Starfield Optics ED102mm F/7 APO Doublet Telescope: Superior Performance for Astronomy and Astrophotography

Advanced Optical Design: Features an FPL53 (Ohara, Japan) and a Lanthanum element for exceptional chromatic correction, rivaling more expensive triplets.
Versatile Astronomy Use: Ideal for both imaging and visual astronomy, providing color-free images and views at high magnifications.
Fast Cooling Advantage: Benefits from a shorter cooling time compared to triplet lenses, allowing quicker operation.
High-Quality Build: Includes a 2.5" two-speed rack and pinion focuser with ball bearings, fully rotatable for ease of use.
Heavy Load Support: Designed to support heavy camera loads and accessories, thanks to its robust construction and self-centering rotational lock.
Eyepiece Compatibility: Accommodates both 2" and 1.25" eyepiece accessories, enhancing versatility.
Durable Construction: Features HD CNC tube rings and a Vixen-style dovetail bar for secure mounting.
Transport-Friendly Design: Equipped with a retractable dew shield, reducing the total length to 24” for easy transport.
Optimized for Contrast and Clarity: Internally baffled to prevent stray light, ensuring the high contrast expected from performance refractors.
Specifications: Offers an aperture of 102 mm, focal length of 714 mm, and a focal ratio of f/7, making it a powerful tool for lunar, solar system observation, and demanding astrophotography applications.

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Specifications

Optical Design: Apochromatic Doublet.
Aperture: 102 mm.
Focal Length: 714 mm.
Focal Ratio: f/7.
Optical Elements: Uses FPL53 (Ohara, Japan) and a Lanthanum element for advanced chromatic correction.
Cooling Time: Faster cooling compared to triplet lenses, allowing for quicker operation.
Color Correction: Provides images free of chromatic errors; maintains color-free views even at high magnifications.
Focuser: 2.5" two-speed rack and pinion focuser with ball bearings, fully rotatable.
Focus Adjustment: Optional motor focusers can be installed.
Focuser Lock: Self-centering rotational lock without setscrews.
Load Capacity: Supports heavy camera loads and accessories.
Eyepiece Compatibility: Accommodates both 2" and 1.25" eyepiece accessories.
Construction: HD CNC tube rings and Vixen style dovetail bar.
Dew Shield: Retractable for easy transport, reducing the total length to 26” when retracted.
Internal Baffling: Internally baffled to prevent stray light and enhance contrast.
Application: Suitable for lunar, solar system observation, and demanding astrophotography.
Portability: Designed for ease of transport with a retractable dew shield.