I have a 700 mm focal and 76 mm aperture telescope. I bought it a few days ago. I tried to spot Mars for 3 days but I only see red light. I use an 20 mm eyepiece for finding it and 4 mm eyepiece for seeing but only red light is visible. Please help me.
Mmm... it's a pretty small scope using a fairly high power. The disc of Mars is not going to be very large (just a few seconds of arc across) so I don't think you should expect to see something that looks like a HST image! Mars is pretty red as a rule, so 'red light' is what you should be seeing because the disc is too small to show much detail.