To qualify for the trade in bonus against the GFX 50s, you must have one of the following cameras:
Canon
EOS-1D C / EOS 1100D / EOS 1200D / EOS 20D / EOS 20Da / EOS 300D / EOS 30D / EOS 350D
EOS 400D / EOS 40D / EOS 450D / EOS 500D / EOS 50D / EOS 550D / EOS 5D / EOS 5D Mark II
EOS 5D Mark III / EOS 5D Mark IV / EOS 5DS / EOS 5DS R / EOS 600D / EOS 60D / EOS 650D
EOS 6D / EOS 700D / EOS 70D / EOS 750D / EOS 760D / EOS 7D / EOS 7D Mark II / EOS D2000
EOS D30 / EOS D60 / EOS D6000 / EOS-1D Mark II / EOS-1D Mark II N / EOS-1D Mark III
EOS-1D Mark IV / EOS-1D X / EOS-1Ds / EOS-1Ds Mark II / EOS-1Ds Mark III
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Fujifilm
S1 / S2 Pro / S3 Pro / S5 Pro / X-A1 / X-A2 / X-E1 / X-E2 / X-M1 / X-Pro1 / X-Pro2 / X-T1 / X-T10
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Konica Minolta
Dynax 5D / Dynax 7D
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Leica
M Typ 240 / M8 / M8.2 / M9 / M9-P / M-E Typ 220 / M-Monochrome / S2 / T (Typ 701)
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Nikon
D1X / D200 / D2H / D2Hs / D2X / D2Xs / D3 / D300 / D3000 / D300S / D3100 / D3200 / D3300
D3S / D3X / D4 / D40 / D40X / D4S / D50 / D5000 / D5100 / D5200 / D5300 / D5500 / D60
D600 / D610 / D70 / D700 / D7000 / D70s / D7100 / D7200 / D750 / D80 / D800 / D800E
D810 / D810A / D90 / Df
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Olympus
E-1 / E-3 / E-30 / E-300 / E-330 / E-400 / E-410 / E-420 / E-450 / E-5 / E-500 / E-510 / E-520
E-600 / E-620 / EM-1 / EM-10 / EM-10 Mark II / EM-5 / EM-5 Mark II / E-P1 / E-P2 / E-P3
E-P5 / E-PL1 / E-PL2 / E-PL3 / E-PL5 / E-PL7 / E-PM1 / E-PM2
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Panasonic
LUMIX DMC-G1 / LUMIX DMC-G10 / LUMIX DMC-G2 / LUMIX DMC-G3 / LUMIX DMC-G4
LUMIX DMC-G5 / LUMIX DMC-G6 / LUMIX DMC-G7 / LUMIX DMC-GF1 / LUMIX DMC-GF2
LUMIX DMC-GF3 / LUMIX DMC-GF4 / LUMIX DMC-GF5 / LUMIX DMC-GF6 / LUMIX DMC-GF7
LUMIX DMC-GH1 / LUMIX DMC-GH2 / LUMIX DMC-GH3 / LUMIX DMC-GH4 / LUMIX DMC-GM1
LUMIX DMC-GM5 / LUMIX DMC-GX1 / LUMIX DMC-GX7 / LUMIX DMC-GX8
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Pentax
PENTAX K-3 II / PENTAX K-30 / PENTAX K-5 / PENTAX K-5 II / PENTAX K-5 IIs / PENTAX K-50
PENTAX K-7 / PENTAX K-m / PENTAX K-S2 / Pentax Q
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Samsung
Galaxy NX / NX1 / NX10 / NX100 / NX1000 / NX11 / NX20 / NX200 / NX210 / NX30 / NX300
NX3000 / NX5 / NX500
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Sony
DSLR-A100 / DSLR-A200 / DSLR-A230 / DSLR-A290 / DSLR-A300 / DSLR-A330 / DSLR-A350
DSLR-A380 / DSLR-A390 / DSLR-A450 / DSLR-A500 / DSLR-A550 / DSLR-A560 / DSLR-A580
DSLR-A700 / DSLR-A850 / DSLR-A900 / ILCA-77M2 / ILCE-3000 / ILCE-5000 / ILCE-5100
ILCE-6000 / ILCE-6300 / ILCE-6500 / ILCE-7 / ILCE-7M2 / ILCE-7R / ILCE-7RM2 / ILCE-7S
ILCE-7SM2 / NEX-3 / NEX-5 / NEX-5R / NEX-5T / NEX-6 / NEX-7 / NEX-C3 / NEX-F3 / SLT-A33
SLT-A35 / SLT-A37 / SLT-A55 / SLT-A57 / SLT-A58 / SLT-A65 / SLT-A77 / SLT-A99