I am looking into purchasing a DSLR/lens that will be suitable for landscape, but also close up detail photos. I am an optometrist and will be using the camera primarily to take shots of the eye under normal lighted conditions or with cobalt blue illumination to fluoresce stain instilled in the eye. I can shoot directly or using an adapter on my confocal microscope. Many of my colleagues successully use point and shoot cameras to take direct photos of the eye.
I would also like to try my hand at some landscape shots. I haven't owned any camera other than the Minolta Super T FSLR that I used as a teen. I have read about DX having better pixel density with zoom lenses &/or that higher resolutions 20+ are really needed for landscapes. I have only shot them with large format film loners.
Any infomation/ suggestions that you have will be greatly appreciated.