Sky watcher dob 150 or 200? in Getting Started Equipment Help and Advice Posted 3 hours ago I would go for the 200p as it is a full size dob and not a tabletop dob. With the 150p I suspect one of the first things you will want to change will be to swap the tabletop mount to something tripod based. 23 minutes ago, Girders said: if you are in an urban area it won't make any difference between the two Not true. The larger aperture will perform better than the smaller scope under all sky conditions. The only time the smaller scope wins is when it is small enough to be transported to a darker site and the larger scope isn't.