I've been using film of and on for over thirthy years now I'm taking the plunge into digital buting a pentax k7 but I was wondering what lenes to go with the k7 have done a lot of reading and now I'm confused at the start I was looking at 18-200 f/3.5-6.3 and 10-24 f/3.5-4.5 any advice would be helpful.Thank you