lens

Can anyone please tell me for sure if i need to or do not need to apply the 1.6 crop factor to this lens ? Sigma 10-20mm f4-5.6 EX DC HSM as it is specially made for a cropped body as someone has pointed out ? which would make it roughly 16-32mm by my maths on a Canon cropped body if i needed to...

Has anyone experience with either or both of these Tokina lenses? Or should I consider something else? (like Sigma 8-16mm) I never owned wide lens so I'm unable to tell the difference which one will be better 11-16 or 11-20? Please let me know your thought! Help.....help....help. Thanks Eve

Morning all! Just putting this out there since I'm off to Australia on Wednesday morning and want to go pick up one of the above lenses. I can get the 1.4 for £270 and the f2 for £310. Is the newer technology (faster autofocus, smaller package and silent motor) worth the extra £40 over one of...

Hello I'm looking to buy a tilt shift lens (I have a budget of arounf £500 - £700) and would greatly appreciate some advice please. My main question is what focal length I should go for? I would mainly be using it for the 'minature' effect. Thank you in advance!