Generally speaking, my photography generally consists of: #1 macro (insects, science,etc) #2 landscapes #3 long-exposure night photography (i.e., stars) #4 some wildlife (i.e., birds, deer, etc). With this upgrade, I also want the ability to dabble in portraits/weddings. This is not my priority, but something that I could build up over time.
In addition to my D5100, I have the current gear: Glass: Nikon 50mm 1.8 AF-S Tamron 90mm 2.8 Macro Nikon 70-300mm VR f4-5.6 AF-S Sigma 10-20mm f4-5.6
Accessories: Kenko Extension Tubes for Macro Nikon SB-700 Flash
My plan: Camera: The hardest decision to make and where I could use the most feedback. I know the D610 is probably the best choice in terms of quality/cost ratio. It is a great camera that could probably handle everything I throw at it.
However, I am also agonizing over how the D800 is particularly well suited for macro and landscape photography. I like how the large sensor allows for flexible cropping options and that it also has more focus points. Because the D800 excels at my two primary shooting approaches, I am starting to believe I should go with it instead of the D610.
Lenses: I know I have work to do in the lens department. However, I also believe that my initial purchases were careful enough that most of my lenses will work well on FX (i.e., Nikon 50mm, Tamron 90mm, and Nikon 70-300mm). I know I would eventually need to upgrade to a better macro lens (i.e., Sigma 150mm 2.8) and a better telephoto (i.e., Nikon 70-200mm VR 2.8); however, I feel both of these lenses will work for the time being.
The Sigma 10-20 f4-5.6 definitely has to go and I plan to upgrade that lens first. I definitely want a 2.8 lens, and have been looking at the few limited options (i.e., Tokina 16-28mm 2.8 FX Pro, cheapo Rokinon 14mm 2.8, or the Nikon 14-24mm 2.8 with the huge price tag,), but I am still undecided on what is best. Feedback relating to the best camera choice and lens upgrades would be very much appreciated!