In order to understand how lenses work on different cameras one needs to be constantly converting. For example a 50mm lens of a full frame sensor is 50mm, so it is neither wide angle or telephoto. If you put this same lens on an APSC sensor you need to multiply by 1.5, once you have done this you discover that on this smaller sensor it is really a 75mm lens, so it has a slight telephone effect. This can get very confusing so I have done up a simple conversion table for the standard size camera sensors, in the table below. If you are unsure what size sensor your camera has I recommending checking Digital Photography Review.