Without tracking you’ll be limited to planetary imaging (cheapest camera option) or deep space objects of very limited exposure length (most probably 10 seconds or less) before the stars start to trail in your images.
If you already own a DSLR, a very cheap option is simply a T2 Adapter to fit the camera onto the scope with – Canon EOS T2 Adapter etc (can be bought from AstroNZ)…you can then stack these short exposures for surprising results given you’ll not be tracking the objects.