Originally posted by miks I won't be making money off photography so its not a "really need" or is it a need because my kit isnt set yet... i'm confused
the reason I put "need" vs "want" is that there have been a lot of threads on how to establish a lens kit.
In these threads and as I stated in my first response you need to plan out your lenses, and work out a way to get there.
For me, when you consider I travel a lot and also do nature, I decided I needed 3-4 zooms that cover the range 10mm to 400mm. I do this with a Sigma 10-20, a tamron 28-75 F2.8 and a sigma 70-200F2.8 plus 1.4x and 2x TC's. If I need something to fill the gap of 20-28mm I take the SMC-FAJ 18-35 that came on my *istD. This gives me a base travel kit of 4 lenses and 2 TCs and this covers the range pretty well.
BUT this kit is limited to F2.8 or slower.
To compensate for that I have begun collecting primes, to supliment the primes that I had with film. All of my primes are faster than the zooms at any given focal length, and aside from portraits, I use them for night photography, or to cut down the weight of my 4 lens AF zoom kit. For example, I have travelled often with just the 10-20, th4e 28-75 and a 135 F2.5 when I knew that extreme tele was not needed, and the 135 is a lot lighter than the 70-200F2.8.
I have decided to stay with MF primes, only because when I am using them I don't really feel the need to have AF or even auto exposure. Manual exposure is pretty easy when you get used to it.
so to "control" my LBA, I set some basic rules, that except for the 85mmF1.9 I have followed pretty well. Nevery buy anything slower than I already have at any focal lenght.
when you have from 28mm to 200mm already covered at F2.8, that gets pretty tough.