I want to see Jupiter with moon. So am planning to build telescope. Can I use 75mm Plano convex lens with 1000mm focal length?
Can I use 75mm Plano convex lens with 1000mm focal length
tl;dr: Go for it!
First see this answer to Will these simple 2 convex lens arrangement telescope see the moon clearly? but your question is quite different, not a duplicate and I think you can have some success!
- How does making a refracting telescope very long reduce the chromatic aberration of an uncorrected lens?
In fact it's probably time that get answered so I've added a bounty, and if nobody answers it after that then I will!
Yes, please carry out your experiment! With a 75mm plano convex lens with a 1000 mm focal length, you will have a low quality image due to chromatic aberration but with a good eyepiece and stable way to hold it at the objective lens' focal plane (that's not easy!) you will be able to catch a glimpse of Jupiter's Galilean moons and probably see some bands of clouds.
They will not be clear, the image won't be stunning, but it will be very exciting to DIY yourself all the way to Jupiter for a few moments!