Takahashi · Refractor · Up to 4 inches
Takahashi FC-100D
The first Takahashi FC-100 came out in 1981, and the FC-100D family brought that 4-inch fluorite design back in several versions. The DC and DF share a 100 mm, 740 mm f/7.4 objective with the fluorite element at the back, behind an ordinary glass front lens. The DC is the light visual tube with a compact focuser, and the DF has a bigger focuser and a shorter tube for cameras. The DL was a 900 mm f/9 limited edition from 2015 that sold out by 2018, and the DZ arrived in 2019 with a new 800 mm f/8 objective. All of them are light enough for a modest mount, and a 4-inch fluorite apo shows the Moon and planets with almost no false color. Check the letter after the name, because the versions differ.
FC-100DC (visual, lightest)FC-100DF (imaging)FC-100DZ (2019, 800 mm)FC-100DL (2015 limited edition, 900 mm)
Spec at a glance
- Brand
- Takahashi
- Type
- Refractor
- Aperture
- 100 mm (4 in)
- Focal length
- 740 mm (DC, DF); 800 mm (DZ); 900 mm (DL)
- Focal ratio
- f/7.4 (DC, DF); f/8 (DZ); f/9 (DL)
- Design
- Air-spaced fluorite doublet apochromat
- Focuser
- Rack and pinion (compact on the DC, 2.7 in on the DF and DL)
- Weight
- 2.8 kg (DC) to 3.9 kg (DZ)
- Also listed as
- FC-100DC, FC-100DF, FC-100DZ, FC-100DL, Tak FC-100
- Typical eBay ask (Oct 14, 2026)
- $6,300–$7,250
The full kit
What should come with it
- Tube with dew shield and lens cap
- Finder (optional on the DC, a 6x30 on the DZ and DL)
- Tube rings or holder and a dovetail for your mount
- Visual adapters for a diagonal and eyepieces
- Any reducer or flattener the listing claims
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.
What to check
The listing title often says FC-100D without the last letter, and the versions differ in focal length and focuser. The lens and focuser are well made, so condition comes down to care. Adapters and finders go missing.
- 01Version: Read the engraving on the tube to see which FC-100D it is. It should say DC, DF, DZ or DL, and match the listing.
- 02Lens: Ask for a photo into the objective with a flashlight from the side. It should be clear, with no haze, fungus or scratches.
- 03Focuser: Ask the seller to rack the focuser in and out with a diagonal fitted. It should move smoothly and not slip.
- 04Mounting: Check for tube rings or a holder and a dovetail in the photos. The tube needs one that fits your mount.
- 05Accessories: List the finder, adapters, reducer or flattener the listing claims. Each should be in the photos.
- 06Packing: Ask how it will be packed. Good is a hard case or a double box with the lens capped.
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
Which one to buy
§ Oct 14, 2026Both FC-100D listings are FC-100DF sets on a Vixen SX2WL mount with accessories, so the price includes the mount, at $5,857 and $7,698 with free shipping from Japan. Two listings aren't a market read, and both show the identical photo, so at least one seller is using someone else's picture, and we wouldn't buy either until the seller sends fresh photos, including the tube's engraving reading FC-100DF. Ask for a flashlight photo into the objective and a list of the accessories the title mentions. Japan runs on 100 V, so ask what power supply comes with the SX2WL, and allow for import fees and a long shipping time.
- Listed now
- 2
- For parts
- 0
- Typical ask
- $6,300–$7,250
- Full range
- $5,857–$7,698
Snapshot
For sale on eBay
2 of 2 listedChecked . 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- Check the seller
Takahashi FC-100DF Refractor Telescope Set w/ SX2WL Mount & Accessories
$5,857.00delivered
$5,857.00 · free shipping
Buy It Now$5,857.00
Offers accepted
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
FC-100DF set with an SX2WL mount, from Japan. Another seller uses the same photo; ask for fresh ones.
Seller: tk.shop.1986
99.7% positive
Used- Check the seller
Takahashi FC-100DF Refractor Telescope Set w/ SX2WL Mount & Accessories MINT
$7,698.00delivered
$7,698.00 · free shipping
Buy It Now$7,698.00
Check the seller
Same photo as the $5,857 set, titled MINT, at $1,841 more. 98.6% seller.
Seller: oniku_99
98.6% positive
Prices change daily. The live eBay search shows everything listed now, including anything new since Oct 14, 2026.
See every listing on eBay ↗eBay searchCompare with
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Specs and what to check →