Hi Misha,
I suspect there's a SkyWatcher 150mm reflector with a longer tube that's not sold by Bintel. The 'S' model is just the F/5 version they do sell.
I'd be keen to hear what you think of the EQ3-2 with this scope. I have the older EQ3 and while it's absolutely fine for visual use, it's hopeless for astrophotography.
Best wishes,
Cam
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