Specification Brand : Lincoln Electric BulletPoint1 : This can be useful when viewing the sky in areas where there is alot of light pollution BulletPoint2 : A good quality eyepiece filter for reducing the brightness of the moon and improving contrast and surfacr detail BulletPoint3 : Reduces Glare and improves definition so you can see the moons features much more clearly BulletPoint4 : The Skyglow filter absorbs more light at longer wavelengths and therefore increases viewing contrast BulletPoint5 : 1.25 inch Moon and Skyglow Filter is Skyglow is a multi bandpass filter transmitting a high percentage of light in the visual spectrum Color : One Color CompatibleMountings : Canon EF ExternallyAssignedProductIdentifier : 6971336220155 ExternallyAssignedProductIdentifier1 : 0015082761329 ExternallyAssignedProductIdentifier2 : 015082761329 FocalLengthDescription : fixed-non-zoom FocusType : Manual Focus GpsrSafetyAttestation : 1 InstallationType : Bolt-On ItemName : Guide Tube Outgoing (Bowed) ItemPackageDimensions_Height : 5.3086 centimeters ItemPackageDimensions_Length : 1.905 centimeters ItemPackageDimensions_Width : 4.4958 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : telescope-guiders-and-wedges Manufacturer : Lincoln Electric Material : Optical Glass MaxFocalLength : 1 millimeters MinFocalLength : 1 millimeters ModelName : HYFFHCBYV-60230 ModelNumber : KP2053-1 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : LINKP2053-1 PhotoFilterEffectType : Enhancing ProductDescription : LINKP2053-1 Features: -Guide tube outgoing (bowed). Dimensions: -Product weight: 0.02 lb. ProductSiteLaunchDate : 2011-04-07T09:06:22.443Z Size : 60230 Style : SC311 Telescope Camera Moon Photography Combination SupplierDeclaredDgHzRegulation : unknown UnitCount : 1 UnspscCode : 25170000 WaterResistanceLevel : not_water_resistant