How can you fairly compare one telescope to another? It's all in the (angular) resolution. The entire point of introducing telescopes into astronomy is to make distant things more visible.

Just how powerful is the world's most powerful telescope? Let's start with the human eye. The human eye has an angular resolution of about 1 arcminute. That's pretty impressive. Take a circle ...

1a). As the diameter of a telescope's mirror increases, so does the angular resolution (the ability to discern fine detail). But the blurring effect of the Earth's atmosphere means that the finest ...

According to the widely accepted Rayleigh criterion, in order to resolve two distant point sources, their angular separation must be larger than 1.22 (the wavelength of light divided by the ...

The first of the resulting improvements is the dramatic increase in a telescope’s resolution—the smallest angular separation that can be reliably detected (Fig. 2). Images taken with the HST ...

In our solar system, scattered across one of Earth's verdant mountains, six eggshell-white telescopes gaze ... the project's image resolution — specifically, angular resolution — is excellent.