I've had this camera for a while and it's able to take some decent photos, however I'd like to take some more close-up shots of the fish and plants in my tank. I don't really know much about photography and not sure what I do with the ISOs and F numbers. I just point and click. I do use the manual focus. http://www.amazon.co.uk/Canon-PowerShot ... =de_a_smtd I'm wondering if I should invest in the macro lens http://www.amazon.co.uk/Canon-CU58250D- ... 206&sr=1-1 Along with the lens adapter http://www.amazon.co.uk/Canon-DC58G-Len ... 206&sr=1-1 Do you think it'll be worth it?