Canned_Tuna wrote:
By the way, you said that there are practical benefits to having a zoom lens, so do you think I should take a zoom len, then train my self by trying not to chance the focal length ( I mean use it like a prime len ), and only chance focal length in some special cases ?
I hate to say it but it really does depend. While I said there are practical benefits in having a zoom lens, it's not all one-sided as primes have their own benefits as well in the sense that on a "dollar per quality" or "dollar per quantity" basis, they generally offer better contrast, sharpness and speed (aperture) than a similarly priced zoom.
I won't advise whether to go for prime or zoom as I don't know how practical/impractical it is for you to get closer to or from your subjects. I personally use zooms because it's often the case that I can't get closer to my subjects and I'm happy to trade off some IQ for the flexibility but I'm not suggesting you follow or ignore my example.