I have the camera bodies of a Sony Nex 3N and Nex 5, along with two extra lenses. I have the F 28mm F2 and the F 4.5-6.3 OSS. I have noticed that it is terrible with shooting inside, in low lit situations. I am new with photography and am still working on understanding manual mode, so I choose to use auto for now. Is there a lens that allows more light for indoor photos? Is it the camera itself? I have considered getting a DSLR but do not have the funds right now. Any thoughts??