I'm going to South Africa on a 3-weeks vacation in November, about 50% wildlife and 50% landscape and other tourist stuff. As a backup and for extended reach I would like to pair my 5DIII with an aps-C/H body (my old 550D is most likely not up for it).
Since for me the 5DIII is more than adequate in all other respects, I don't want to invest too much money in this additional body, as I will sell it again and don't want to loose too much money in that progress, and I might purchase a 300 2.8 to go with it (for the 5DIII I've got the 70-200 2.8 II), and that lens costs quite a bit
At a local dealer there is a used 1DIII available for 1200 €, as well as a used 7D for 900 € (incl. grip), both not in perfect condition, but I'm confident that they are working well enough for my purposes.
The question now is which of the two is overall the better choice, considering fps, mp, iso, build, reach, af, etc.? Maybe somebody here has firsthand-knowledge of both of them and can help me decide
Or would it be better to get a 1DIV (or 7DII, if it arrives in time) and sell it afterwards? This would give the best body, for sure, but I'm afraid that having purchased it, I won't be able to part with it again, even if I don't need it, and I can't really afford this