SV226 filter drawer adopts integrated CNC molding and anti-light leaking design. It can compatible with 1.25" & 2" specifications filters on the market. Strong magnetic attraction, prevent the filter from falling off. Advanced CNC integrated molding processing, strong and sturdy. Thickness affects back focal length, which affects image quality and available accessory options. SV241 Pro Astronomical Telescope Photography Power Management Box is a compact, durable power solution with 5 DC outputs, USB ports, and PWM channels for cameras, heaters, and sensors; Suitable for nighttime observation and astronomical photography. Our SV241 Pro Power Management Box's system offers static electricity protection, reverse connection and backflow prevention, plus USB 3.0 and DC filtering. Fuse, voltage, current, and short-circuit protections ensure stable power, while intelligent detection and auto-restart keep devices safe and running smoothly.