Svbony SV503 Telescope 70 mm Quadruplet ED OTA Refractor for Astronomy (SKU: F9359E) Telescopes opinie

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The SVBONY SV503 70mm f/6.78 Quadruplet ED Telescope (SKU: F9359E) is an apochromatic refractor with built-in flatness correction, designed for astrophotography with APS-C cameras. The 70mm diameter, 474mm focal length lens consists of four elements – including FPL51 glass and lanthanum glass – which minimizes chromatic aberration and provides high color fidelity and image sharpness to the edges of the frame.

Key Features

• 4-element ED lens with built-in field corrector (Flatfield)
• FPL51 glass and lanthanum glass reducing chromatic dispersion
• built-in 2-element equalizer – flat image field with a diameter of 32 mm
• f/6.78 aperture for a bright and contrasting image
• 2.5" RAP focuser with 1:10 microfocus and 2"–1.25" adapter
• M54 × 0.75 thread for direct camera mounting
• extendable and retractable sun visor – protects against scattered light
• high quality CNC workmanship – precise fit of elements, wear resistance

Set components

• SV503 70 f/6.78 OTA optical tube
• 2"–1.25" adapter
• a pair of tube clamps
• dovetail mounting plate
• lens cap
• 1.25" dust cover

Technical parameters

• Lens diameter: 70 mm
• focal length: 474 mm
• aperture: f/6.78
• optical design: 4-element ED lens (FPL51 + lanthanum glass)
• field corrector: 2-element, installed in the tube
• Flat field diameter: 32 mm (100% correction)
• focuser: 2.5" RAP with 1:10 microfocus and 2"–1.25" adapter
• external thread: M54 × 0.75 (female)
• working distance from 2" connector: 127.5 mm
• tube length (folded): 365 mm
• tube diameter: 82 mm
• Deflector diameter: 93 mm
• weight with accessories: 2685 g