Prior to getting the Df I wanted another camera for travel that performed better in low light conditions. My typical travel kit consisted of the D300 with a 12-24 f4, 28-70 f2.8, a macro lens 60 f2.8 and the 70-200 f2.8. As well as assorted cables, a flash, batteries, extra memory cards, etc. I live by the rule it is better to have it and not need it than to need it and not have it, so I take enough to cover most of my perceived needs. On a trip to the Gobi this year, out of my 35lb weight limit, my camera gear was 14lbs. Needless to say, I had to have another passenger check my gear as he was traveling light. My most recent trip to China, I took the D300 with the 35 f1.8 DX, 50 f1.8d and the 18-70 DX. I used the 35 for most of the trip and the other 2 occasionally, walking around with a light sling bag. I had some back pain from that setup.
When I first handled the Df I noticed the weight difference right away, so much so that I considered not getting it. The Fuji X20 was the other camera I considered for a travel camera. After the 3rd time handling one, I pulled out the D300 and compared the weight, I then realized this new camera while lighter was also going to be a FF with a lot higher ISO capability similar to the D4, which meant more hand held shots without the need for a flash, has a battery which allows 1400 shots (again, less weight in the bag) and uses less expensive SD cards. That clinched it for me. For the rest of the trip I popped the 50 on the body and used the Df. I took out the other lens, extra battery and memory cards and was very happy with the lighter bag, light weight around my neck and no more back pain.
The D700 has more pro features that the Df do not have which is something to consider as well however, to me, as a FF camera for travel I much prefer it to all the other Nikon offering. The lighter weight means I can have it with me more often than I would the D300. If you have not yet checked out the Df, you should. You might be tempted to add that to your bag. No one can say if it will be for you or not, you ill decide once you have spent some time with it. I eventually got mime after handling it at 6 different shops in Hong Kong over a few hours. I am happy with my decision.
. Hopefully, the rubber will stay put. In SE Asia my body and lenses spend a lot of time around salt water. Weather sealing and good glue is critical for travel cameras.
