50mm obj, 30mm tube 16x magnification - 0-600 range

vortex viper, bushnell elite 4200(not sure if that one has 30mm tube though), nikon monarch, and whatever else im missing! Low light is a high priority. Any help would be greatly appreciated. Thank you for your time.

Price is the best indicator of quality. All of those are good series.

Go with a 30mm tube if you need that size for your current mounts, but a 30mm tube does nothing for the optics or image brightness. A 30mm tube only allows more range of adjustment in windage and elevation. It does nothing for the optics, despite popular notions to the contrary. Going to a 30mm tube also greatly reduces your choices and typically restricts you to tactical style scopes. In an Elite 4200, try the 4200 Tactical 6-24x50 Another option is any Leupold with an LR (long range) in the designation). All LR versions have a 30mm tube, again, for more windage and elevation adjustments.