what magnification is required to see jupiter, saturn, venus and mars with a 50mm refractor scope with f/12 ratio and 600mm focal lenth i have a beginner telescope of 50mm and want to see planets it is arefractor with f/12 ratio and two eyepieces of 5mm and 10mm and i want to see mars, Jupiter, Saturn and venus. my max zoom ix 120x and focal length is 600mm
Venus, Mars, Jupiter, and Saturn are visible with your eyes, so a telescope and magnification are not required to see them. Depending on the quality of the telescope, the magnification will show you some details.
Venus - you will be able to see the phase.
Mars - for several months every 26 months, you will be able to see some dark markings and a polar cap.
Jupiter - you will see the cloud bands and 4 of its moons.
Saturn - you will see its rings and moon Titan.

Enjoy the view!