7,500+ items available from stock
Best price guarantee
Your partner for astronomy
Solar Observation > Solar Filters > Mounted glass filters > Coronado > Etalon > Coronado Filters Double Stacking Etalon Solarmax II 90mm
Product no.: 59468

Filters Double Stacking Etalon Solarmax II 90mm

$ 3,560.00 incl. VAT, plus shipping costs
too expensive?
long-term
Product not available anymore + lead time

Product description

Double stack: Every SolarMax telescope also comes with double stack. This means that two etalon filters are fitted one behind the other. This reduces the half width of the light which passes through the H-alpha line to less than 0.5 Angstroms. Without double stack, the half width is less than 0.7 Angstroms. The half width is provided in the product name and in the telescope's technical information.

The smaller half width results in higher contrast. The Sun’s structures appear three-dimensional. The image is also darker and needs to be finely readjusted using the tuning system due to the filter’s smaller half width.

This etalon filter allows you to retrofit your SolarMax telescope with a second H-alpha filter (known as 'double-stacking'). The etalon is simply screwed onto the lens. With a SolarMax II telescope, you will need the matching adapter ring from the recommended accessories. Like the telescope's built-in filter, this etalon is also equipped with the RichView system, which allows fine tuning of the filter. An etalon filter must never be used without a blocking filter! But of course the blocking filter is already built-in to the SolarMax telescope.

RichView™ tuning: The Doppler effect causes the wavelengths of interesting structures to vary around the H-alpha line of 656.3 nanometers. This effect is particularly noticeable in the change between the central solar disk and the edge (prominences). The RichView™ tuning system allows you to adjust the filter, to find the best possible contrast.

Specifications

Capacity


Frame
lens filters
Appropriate for telescopes
SolarMax II

General


Series
Etalon
Type
Solar Filters
Type of build
line filter

Recommended accessories

Telescope accessories (2)

Coronado Adapter Doublestack 90mm

$ 54.00*
Outdoor (1)

Lunt Solar Systems Sun hat with neck protector

$ 64.00*
Solar Observation > Solar Filters (3)
Blockfilter

Coronado Blockfilter BF 15mm 1.25"

$ 1,090.00*

*All prices include VAT plus shipping costs.

Coronado Filters Double Stacking Etalon Solarmax II 90mm

Customer reviews

There are no customer reviews for this product yet.

Compose your own review

Do you have specific questions about your order or products? Please contact our customer service!