keller said:
Something I've also noticed about film is that they say things like "For Sunny Conditions" (ie. Kodak 200 "Sunny").
Does this actually mean anything? Like if I brought a "Sunny" film and used it during night time, will it alter anything?
No, the "Sunny" is there because it'll not be much use indoors. Use the ISO levels as appropriate:
20-50 - very sharp images, probably gonna need a tripod under most conditions as you need a lot of light to expose it.
100 - My personal choice as it's more convenient than 50 especially when hand-holding. It's the next smallest grain size and is generally good stuff.
200 - I haven't even seen a picture taken on 200 ISO film which has looked reasonable. Kodak 200 is my second-least favourite film in the world. Use the more popular and more developed 400 instead. Note there are exceptions, but Kodak 200 (not Kodachrome) is very nasty.
400 - General all-purpose. Works fine in most situations, but noticably grainier than 100.
800 - Shoot indoors under "normal" indoor lighting. Grainy.
1600 - Same as 800 but even grainier. There are some very nasty 1600 colour films like Fuji Neopan, which look wishy washy. I don't see a situation where you'd ever want to use this film, except maybe pap work.
3200 - So grainy it's black and white time. Great for those awkward moments where flash would ruin things. I use T-Max 3200 quite a lot for moody stuff.
6400 - You can clock most 3200 film up to 6400. The only downside is that a correct exposure will most likely make using the viewfinder impossible - it's DARK.
IMO Kodachrome 25/64 would be more red than velvia and velvia would be more green than kodachrome.
Hope this helps!
Rob