Bresser Lunt LS50FHA H-Alpha Double-Stack Solar Telescope Filter for Safe Solar Viewing

50Mm H-Alpha Double-Stack Solar Filter, For All Ls50Fha Filter-Systems And Ls60Tha/Ls60Mt Telescopes.

This Double-Stack Etalon Is Compatible To All Lunt Solar Systems Ls50Fha Filter-Systems And Ls60Tha / Ls60Mt Telescopes. Adding This Additional Double-Stack Etalon System Will Reduce The Bandwidth To ~<0.55 Angstrom (Dependent Upon Used Telescope). So You Will Have Much More Contrast And More Details On The Sun Will Be Visible.

Without Blocking Filter! Only For Use As Double-Stack Filter, Or Together With A Additional Available Blocking Filter. If The Filter Is Used Only Single Stacked Together With A Optional Blocking Filter, Then The Bandwidth Is <0.75 Angstrom.

Features

• Aperture: 50 Mm
• No Central Obstruction
• Bandwidth Double Stacked: <0,55 Angstrom
• Tuning: Tiltable Etalon
• Housing Diameter: 95 Mm
• Length: 73 Mm
• Weight: 0.7 Kg
• Front Thread: M90X1 Female Thread
• Rear Thread: M90X1 Male Thread

• Ls50Fha Solar Filter
• Transport Case
• Instruction Manual