Sirius Painter 102DL, DS, which one is better, astronomical telescope

It must be the 102DL. The chromatic aberration control at telephoto is much better than that of the 102DS at short focal length.

For the same level of refraction, the chromatic aberration control is always better at the telephoto ratio than at the short focal length. But

If you really want to shoot birds, you should buy an automatic lens

I really want to shoot planets, but this caliber is not enough

I really want to shoot nebulae, the color difference between the two is huge It is larger, and the focal ratio is also larger

Comparing the two, according to the demand, the typical 102DL is stronger