail, if you need your packet tracked, please choose international signed for, which starts from 5 GBP by royal mail . l Canada & most European countries normally takes 1~2 weeks.