LUNT B1800s blocking filter in extension tube

LUNT B1800s blocking filter in extension tube

Blocking filter in straight extension tube for telescopes up to a focal length of 1620 mm. Can only be used in conjunction with a LUNT H-Alpha filter or a LUNT H-Alpha telescope!

Lunt Solar Systems offers blocking filters in various sizes and, at your choice, in 90° diagonal mirror housings or in straight extension tube. You can choose which blocking filter you want to use in your LUNT H-Alfa Etalon system.

The B1800s is mounted on a straight extension tube, on the telescope side for 1.25'' and 2'' eyepiece focuser, on the eyepiece side with T2 thread connection and 1.25'' eyepiece housing. The B1800s can be used on LUNT H-Alpha systems where the telescope used has a focal length of up to 1620 mm.

the locking filter cannot be used without an additional H-Alpha filter system from Lunt Solar Systems! Blocking filters are essential to ensure the safety and operability of an H-Alpha telescope for observing the Sun. Lunt Solar Systems blocking filters form an extraordinary filter system. We can only guarantee your safety and the operability of your telescope if the blocking filter is used together with an original H-Alpha filter or a Lunt Solar Systems H-Alpha telescope.

TECHNICAL SPECIFICATIONS:

PROPERTIES

• Blocking filter exclusively for use with an additional H-Alpha filter system
• Filter diameter: 18 mm
• Suitable for telescopes up to 1620 mm focal length
• In straight extension tube
• For use in 1.25'' and 2'' eyepiece focusers
• Eyepiece holder for 1.25'' eyepieces
• T2 thread for camera connection

DELIVERY CONTENTS

• B1800s blocking filter in straight extension tube

• Color: Black
• Material: Aluminum