Hi Pravin, the short answer is...any telescope and any camera! As you increase the quality (and therefore cost) of either instrument the quality of your images will increase as well. If you are asking what you should get to advance in the hobby, I would need to ask what type of objects do you wish to image and what is your budget. I for instance, tend to image large bright nebula. So I have a small short focal length quality refractor (102mm ED Triplet approx $1000US) and an entry level CCD (approx $2000US)...but do not forget one of the most important pieces of equipment you did not mention...a mount. I have the Orion Sirius Goto mount. So I guess the question is my friend...what do you hope to image? My advice...look around this site....look for images that are similar to what you hope to achieve and see what they used to take those images. Feel free to ask questions, everyone here is friendly.