[Refurbished] Pleiades 68 Astrograph

Pleiades 68，專業級天文攝影的最佳選擇。

使用 7 元件成像 APO 望遠鏡，體驗無與倫比的清晰度和精確度。這款最先進的望遠鏡專為充滿熱情的天文攝影師而設計，是 WIFD 系列的主打新星，提供您無可挑剔的清晰宇宙影像。

獨家設計：

• 精密光學：先進的 7 元件光學系統可產生清晰、鮮豔的影像，同時最大限度地減少色差。
• 針對快速、精細的成像進行了最佳化： 憑藉 f/3.8 大光圈可在更短的曝光時間內拍攝更精細的深空成像。
• 適用於各種成像系統：配備 48 毫米和 54 毫米轉接環，確保與各種 CCD 和 DSLR 相機相容。
• WIFD 系列卓越性：搭載專利 WIFD 調焦系統，實現我們對卓越天文攝影設備的承諾。

When deciding on the ideal William Optics refractor for your astrophotography needs, it's essential to understand the key features and performance factors that differentiate the RedCat 71 APO and Pleiades 68 APO. Both telescopes offer excellent imaging capabilities, but specific characteristics make each suitable for different user preferences and skill levels.

WO Pleiades 68 Astrograph f/3.8

The Pleiades 68 boasts an advanced 7-element optical design, delivering apochromatic pinpoint stars with a fast focal ratio of f/3.8. Its 260mm focal length provides an expansive field of view and a shallow depth of field, requiring precise camera spacing for optimal focus. The recommended backfocus is precisely 55mm, and maintaining this exact spacing is crucial for peak performance. The flat field image is 48mm in diameter and includes M48 and M54 camera adapters.

The WO Internal Focus Design, compatible with an Electronic Automatic Focuser (EAF - not included), features a patented center focuser with a precision 10:1 fine adjustment knob and a built-in thermometer. The sliding dew shield with a thumbscrew lock includes a super bright Bahtinov mask within the removable dust cover. Mounting rings, a saddle handlebar, and a vixen-style doveplate are included.

The more precise spacing requirements of the Pleiades 68 cater to advanced or expert users willing to invest extra time and effort in fine-tuning the spacing based on their chosen camera options.

William Optics RedCat 71

The RedCat 71 features a unique 4-element Petzval apochromatic optical design with a fast focal ratio of f/4.9. Its 350mm focal length provides a wide field of view and more depth of field compared to the Pleiades 68. The flat field image is 45mm in diameter, and this model is more forgiving in terms of camera spacing criticality. It includes a built-in filter area threaded for a single filter, if desired.

The RedCat 71 comes with the WO Internal Focus Design (WIFD), incorporating the patented WO center focuser with precise internal sliding of fixed optics to prevent image shift. The integrated position viewing window on the focuser provides instant verification of the graduated numerical display. The smooth rack and pinion design in the focuser offer super fine adjustability for critical focus. The dew shield is a fixed position design, removable for storage, and includes a super bright Bahtinov mask within the removable dust cover. Mounting rings, a saddle handlebar, and a vixen-style doveplate are included.

The RedCat 71 stands out for its ease of use, making it an appealing choice for users looking for a user-friendly astrophotography experience.

In summary, your choice between the Pleiades 68 and RedCat 71 will depend on your level of expertise, preferences in terms of ease of use, and specific astrophotography requirements. Each telescope offers distinct advantages, catering to a range of user needs in the pursuit of stunning celestial images.