tl;dr Is there a celestial object which has details that can be seen clearly by a 70mm telescope, but no details at all seen by a 50mm telescope of the same make. E.g. "Jupiter has details that can be seen clearly by a 70 which are its stripes, while no details can be seen clearly by a 50".
I was wondering if what my search gathered is correct.
From what I've gathered from forums etc. it seems like despite different opinions (as in other things), if one is looking to see details that can't be seen with the naked eye, not including fuzzy shapes, there are exactly 3 things that can be seen with a cheap telescope clearly:
- More details on the moon.
- Details on Jupiter.
- Details and rings of Saturn.
Nothing more nothing less. (And specifically, no Deep Space Objects at all.)
And the difference between a 50mm one or a 70mm one would only be the size it would look.
Remember we're not talking about seeing a fuzzy shape of nebulae as opposed to a dot in the sky, only things that would look clear, albeit small. And that some detail will be added by the telescope, so just seeing Jupiter's moons as dots as opposed to not seeing them at all, doesn't count. I'm also assuming whatever would be a "logical" magnification with simple eyepieces.
Obviously more will be seen with a 70mm than a 50mm. I'm asking if there is an object which will have details seen clearly by a 70 and no details at all seen clearly by a 50. If you answer yes, please say which object. E.g. A 70 will be able to see clear stripes on Jupiter while a 50 will only see a blob.
If you absolutely need a specific type of telescope, let's look at this one: