A blockfilter is not an accessory that you can buy with it, it is a necessary part of each H-alpha system. The etalon at the front allows the H-alpha line to pass through, as well as its harmonics. The blocking filter is located just before the eyepiece and removes all this remaining light. Without a blocking filter, the system is not safe.
The number is the pass
B600, B1200, B1800, B3400: the number indicates the free passage in tenths of millimeters. A B1200 has a 12 mm passage.. The larger the aperture, the larger the portion of the field of view that unobstructed and uniformly illuminated and the longer the focal length you can use without vignetting.
Rule of thumb: for visual use is a smaller block filter sufficient. For photography Your sensor size determines the choice. Small sensor: B1200 can. APS-C: B1800. Large sensor or full-frame: B3400.
This version: 18 mm in zenith mirror (1.25 inch)
Passage 18 mm, suitable for telescopes to 1620 mm focal length. Execution: Zenith mirror (1.25 inch). On the eyepiece side, 1.25 inch with T2 thread for camera connection.
Same 18 mm aperture as the d2 version, but with a 1.25-inch telescope connection instead of 2 inches.
Notice: This filter does not work independently. It is only usable in combination with a Lunt H-alpha telescope or filter system.
Specifications
- Passage 18 mm
- Suitable for focal length: 1620 mm
- Execution: Zenith mirror (1.25 inch)
- Oculaira connection: 1.25 inches
- Camera connection: T2 thread
- Only usable with: Lunt H-alpha systems
- Bresser Article Number: 0553006
What you receive
- Block filter 18 in zenith mirror (1.25 inch)
- Manual
Safety
Never look at the sun without the H-alpha etalon and blocking filter correctly installed. Use the instrument only as intended by Lunt and never disassemble it. Never leave a telescope pointed at the sun unattended.
You can find more solar instruments and modules from this merk on the Lunt Solar Systems merk Page.
Reviews
There are no reviews yet.