LUNT B3400 Blocking-Filter in 2 inch extension tube
For free combination with a Lunt-Solar-Systems H-alpha solar-telescope or -filter
- Blocking-filter in straight extension tube
- For combination with H-alpha telescopes or filters
- For telescopes up to 3060mm focal length and 2 inch focuser
- Eyepiece side with 1.25 and 2 inch eyepiece connection
- Cannot be used stand-alone, only with H-Alpha systems!
£3,498.00*
Available, delivery time: 10-12 working days
Product number:
0553013
EAN:
4007922035871
WEEE-Reg.-Nr.:
DE 34323861
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FAQ - Frequently Asked Questions
That is normal. Finder scopes are only used to make objects easy to locate. The image orientation does not matter for observation.
- Alt-azimuth: easy to use, moves horizontally and vertically
- Equatorial: enables precise tracking of objects with only one axis – ideal for high magnifications and astrophotography
- Moon: from 30 mm
- Planets: from 100 mm
- Deep sky: from 150 mm
Product information "LUNT B3400 Blocking-Filter in 2 inch extension tube"
Blocking-filter in straight extension tube, for telescopes up to 3060mm focal length. Can only be used together with a LUNT H-alpha filter, or with a LUNT H-alpha telescope!
Lunt Solar Systems offers blocking-filters in different sizes, and alternatively in 90° star-diagonal housings or straight extension tubes. You can choose what blocking-filter you will use at your LUNT H-alpha Etalon system.
The B3400 is installed in a straight extension tube, for 2 inch (50.8mm) focuser on the telescope side, and with 2 inch eyepiece connection and 1.25 inch (31.7mm) adapter on the eyepiece side. The B3400 can be used at LUNT H-alpha systems, if the used telescope has up to 3060mm focal length.
FEATURES
Lunt Solar Systems offers blocking-filters in different sizes, and alternatively in 90° star-diagonal housings or straight extension tubes. You can choose what blocking-filter you will use at your LUNT H-alpha Etalon system.
The B3400 is installed in a straight extension tube, for 2 inch (50.8mm) focuser on the telescope side, and with 2 inch eyepiece connection and 1.25 inch (31.7mm) adapter on the eyepiece side. The B3400 can be used at LUNT H-alpha systems, if the used telescope has up to 3060mm focal length.
The blocking-filter can not be used without additional H-alpha filter system from Lunt Solar Systems! Blocking-filters are absolutely required for the safety and performance of H-alpha telescopes for solar observing. Lunt Solar Systems blocking-filters contain a unique filter system. We can only warranty safety or performance, if blocking-filter is paired with a H-alpha filter or H-alpha telescope of Lunt Solar Systems.
At the tab "Accessories" you will find H-Alpha telescopes and filters with which this blocking filter can be combined.
FEATURES
- Blocking-filter only usable at additional H-alpha filter system
- Filter diameter: 34mm
- Usable at telescopes up to 3060mm focal
- In straight extension tube
- For 2 inch focuser
- Connection for 2 inch eyepieces
- Adapter for 1.25 inch eyepieces
- Blocking-filter B3400 in 2 inch straight extension tube
- Adapter for 1.25 inch eyepieces
| Batteries required: | No |
|---|---|
| Colour: | black |
| Extended warranty (years): | 2 |
| Eyepiece Barrel Diameter (mm): | 50.8 |
| Filter thread size (mm): | 50.8 |
| Material: | Aluminium |
| Net weight (without access.) (g): | 320 |
Product and safety instructions
Manufacturer:
Bresser GmbH, Gutenbergstraße 2, 46414 Rhede
Contact:
www.bresser.de
www.bresser.de
Warning notes
- Safety instructions: There are certain dangers when observing the sun, regardless of the telescope used. Lunt-Solar-Systems places great emphasis on the safety of their products during manufacture. Your safety is the highest priority, and we ask that you carefully read the telescope manual before beginning solar observation. Please never disassemble the telescope! Never use it if it has been modified or damaged in any way! Always contact our customer service if you have any questions regarding the safety of your instrument. Never look at the sun with an unprotected eye or with a telescope not intended for solar observation! Never leave your telescope unattended while it is pointed at the sun! Other people who are unfamiliar with it might attempt to replace the block filter with another prism, unaware of how critical this filter is for safety. The components of Lunt-Solar-Systems telescopes are not interchangeable with those of other manufacturers. Lunt-Solar-Systems solar telescopes contain several different optical elements that have been precisely adjusted and mounted during manufacture. These systems require no maintenance. Never disassemble the telescope. Doing so will void the warranty, potentially leading to expensive repairs, and may cause future damage to your instrument, compromising your safety! Most Lunt-Solar-Systems telescopes and filters include a very sensitive optical component called an Etalon. These Etalons are built into the system to protect them as best as possible. Countless considerations have been made to ensure the best performance of this "heart" of every system, even under the daily stresses it inevitably faces, such as shocks and vibrations during transport or regular use. Nevertheless, it should never be dropped. Improper use of the telescope can damage the Etalon (not a warranty case) and render the system unusable until repaired. The instrument should always be stored in its original packaging or in the optional transport case (item number 0554010). Like any optical precision instrument, it should be stored in a dry environment. With proper care, you will enjoy your instrument for a lifetime!
