I have listed some useful photography related links below, some of which I use on a regular basis.
DPS – Digital Photo School
DPS or Digital Photo School is run by Darren Rowse, and it is a photography related website with simple photo tips to help digital camera owners get the most out of their cameras.
I have 2 Canon Cameras, 3 Canon lenses and a few Canon accessories … so this is the site I visit when looking for Canon products.
I have added the Nikon site here in a measure of fairness as they have some great cameras also.
Sigma make good lenses and a visit to their website is worthwhile if you are considering a purchase
The Cokin series of filters are famous, and are good value
Other Photographic Sites of Interest
More photographic related sites will be added here over time…