Lets say I have a 17-70mm lens that has a F2.8-F4.5 rating, will I be able to do bokeh shots on a APS-C Sensor? How about at 50MM F4? Could bokeh be archive witout zooming to the most telephoto end? Thanks.:embrass:
As Cartman2000 has already said in very simple terms, get your background far away and your subject as close to you as possible.You can even do this even with your wide end of your lens (17mm f2.8).While having a larger FF sensor helps in subject isolation, you can still get good results with a crop body.