1. Úvod
This manual provides essential instructions for the proper setup, operation, and maintenance of your Explore Scientific FCD100 Series 127mm f/7.5 Carbon Fiber Triplet ED APO Refractor Telescope. This high-performance instrument features an air-spaced triplet optical design with HOYA FCD100 extra-low dispersion (ED) glass, a lightweight carbon fiber tube, and a robust 2.5-inch HEX focuser, designed for exceptional astronomical observation and astrophotography.
Please read this manual thoroughly before using your telescope to ensure optimal performance and longevity.

Figure 1.1: Explore Scientific FCD100 Series 127mm Carbon Fiber Refractor Telescope.
2. Bezpečnostní informace
- Nikdy se nedívejte přímo na Slunce dalekohledem ani jeho hledáčkem bez profesionálně vyrobeného slunečního filtru. Může dojít k trvalému a nevratnému poškození očí, včetně slepoty.
- Při používání dalekohledu vždy dohlížejte na děti.
- S optickými součástmi zacházejte opatrně, abyste předešli poškrábání nebo poškození.
- Ujistěte se, že je dalekohled bezpečně upevněn na stabilním stativu nebo montáži, aby nedošlo k jeho náhodnému pádu.
- Avoid exposing the telescope to extreme temperatures or sudden temperature changes.
3. Obsah balení
Ověřte, zda jsou v balení přítomny všechny níže uvedené komponenty:
- Explore Scientific FCD100 Series 127mm f/7.5 Carbon Fiber Triplet ED APO Refractor Telescope Optical Tube Assembly (OTA)
- Integrated Dew Shield
- 2.5-inch HEX Focuser
- Two Focuser Extension Tubes
- Cradle Ring with Handle
- Vixen-Style Dovetail Plate
- Explore Scientific 2N1 Finder Scope Base (installed on OTA)
- 99% Reflective 2-inch Diagonal

Figure 3.1: Included 2-inch Diagonal and Focuser Extension Tubes.
4. Identifikace součásti
Familiarize yourself with the main parts of your telescope:
- Objektiv: The large lens at the front of the telescope, composed of a triplet ED APO design with HOYA FCD100 glass for superior chromatic aberration correction.
- Rosný štít: Extends from the front of the telescope to protect the objective lens from dew formation and stray light.
- Carbon Fiber Optical Tube: The main body of the telescope, constructed from lightweight and thermally stable carbon fiber.
- Cradle Rings and Handle: Used to secure the optical tube to a mount and provide a convenient carrying handle.
- Vixen-Style Dovetail Plate: Attached to the cradle rings, this plate allows the telescope to be mounted onto compatible equatorial or alt-azimuth mounts.
- 2.5-inch HEX Focuser: A robust focusing mechanism designed for precise adjustments and capable of supporting heavy accessories.
- Finder Scope Base: A mounting point for an optional finder scope, which aids in locating celestial objects.
- Úhlopříčka: An optical accessory that redirects the light path at a 90-degree angle, providing a more comfortable viewing pozice.

Obrázek 4.1: Přesview of the telescope assembly.

Figure 4.2: Detail of the objective lens with FCD100 glass.

Figure 4.3: The 2.5-inch HEX Focuser for precise adjustments.

