Hi Janis - pardon my dumb as dirt question. But, I posed an html question on Neil's WSO regarding html linking on hub pages. I have started my first hub and don't understand why my html code is not working. I've looked the page source on your Sigma lens and it seems I'm doing pretty much what you did - yet it does not work.
In the hub forum they talk about using simply isbn or something else from amazon and then putting your affiliate code in your hub page profile - which is all greek to me.