Thom's eBooks for Nikon and Sony cameras (Latest: Complete Guide to the Nikon Z6 II and Z7 II, Complete Guide to the Nikon Z50, and Complete Guide to the Nikon Z5)

Last Six Months:
Recent firmware update page
Olympus E-M1X 2.0 (Dec)
Olympus E-M1m3 1.2 (Dec)
Olympus E-M5m3 1.3 (Dec)
Olympus E-M1m2 3.4 (Dec)
Panasonic S1 1.6 (Nov)
Panasonic S1H 2.2 (Nov)
Panasonic S1R 1.6 (Nov)
Panasonic S5 2.0 (Nov)
Fujifilm GFX100 3.0 (Nov)
Fujifilm GFX50S 4.10 (Nov)
Fujifilm GFX50R 2.10 (Nov)
Fujifilm X-S10 1.01 (Nov)
Canon R5 1.2.0 (Nov)
Canon R6 1.2.0 (Nov)
Canon RP 1.6.0 (Nov)
Canon R and Ra (1.8.0) Nov
Nikon Z6 II 1.01 (Nov)
Sony A7Sm3 1.02 (Oct)
Hasselblad X1Dm2 1.4.0 (Oct)
Nikon Z5 1.02 (Oct)
Nikon Z6 3.12 (Oct)
Nikon Z7 3.12 (Oct)
Fujifilm X-H1 2.11 (Oct)
Fujifilm X-T3 4.00 (Oct)
Fujifilm X-T1 5.52 (Sept)
Fujifilm X-T2 4.40 (Sept)
Fujifilm X-T4 1.10 (Sept)
Fujifilm X-T20 2.10 (Sept)
Fujifilm X-T30 1.30 (Sept)
Fujifilm X-Pro1 3.82 (Sept)
Fujifilm X-Pro2 5.10 (Sept)
Fujifilm X-Pro3 1.10 (Sept)
Fujifilm X-E3 1.30 (Sept)
Sony A6600 1.10 (Sept)
Nikon Z50 2.01 (Aug)
Sigma fp 2.01 (Aug)
Sony A7Rm4 1.2 (Aug)
Olympus E-M1 4.6 (Aug)
Olympus E-M1m3 1.1 (Aug)
Fujifilm GFX100 2.01 (Jul)
Panasonic GH5 2.7 (Jul)
Panasonic GH5S 1.6 (Jul)
Panasonic G9 2.2 (Jul)
Panasonic G95 1.2 (Jul)
Panasonic G85 1.5 (Jul)
Panasonic GX9 1.5 (Jul)
Ricoh has updated their GXR firmware to version 1.5. Added features include full or 1/3 stop ISO settings, ISO bracketing, interval shooting, a raw only mode (as opposed to raw+jpeg), and bulb or long time shutter speeds.
One funky aspect of GXR updates is that you need to update each lensor unit individually.