T7i Lens for Astronomical Photos

[TMike]

I have the 75-300, 1:4-5.6 III.  I get good pictures of the moon, I have a difficult focusing on Jupiter and Saturn, especially with screen.  I am looking at a faster lens.  However, not sure what the limitations of the camera might restrict choices.  I have experimented with the manual settings without satisfactory results.

Looking for Lens recommendations or am I expecting too much for this camera?

Is the 75-200, 2.8 overkill for the T7?

Thanks for you advice!

[kvbarkley]

Not quite points with a 600mm lens and crop frame with 24 MPixels (T6S)

[AtticusLake]

That is an excellent one of Saturn.  is the other Jupiter?  Looks maybe overexposed - I would expect to see the cloud bands.

[kvbarkley]

The other is jupiter during the recent conjunction. It was tough getting them both exposed correctly at the same time.