Figure 4.4: The installed 2N1 Finder Scope Base.
5. Nastavení
Follow these steps to set up your telescope for observation:
- Montáž dalekohledu: Secure the Vixen-style dovetail plate (attached to the cradle rings) into the saddle of your compatible equatorial mount. Ensure all clampjsou utažené, aby se zabránilo pohybu.
- Připevnění diagonály: Insert the 2-inch diagonal into the focuser drawtube. Secure it by tightening the thumbscrew(s) on the focuser.
- Vložení okuláru: Insert your desired 2-inch eyepiece into the diagonal. If using a 1.25-inch eyepiece, you will need a 2-inch to 1.25-inch adapter (not included). Secure the eyepiece with the diagonal's thumbscrew(s).
- Attaching a Finder Scope (Optional): If you have a compatible finder scope, attach it to the pre-installed 2N1 finder scope base. Align the finder scope with the main telescope by pointing the main telescope at a distant terrestrial object and then adjusting the finder scope until the object is centered in both the finder and the main eyepiece.
- Extending the Dew Shield: Gently slide the integrated dew shield forward until it is fully extended.
6. Obsluha dalekohledu
Jakmile je sestaveno, můžete začít pozorovat:
- Nasměrování dalekohledu: Use your mount's controls to point the telescope towards your desired celestial object. The finder scope, if installed and aligned, will help you quickly locate objects.
- Zaměření: Look through the eyepiece and slowly turn the focuser knobs (coarse and fine adjustment) until the image appears sharp. Start with a low-power eyepiece (higher focal length) for easier focusing.
- Změna zvětšení: To change magnification, swap eyepieces. Lower focal length eyepieces provide higher magnification. Always refocus after changing eyepieces.
- Sledování objektů: As the Earth rotates, celestial objects will drift out of view. If using an equatorial mount, you can track objects by adjusting the right ascension axis, often with a motor drive (if equipped).
7. Údržba
Proper care will ensure your telescope remains in excellent condition:
- Čištění optiky: Dust on the objective lens is normal and rarely affects performance. If cleaning is necessary, use a soft brush or compressed air to remove loose particles. For stubborn smudges, use a specialized optical cleaning solution and lens tissue, applying minimal pressure. Avoid touching optical surfaces with bare hands.
- Čištění trubice: Wipe the carbon fiber tube with a soft, damp tkanina. Vyhněte se abrazivním čisticím prostředkům.
- Skladování: Store the telescope in a clean, dry, and dust-free environment. Keep the objective lens cap on when not in use.
- Focuser Maintenance: The 2.5-inch HEX focuser is designed for durability. If it becomes stiff or loose, consult the manufacturer's support for guidance; do not attempt to disassemble it yourself.
8. Řešení problémů
| Problém | Možná příčina | Řešení |
|---|---|---|
| Obraz je rozmazaný nebo nezaostřený. | Incorrect focuser position; atmospheric conditions. | Adjust the focuser slowly. Allow telescope to equalize with ambient temperature. |
| Není viditelný žádný obraz. | Lens caps on; incorrect eyepiece; object not in field of view. | Remove all lens caps. Ensure an eyepiece is inserted. Use the finder scope to locate the object. |
| Obraz se jeví matný. | High magnification eyepiece; light pollution. | Use a lower magnification eyepiece. Observe from a darker location. |
| Stars appear as streaks. | Mount not tracking; mount not polar aligned (for equatorial mounts). | Ensure tracking is engaged. Perform accurate polar alignment for astrophotography. |
9. Specifikace
- Číslo modelu: FCD100-127075-CF-01
- Optický design: Air-Spaced Triplet ED APO Refractor
- Průměr objektivu: 127 mm
- Ohnisková vzdálenost: 952 mm
- Ohniskový poměr: f/7.5
- ED Glass Type: HOYA FCD100
- Rezoluce: 0.9 oblouky
- Limiting Magnitude: 13
- Zaměřovač: 2.5-inch HEX Focuser (Manual Focus)
- Optical Tube Material: Uhlíkové vlákno
- Popis držáku dalekohledu: Equatorial Mount (requires compatible mount)
- Hledáček: Reflex (base installed, finder scope not included)
- Rozměry produktu: 33.25 x 33.25 x 33.25 cm (přibližné přepravní rozměry)
- Hmotnost položky: 14 libry
Optical Performance Data

Figure 9.1: Optical Spot Diagram illustrating performance.

Figure 9.2: Optical properties of HOYA FCD100 glass.
10. Záruka a podpora
For warranty information, technical support, or service inquiries, please contact Explore Scientific directly. Refer to the official Explore Scientific webNejnovější kontaktní údaje a záruční podmínky naleznete na webových stránkách nebo v dokumentaci k nákupu.
It is recommended to register your product with Explore Scientific to facilitate any future support needs.