Skywatcher drawtubes are different lengths. Who knew?

I have a focuser I’m unhappy with that I wish to upgrade when I can find a replacement I’m happy with, but as a stock Skywatcher R&P focuser came up for very little money I bought it to use in the meantime.

I was surprised when it arrived to discover that the drawtube was considerably longer than one I already have (badly damaged in transit on another OTA):

It turns out that the one on the left is typically fitted to shorter tube refractors whereas the new one on the right tends to be on longer focal length OTAs such as the Evostar range.

As it happens, I want to put it on a fairly short focal length refractor, but the long drawtube is quite useful as it means I may not need extensions to get a camera to reach focus.

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