Specification Brand : Thousand Oaks Optical BulletPoint : H-Alpha Emission Filter 656nm Narrow Band Pass Multiple Sizes With Frame For Astrophotograph Telescope BulletPoint1 : 90mm .50" SolarLite Filter for 80mm .15" instruments. This filter should fit the following telescope models: TV Ranger, Williams Optics ZS66 and instruments of similar outer diameter. Part # S3500. BulletPoint2 : Please read carefully: 90mm .50" is the diameter of the filter. The filter fits like a cap by friction. To be absolutely sure that the filter will fit, please measure the outer diameter of your instrument and make sure that it is not larger. BulletPoint3 : SolarLite filters have the optical quality of the glass with the advantages of impregnated polymer (Thousand Oaks Optical Black Polymer). The sun will appear in a natural yellow-orange color when viewed through your telescope using this filter. BulletPoint4 : This is a high quality product of Thousand Oaks Optical (Arizona), a manufacturer of safe solar filters for over 30 years. Words of the producer: stronger than any other solar film on the market. Guaranteed 15 years. BulletPoint5 : WARNING: ALWAYS MAKE SURE THE FILTER IS WELL ATTACHED TO THE TELESCOPE/BINOCULARS/CAMERA. IN CASE NECESSARY, USE STICKY TAPE TO SECURE IT. NEVER OBSERVE SUN WITHOUT A PROPERLY ATTACHED FILTER! BulletPoint6 : Product 2: Unlike other adapters, NexYZ features 3 directional knobs (X, Y, and Z axis) that perfectly align your phone’s camera with the eyepiece in seconds so you are ready to snap the perfect image; In addition, you can make tension adjustments to keep the phone firmly in place BulletPoint7 : Product 2: NexYZ stands up to rigorous field use thanks to its robust, durable construction with a metal frame and polymer body Color : unknown CompatibleDevices : Camera, Camera Accessories ExternallyAssignedProductIdentifier : 7290110151010 ExternallyAssignedProductIdentifier1 : 0738588217526 ExternallyAssignedProductIdentifier2 : 738588217526 Finderscope : Reflex FocalLengthDescription : 20 millimeters FocusType : Manual Focus GpsrSafetyAttestation : 1 IncludedComponents : Vixen/Tele Vue Mount Adapter with all hardware ItemName : Thousand Oaks Optical SolarLite Filter for Telescope, 90mm, Black Polymer, Enhancing Effect ItemPackageDimensions_Height : 12 centimeters ItemPackageDimensions_Length : 5.7 centimeters ItemPackageDimensions_Width : 11.1 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : telescope-filters Manufacturer : Thousand Oaks Optical Material : Aluminum ModelName : TE-AVT-1011 ModelNumber : S3500 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : 3500 PhotoFilterEffectType : Enhancing PhotoFilterSize : 90 millimeters PhotoFilterThreadSize : 80 millimeters PowerSourceType : Manual Operation ProductDescription : SOLARLITE Filters: NEW (Best Value) After years of R & D we have developed a new solar film that has the optical quality of the glass with the advantages of impregnated polymer (Thousand Oaks Optical Black Polymer). Will never develop pin holes or scratches that can let in light and ruin a filter. Other advantages: Light weight and does not require re-balancing tube assembly, will not break, consistent yellow-orange solar image, even density with any aperture, flat surface compared to other thin film filters that have wrinkles and creases. Will not tear or puncture. Stronger than any other solar film on the market. Also available in sheets. Guaranteed 15 years. ProductSiteLaunchDate : 2016-09-22T07:00:00.000Z Style : Pad + Smartphone Adapter SupplierDeclaredDgHzRegulation : not_applicable TelescopeMountDescription : Equatorial Mount UnitCount : 1 UnspscCode : 41111700 WarrantyDescription : 2 Year WaterResistanceLevel : waterproof ZoomRatio : 20