My main focus has been to find out what is lightweight., so this is not a full list of all Nikon, Fuji, and Ricoh camera weights and lens weights.
That said, I have included one heavy camera because I ownd a Nikon D500, and that weighs 860g, I have included it to show where is sits in the continuum of weight. Basically, it weighs the same as two D3500s or three-and-one-third times the weight of a Ricoh GR III, or two-and-a-half times the weight of a Fuji X-E3.
I have also listed lightweight lenses. As you will see, the X-E3 plus a 27mm lens is 30g lighter than an X100s, but the form factor might make the X100s more pleasant to carry because the lens doesn’t stick out. If you like to protect your cameras like I do, then putting the X100s in a Fuji leather case is a good option but it bumps the weight up to 605g.
But then, after I bought the X-E3 I realised I was going to have to carry a Billingham case because otherwise I would have to carry the camera slung over my shoulder. And I really do not like carrying a camera without any protection. When I am using it, yes. But otherwise I like to protect it somehow, and the cases for the older model X100 series were perfect because they were all in one piece. That is not the case with the X100V and the X100VI. For some reason Fuji decided to make a case such that when you opened it, you were left with the top piece in your hand. And what are you supposed to do with that while you are shooting?
That said, if there is one brand that I observe stands up to rough treatment best, it is Nikon cameras. They wear well.
Fuji Cameras
XF10 280g
X-A7 320g
X-T10 381g
X-T20 383g
X-T30 383g
X-T30 II 383g
X-T50 438g
X-T2 507g
X-T3 539g
X-T4 607g
X-T5 557g
X-E2 350g
X-E3 337g
X-E4 364g
X-S10 465g
X-S20 401g
X-Pro2 495g
X-Pro3 497g
X100s 445g
X100F 469g
X100V 478g
X100VI 521g
Fuji Lenses
XF18-55mmF2.8-4 R LM OIS 310g
XF16-50mmF2.8-4.8 R LM WR 240g
18mm f2 116g
23mm f2 R WR 180g
27mm f2.8 78g
33mm f1.4 310g
35mm f1.4 187g
35mm f2 R WR 170g
30mm f2.8 R LM WR Macro 195g
50mm f2 R WR 200g
Ricoh GR
Ricoh GRIII 257g
Ricoh GRIIIx 262g
Nikon Cameras
D3400 460g
D3500 415g
D5500 470g
D5600 465g
D500 860g
D750 840g
D7500 720g
Z50 450g
Z30 405g
Z50ii 550g
Nikon Z5 675g
Nikon Z5ii 700g
Nikon Z6/Z6ii 705g
Nikon Z7/Z 7ii 675g
Nikon Z8 910g
Nikon Zf 710g
Nikon Lenses
Z 28mm f2.8 SE lens 155g
Z 16-50mm (3.5-6.3) 135g
Z MC 105mm f/2.8 VR S 630g
F mount 35mm f1.8 200g
F-mount AF-S DX 18-55mm f/3.5-5.6G VR II 195g
F-mount AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED. 750g
Full Frame Mirrorless Cameras
Canon EOS R6 680g
Canon EOS R6 II 670g
Canon EOS R8 461g
Canon RF 50mm f1.8 STM lens 160g
Canon RF 35mm f/1.8 Macro IS STM 300g
Nikon Z5 675g
Nikon Z6 II 705g
Sony A7 III 650g
Panasonic Lumix S5 II 740g