Originally posted by esman7 Hi, just wondering why a great number of people are content with lenses such as a 300mm fixed focal length lens. At that range, wouldn't people much rather have somewhat of a range?
I guess if you're trying to shoot really far and you want to be able to crop... that's cool or for macro stuff (is that the main reason)???
Just beware that if it's for some crazy reason, i may have to end up buying one
when you talk about a telephoto vs a telephoto zoom, many times you find you are always at the long end.
think about the issue another way, you have a specific image size on the sensor
image size = subject size x focal length / distance.
now you want to take a photo of a butter fly, 20 meters away, no matter what zoom you will have you will beat maximum, and want even more length,
zooms are useful to a point, but primes are, as some pointed out much lighter per mm of focal length, and if you are always at maximum, you are wasting a lot on capability you don't use.
That is why, for example, I use a teleconverter on my 70-200F2.8. in the case of the 2x TC I am almost always at 400mm, but with the zoom alone I am using both the entire range and 2 F stops of speed advangate. A 70-400 lens would never be F2.8 at 70, and weigh a lot more (like the bigma) it is for me just not interesting to have the range all in 1 lens