ZWO’s two best-selling starter models go head to head: the Seestar S30 (€349) and the Seestar S50 (€549). A €200 gap — but what do you really gain? Here’s the match-up.
The key difference: aperture
The S50 has a 50 mm aperture (250 mm focal length), versus 30 mm (150 mm focal length) for the S30. More aperture means more light captured and more detail on faint deep-sky objects. The S50 therefore goes further, faster.
Weight and portability
The S30 is lighter and more compact (1.65 kg), while the S50 weighs about 3 kg. For ultra-portable use or as a gift for a beginner, the S30 is unbeatable on lightness and price.
Field of view
With its shorter focal length, the S30 offers a wider field — handy for large nebulae and clusters. The tighter S50 frames small targets more closely.
The verdict
Get the Seestar S30 if you’re on a tight budget, want maximum lightness, or for a first “discovery” device.
Get the Seestar S50 if you want to go further into deep sky from the start: it’s the best value to progress, and still very accessible.
👉 See detailed specs and prices on our comparator, or let the configurator decide for you.
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