Check the listing for details. SVBONY SV226 Filter Drawer Integrated Molding +SV220 Dual-Band 7nm Nebula Filter. Condition: New. Listed at 159.99 USD. Product Description . SV226 filter drawer adopts integrated CNC molding and anti-light leaking design . It can also use 1.25" & 2" specifications on the market. Double pair of magnets; compared with traditional screw rotation; magnet has stronger adsorption force; which is convenient for you to install and use. Two filter holders; standard 1.25" and 2" filter holder; plug and play; reducing repeated disassembly and installation steps in a dark environment. Compatible with 1.25”&2” filter installation; existing 1.25" and 2" filters can also be used; for beginners of photography; save the budget for changing filter sizes. CNC integrated molding; the advanced processing can assure the quality; provide more accurate; consistent results; you can use it with confidence. Lock screw; the locking function is helpful on adjusting the tension to eliminate the gap; which is a double insurance for you. M42-M48 adapter; camera side thread is male; filter mounts thread is female; you can use the adapter to coonect cameras of different specifications. Filter drawer thickness; the thickness is related to back focal length; back intercept affects the quality of imaging; it limits the use of accessories and optical path length. Use with telescope; connect the telescope to the focal reducer and drawer filter; then connect the adapter to the camera. The filter drawer can use with SV550,SV503 OTA or F9198F,F9198K camera. The SVBONY 7nm dual band filter is designed to drastically reduce the effect of light pollution. The 7nm bandwidth means it strongly isolates the nebulae's emissions into H-Alpha (red) and OIII (green-blue) from anything else. It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high- and low-pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our atmosphere. Features:1.Allows for imaging in bright man-made light pollution and moonlit conditions2.Take color images without needing to combine images with multiple filters3.Most useful for One-Shot Color cameras4.Useful for imaging emission nebulae, planetary nebulae and supernova remnants5.High transmission and sharp cut-off can greatly enhance the contrast and bring out the most detailed information for those deep-sky objects6.Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow7.The duo-band narrowband filter is not suitable for visual observation and not designed for imaging or observing the Sun8.Be aware that the SV220 is not a great fit for fast telescopes, some users reported that the Duo-Band OSC Filter paired with the RASA caused band shift, thus clipping the HA data. Dual Narrow bandwidth H-Alpha/O-III 7nm narrowband filter properly designed for astrophotography both in light polluted. about svbony