Enhance your astrophotography and telescope performance with this precision-engineered 60mm Object Lens Cone featuring a fully multi-coated lens for superior light transmission and clear, sharp images. Designed for serious astronomy enthusiasts, this lens cone offers a 240mm focal length with an F4 focal ratio, delivering bright and detailed views ideal for guide star tracking and imaging. Key Features: · 60mm Fully Multi-Coated Object Lens: Maximizes light transmission while minimizing reflections and glare, ensuring crisp and high-contrast images during observation and astrophotography. · Robust 6-Point Screw Bracket: Provides secure and stable mounting, maintaining alignment and enhancing durability for long-term use. · 240mm Focal Length with F4 Ratio: Offers a versatile balance between wide field views and detailed magnification, perfect for a variety of astronomical applications. · Quick Focus Retractable Tube (35mm Travel): Allows fast and precise focusing adjustments, improving user experience during observations. · 10mm Micro-Focusing Helical Focuser: Enables fine focusing control for enhanced image sharpness and accuracy. · Standard 1.25"/31.7mm Connector: Compatible with most eyepieces and electronic equipment, facilitating seamless integration with a wide range of telescope accessories. · M42*0.75 External Screw Thread: Designed for easy connection to cameras, supporting astrophotography setups. · Removable Dovetail Bracket: Offers flexible mounting options, making it easy to install and remove according to your setup needs. · Wide Compatibility: Perfectly suited for astrophotography telescopes and compatible with popular guide cameras such as CCD guide star cameras, SG4, QHY5II, and ZWO sensors. Specifications: · Material: Metal · Focal Length: 240mm · Focal Ratio: F4 · Item Weight: 889g (31.36oz) · Package Weight: 1074g (37.91oz) · Package Size: 28 x 15 x 15 cm (11.02 x 5.91 x 5.91 in) Package Includes: · 1 x Lens Cone · 1 x Guide Ring This versatile and high-quality lens cone is an essential accessory for astrophotographers and astronomers seeking to improve their guiding accuracy and image clarity. Its durable metal construction and precise focusing mechanisms provide reliable performance under various observational conditions, making it an ideal choice for enhancing your telescope system.