You can output Tiff, Jpeg, GIF or PNG I think. I don't think that in standard mode you get better than screen resolution with any one over the others, but you may have a preference. JPEG is usually the best for size and convenience.
Also even without extra licenses you can use the top three types on the pull down menu (Flat, Gouraud, Phong). You get better resolution with these and can even set up materials to some extent, (they look much better with the Studio rendering license). You can change the preferences to increase the resolution using that method.
Best regards
Hudson