So....if you're grabbing your three favorite prime lenses...what are they?
For nature hikes, to have all my bases covered, I always go with
2 bodies,
4 lenses.
Body 1 = the D500 with the 300mm f/2.8 VR II glued to it, which is carried on a RRS tripod over my shoulder (+/- the 2x TC III);
Body 2 = the D810 with the Voigtländer 125mm f/2.5 macro at the ready, which is carried
on a holster at my hip;
(The 28mm f/2.8 AI-S is carried in a pouch, for wides, via interchange on my D810, as is the 50mm f/1.2 AI-S for portraits.)
Since I have to narrow it down to 3 lenses, here is my logic:
There is no way I would part with the 300mm + 2x TCIII on a nature hike. Its quality and flexibility make it mandatory for wildlife shooting.
There is no way I would part with the Voigtländer 125mm macro, as the ability to shoot macro on a nature hike is mandatory.
There is no way I would part with some kind of wide, or ultra-wide, on a hike for landscape. The 28mm AI-S is generally my go-to.
(The similar 20mm AI-S is sometimes substituted, but I prefer the handling and quality of the 28mm. I also have the 15mm AI-S, as an ultra-wide, but the flare is troublesome, the focus throw is a joke, plus the resulting image sharpness is less than the 28mm IMO)
Interestingly, for butterflies and such, I don't use my Voigtländer macro much anymore, since I can get virtually the same results with the 300mm VR II, with the added benefit of AF, and from farther away so as not to scare the subject. However, for stationary flowers, or still arthropods, where true 1:1 is necessary, and where I have the time to really compose, the Voigtländer macro, and its wonderful focus throw, are a joy to use. The ability to slowly and subtly focus are immersive.
I generally bring the AI-S 50mm f/1.2 for portrait shots, but since I have to be limited to 3 here, the 50mm could stay home and the Voigtländer could be used for portraits.
Jack
PS: For family get-togethers, or street shooting (where I don't need either a telephoto or a macro), I only bring 2 lenses in a small shoulder bag: the 50mm AI-S on my D810 with the 28mm AI-S available if I need a wide. I use
this bag for light carry; it's pretty nice.