i just have a compact cam that does not even have a lens thread.. but someday i hope to upgrade to an SLR and was having doubts about all the lenses you pros seem to speak of.
here are my doubts
1. What is the significance of the focul length of the lens?
2. If 28-80mm or 35-105 or 50-150 (not sure of numbers) all give 3x zoom.. then why do we need all the 3 lenses?
3. If we do need such lenses what to use when?
Please enlighten me. Even giving links is enough.
thanks in advance