For prime lens, anything with diagonal angle of view of more than 50degrees is consider WA.
Hope that helps
First, I am using a Canon EOS 1000D with the kit lens (18-55mm IS), and I have bought the 55-250mm IS and 50mm f/1.8. I find this combination very versatile and pretty good for beginners. The reach using the two zooms combine for a good reach (18-250mm) which can be used for nearly any situation. The 50mm f/1.8 gives you some low-light ability.
Next, as for the 55-250mm USM and IS differences:
The USM one is older, non-IS, is EF (can be used on APS-C crop and full frame) It is considered an inferior lens with mediocre image quailty.
The IS one is very new (released in 2007), is EF-S (Can only be used on APS-C crop) It has good image quality for its price, and I personally find it a excellent beginner telephoto zoom.
http://www.the-digital-picture.com/R...ns-Review.aspx . If you want your camera to shoot at a wider angle, you should get 17mm or lower. If you prefer the range between 18-135mm, Canon do have this lens and it is within your budget. You should read up the reviews first before you get the lens.
"Overall, the Canon EF 55-200mm f/4.5-5.6 II USM Lens is not a great performer optically.
Sharpness is one of the disappointments with the Canon EF 55-200mm f/4.5-5.6 II USM Lens. Reasonable sharpness requires at least f/5.6 or f/8 at all focal lengths. Vignetting is also noticeable until similarly stopped down - even on a 1.3x FOVCF body.
CA (Chromatic Aberration) is especially apparent on the long end of the focal length range. The Canon EF 55-200mm f/4.5-5.6 II USM Lens shows slight pin cushion distortion at most focal lengths - again, even on a 1.3x FOVCF body."
Is it available separately and advice on price?
kit lens rule, it is meant for noobie like us to torture it and get to know what SLR is all about b4 going for greater n more expensive lens for better quality. ya know, dont waste hard-earned money if u r not at that stage yet