I had came across this question when i just started out photography, thinking i so wanna get a Ultra Wide Angle (10-22 *cropped sensor* ) to capture landscape shots, but after playing around with my 18-55 for quite awhile, i realise actually it is more than enough, and i instead yearn to have a longer telephoto to capture the landscape shots :bsmilie:
So ya, for me i think if you need Wide Angle, 17-18 on cropped sensor should be more than enough as for UWA lens it maybe hard to control the composition as you include alot of detail in your picture. Issolate a certain location with your telephoto may bring out a better effect :thumbsup:
Dont rush gettings of filter too, cause the threads will be different with different lens, then you'll end up needing to get more if you are changing lens next time, I think you should just get a basic UV filter to protect your lens, and decide what to get much later on :thumbsup:
Many years ago, when I went to NZ, I only have with me 50mm film Nikon camera. Landscape comes out just fine! So 17mm should be no problem.
Anyway, nowadays, it is so easy to make pano shots, so UWA may not be that necessary. Ideally, you just need a tripod to keep things straight; a longer focal len probably easier to stitch cf to shorter focal len