I really do like the pack. You can haul a lot of gear. It is well made and can carry a full size tripod. The only negative is the depth. It is not very deep. It will not handle a pro body or one that has a battery pack on

Yes the Expedition 5x has been discontinued as are all the original Tamrac bags since Gura Gear bought them out. I am not sure I like them as much now

Even though the D5100 is a newer camera, it is a camera that you access functions per a menu system where as the D90 has buttons to help change certain functions. Also like what everyone else mentioned it has no built in af motor so you need to use AF-S lenses or lenses with built in motors

I have the Tamrac Evolution 9 sling pack / backpack. The evolution series can be worn either as a backpack or sling pack. They have several in the series. The evolution 9 is the largest

Hi Daleg
There are two versions. One is a variable aperture f/4-5.6 which is theone I have and then there is the f/3.5. I am in Hawaii right and the shots are great with it. I am unable to download any shots at this time since I am using my IPad and cannot convert from raw

Hi
Hour sister-in-law can just remove the batteries from the bottom of the hand grip and replace them. I had this camera awhile back and I think they are CR123 lithium batteries

All outside pens for the animals do not have bars in place. any animals that are in the Reptile house, Bird house or the primate house are behind glass enclosures. I go there quite often and have no problem using a tripod any where.