Case Logic DSLR Quick Sling
The Case Logic DSLR Quick Sling is the sling I use mainly on my operational and recreational cameras. This sling enables me to sling my camera to the side and quickly transition to another camera if needed. This greatly enables me to use my D7100 for as my main camera but quickly transition to another DSLR with a smaller zoom lens to take close in photographs in my side mirror, if the situation presents itself.
This particular quick sling attaches to the bottom of most DSLR cameras by screwing into the tripod mount. The camera then can easily be adjusted along the sling for unrestricted use.
Overall, I recommend this camera strap for daily and operational use.