TS-Optics Imaging Star APO Refractor - 100 (Triplet)
TS-Optics Imaging Star APO Refractor - 100 (Triplet)
TS-Optics Imaging Star APO Refractor - 100 (Triplet)
TS-Optics Imaging Star APO Refractor - 100 (Triplet)
TS-Optics Imaging Star APO Refractor - 100 (Triplet)
TS-Optics Imaging Star APO Refractor - 100 (Triplet)

TS-Optics Imaging Star APO Refractor - 100 (Triplet)


Regular price$3,370.00
(Including VAT)

TSQ-100ED Quadruplet APO comes with a permanently built-in field corrector.
The 100 mm f/5.8 quadruplet from the TS Imaging Star line is highly respected by professional astrophotographers around the world.

The telescope is an interesting alternative to the Takahashi FSQ-106ED and due to the air-spaced FPL53 objective, the image is free from chromatic aberration and provides outstanding image contrast. Through the integrated corrector the field is also perfectly flattened and you will get perfect stars in the field right to the edge.

Although this APO is optimized for Astrophotography, it also offers very good performance visually. The stars are pinpoint and are visible without any chromatic correction. The image stays sharp with exceptional contrast right up to 300x magnification.

The photographic 4" Rack & Pinion focuser:
The CNC focuser is optimized for astrophotography and can handle a payload of up to 6kg and the travel of the focuser tube is carried out via rack and pinion. The construction of the drawer is similar to the Starlight Feather Touch and the mechanical stability comes very close to that of the Starlight Feather Touch as well. In addition to 2" and 1.25" receptacles, an M78x1 thread is also available for screw adaptations.

Features and advantages:

  • Excellent FPL53 triplet objective (glass from Ohara, Japan)
  • Integrated flattener with factory-set optimized distance to the objective for optimal sharpness in the field
  • 4" CNC rack and pinion focuser with male M82x1 Connection thread - payload up to 6kg
  • The system is free from annoying reflections
  • Objective and corrector are adjustable - but are already delivered optimally factory adjusted
  • Each quadruplet APO is also checked by engineers before shipping and the optical system is also tested
Before you receive your TS Imaging Star 100 APO:
Every single TS Imaging Star 100 APO is checked in the TS Optics technical department before its put into storage, in order to guarantee a consistently high product quality.
  1. The mechanics are tested, the focuser is optimally adjusted.
  2. The objective is cosmetically checked and cleaned. In addition, it is checked to make sure all counter screws are correctly tightened. Often these become loose during transport.
  3. The optics are collimated and the results are verified on the optical bench.
  4. Only then are the telescopes transferred to the warehouse and prepared for shipment.
Technical Details:
  • Design: APO Triplet Refractor
  • Aperture: 100 mm
  • Focal length: 580 mm
  • Focal ratio: f/5.8
  • Objective: Air-spaced triplet objective
  • Field corrector: Single lens field corrector system
  • Corrected and fully illuminated field: 49 mm
  • Back Focus from 2" connection: 98.5 mm - inner draw tube position
  • Drawtube travel: 40 mm
  • Clear aperture: 90 mm with anti-reflex thread
  • Connections on the eyepiece site: M82x1 female (draw tube) / male (gender changed by rotator) and 2" connection
  • Connections on tilter: M82x1 female at telescope side, M82x1 male at eyepiece side
  • Fine focusing: 1/10 micro transmission
  • Maximum photographic load: 6 kg
  • Tube: Painted ultra black inside - length 490 mm (19.25") with retracted dew shield
  • Dew shield diameter: 140 mm
  • Weight: only 5.3 kg (10.8 pounds)
  • Weight of the case: 3.5 kg (7.7 pounds)
  • Size of the case: 615 mm x 260 mm x 220 mm
Whats included:
  1. 100 mm f/5.8 quadruplet flatfield apochromat
  2. 4" rack-and-pinion focuser with finder shoe
  3. CNC rings
  4. Transport case


Please Note: Items in stock and ready for dispatch immediately are usually delivered within 24 - 72hrs. We always try to offer the quickest possible delivery so items may be sent directly from either our Dublin or our Munich location, depending on stock availability. If an item is a 'Special Order Item' it will require additional lead time before being dispatched eg. 5 - 10 Working days - This will be highlighted on the product page before purchase.

All orders are shipped using our reputable courier partners to ensure your items arrive safely and promptly. While we do offer International Delivery, we are unable to ship large Telescopes and Mounts outside of Ireland.



Est. Delivery Time after Dispatch:
24 - 72 hrs

Standard Tracked Delivery:
Ireland Nationwide: from €9.95

Note: Larger telescopes which contain multiple boxes include an additional surcharge. Shipping is calculated automatically at the checkout.





Est. Delivery Time after Dispatch:
24 - 72 hrs

Standard Tracked Delivery:
Norther Ireland: from €19.50+

Additional Info:

Standard Express Shipping rate applies up to a max order weight of 30kg Nationwide. - Large heavy items from 30kg+ include an additional surcharge, depending on the overall weight.

Unfortunately due to Brexit we are currently unable to ship to Mainland UK at this time. 


Est. Delivery Time after Dispatch:
24 - 72 hrs

Standard Tracked Delivery:
European Union: from €18.95+

Shipping available for items up to a max order total weight or volumetric weight of 27kg.

Additional Info:

If your country is not listed below please contact us for more information.

Standard EU Delivery Regions:
Germany, France, Belgium, Poland, Luxumbourg, Netherlands, Sweden, Denmark, Portugal, Spain, Austria, Italy, Poland, Czech Republic, Croatia, Malta, Greece


Est. Delivery Time after Dispatch:
48 - 72 hrs

Standard Tracked Delivery:
US & Canada: from €28.50+

Shipping service available for items up to a max order total weight or volumetric weight of 20kg.

Additional Info:

 * Customs / Import duties may apply in these regions. For more information please contact your local tax/customs office.

: Its essential that when placing an order, you include a valid 'Contact Telephone Number' for the delivery address or for the person receiving the item. This is necessary to avoid potential delays or problems with your delivery.

Please Note: Delivery times listed above are estimated. These are calculated from when your order is Completed & Dispatched (not from when the order is placed) and times may also vary for some remote post codes. Delivery service takes place Mon-Fri (excl. Bank/Public Holidays).

Shipping Disclaimer: All of our parcels are sent via a 3rd party registered courier service to ensure safe and prompt delivery. While we endeavor to ensure that all parcels are delivered within the specified time frame, 'Horizon Astronomy' can not be held responsible for delays due to adverse weather conditions or other courier/technical related issues outside of our control.

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