D600 with D7100 as Back up

Duncan,

Yes, it will be an adjustment if the D600 dies in the middle of a shoot. I understand that if I am shooting at let say 24mm in FX it will be like shooting a 35mm (approx) on a DX right? I actually created a chart below to get a mental picture of what it would be like.

FX   vs  DX     FV Comparison

Field of View (degrees angle)

Focal  Length                              FX                    DX

500 mm                                     5                      3

400 mm                                     6                      4

300 mm                                     8                      5

200 mm                                     12                    8

135 mm                                     18                     12

85 mm                                      28                      18

70 mm                                       34                     22

50 mm                                       47                     31

35 mm                                       62                     44

28 mm                                        74                     53

24 mm                                       84                      61

20 mm                                       94                      71

16 mm                                       107                    83

14 mm                                       114                    90

12 mm                                        122                   98

8 mm                                          143                   115

I think I will have to get this cheat sheet taped on my bag if I go further with my plans.

Lets hope that the D7100 comes in with favorable actual user test IQ and AF that is.

Thanks again for your input.