I have had a quote of £460+VAT to repair my lens or £530+vat - Repair and Full Service. (I am looking for another quote for any Americans that is USD 848). However I thought should I look for an alternative as well whilst waiting for my lens to come back from the company that gave me this large quote, as it is quite heavy to use, worse than my Tamron 150-600 lens and I have shoulder problems which make this to be a pain. I found this website Using Raynox Adapters For Extreme Macro I have this lens and with a Canon 75-300mm f/4.0-5.6 plus an adapter I could get very good magnification 5.05:1 and with a longer working distance than my MPE65. However I think there is a flaw with my calculations, any ideas? If it were that easy and cheap everything would have done it. I have masses of photos to look through from my Colombia trip so there is no real urgency, saying that I love it. I googled this combination but no joy. If anyone has a really clever alternative, please let me know.