By tracking I mean the mount needs to be tracking. Doesn’t need to be guided. The mount should be able to track well enough to keep a star/planet in the FOV for a short while without intervention. Don’t over complicate it with guiding
Yeah so that image was captured at ~5000mm, maybe slightly higher. The beauty of a classic Barlow is that you can vary the spacing from the lens to get a different multiplication factor. The Edge 11 is 2800mm native.
Even cheap Barlows can be pretty decent these days, as maybe is demonstrated in the image
Planetary/guide camera sensors are so small that they’re really only using the centre of the glass. You might notice more aberrations with a low power eyepiece, compared with a Powermate say, but if you don’t need the wider FOV, it doesn’t matter. Planets are very small relative to the telescope’s FOV.