Takahashi · Refractor · Up to 4 inches · 2000 on (now discontinued)
Takahashi launched the Sky90 in November 2000, after showing it earlier that year as the FCL90. It's a 90 mm fluorite doublet with a 500 mm focal length at f/5.6, the fluorite element in front, in a short tube of about 3.2 kg with its finder. That made it a fast, portable tube for wide-field photography and a sharp, compact one for looking. An Extender-Q stretches it to 800 mm for the Moon and planets, and a flat reducer takes it to 407 mm at f/4.5 for big star fields. Takahashi has since discontinued it, so used ones are the only way to get one, and the extender and reducer are just as hard to find as the tube.
The full kit
Check the listing photos against this list, and ask the seller about anything you can’t see. Plenty of listings are the tube alone or the mount alone, and a missing hand controller, power supply or counterweight should come off the price.
The fluorite front element needs checking for scratches and cleaning marks. It's discontinued, so the extender, reducer and adapters can't simply be bought new, and listings without them are worth less.
New to used telescopes? How to check a used telescope covers optics, mounts, power and shipping, and what a complete kit looks like helps with tube-only and mount-only listings.
Buying guide
Only two Sky90s are for sale, so the $1,575–1,675 band isn't a market read. We'd look at the $1,550 delivered tube from a 100% seller in Japan, $350 of that shipping, whose photo shows the finder and a lens cap; ask about import fees and how long it will take. The other is $1,694 delivered and titled with a tripod, but it's from a zero-feedback seller and the photo shows no tripod, so we'd pass. Neither titles the Extender-Q or the reducer, which are as hard to find as the tube now that it's discontinued. Ask for a flashlight photo into the fluorite front lens before you pay.
$1,549.99est. delivered
The lower of two asks, $1,550 delivered from a 100% seller in Japan, $350 of it shipping. The photo shows the tube with its finder and a lens cap; ask about import fees.
Takahashi SKY90 90mm F=500mm Fluorite Astronomical Telescope
Delivered prices include shipping as eBay quoted it to a US address on Oct 14, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 14, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used$1,549.99est. delivered
$1,199.99 + $350.00 shipping
Buy It Now$1,199.99
Good buy
Tube with finder, from Japan. $350 shipping; ask about import fees.
Seller: tropical-ninja
100% positive
Used$1,694.00est. delivered
$1,399.00 + $295.00 shipping
Buy It Now$1,399.00
This seller takes offers, and many sellers accept less than the asking price.
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Check the seller
Zero-feedback seller. Titled with a tripod, but the photo shows none.
Seller: awe-some-indeed
No feedback yet
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