OPTOLONG 1.25" Filter H-Alpha 7nm Narrowband Astronomical Photographic Filters for Monocular Telescope

OPTOLONG 1.25″ Filter H-Alpha 7nm Narrowband Astronomical Photographic Filters for Monocular Telescope

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$235.59

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Product Description

Description:

Because H-A is 656nm mainly through the high permeability of the spectrum, and 656nm spectrum of the color presented by the red-based, 300-1100nm cut-off depth to make the details of launching nebula more rich. Extremely narrow bandwidth only allows the 656nm band to pass through the filter, can effectively cut off the artificial light Na lamp and Hg lamp interference to the transmission line through, in order to enhance the nebula contrast. With CCD is better choice for deep sky photography and wide field astrophotography.


Specifications:

Size

 1.25 Inch

Central wavelength

 656.3nm

Half bandwidth

 7nm

Peak transmittance

 <85%

Cut-off range

 300-1100nm

Cut-off depth

 OD3

Finish

 60/40

Face shape

 λ/4

Parallelism

 30 seconds

Thread

 M28.5 * 0.6


Features:

- High cutoff is effective, it is light damage and other stray light interference

- Use Germany Selected glass, with double-sided polishing processing

- For the emission line 656nm transmittance of 85% or more

- Frame with high quality aluminum alloy material, anodized extinction treatment

- With SII, H-Alpha, OIII shooting, that SHO Filter, post-synthesis ‘Hubble’

- The narrow-band filter, even in areas where light pollution is heavy, and the full moon (the moon’s largest and brightest) is the same, very narrow bandwidth, which reduces the interference from the external environment, but the haze and cloudy The weather is not possible.

- Box PP environmentally friendly materials, simple and beautiful

- Lined with double-layer EVA cushioning cotton

- Precision CNC integrated molding

- Multi-layer anti-reflection coating


Package Included:

1 * 1.25 Inch H-Alpha 7nm Filter  

1 * PP Plastic Box

More Detailed Photos:

OPTOLONG 1.25" Filter H-Alpha 7nm Narrowband Astronomical Photographic Filters for Monocular Telescope
OPTOLONG 1.25" Filter H-Alpha 7nm Narrowband Astronomical Photographic Filters for Monocular Telescope
OPTOLONG 1.25" Filter H-Alpha 7nm Narrowband Astronomical Photographic Filters for Monocular Telescope
OPTOLONG 1.25" Filter H-Alpha 7nm Narrowband Astronomical Photographic Filters for Monocular Telescope
OPTOLONG 1.25" Filter H-Alpha 7nm Narrowband Astronomical Photographic Filters for Monocular Telescope
OPTOLONG 1.25" Filter H-Alpha 7nm Narrowband Astronomical Photographic Filters for Monocular Telescope

Additional Information

When you order from Alexnld.com, you will receive a confirmation email. Once your order is shipped, you will be emailed the tracking information for your order’s shipment. You can choose your preferred shipping method on the Order Information page during the checkout process. Alexnld.com offers 3 different international shipping methods, Airmail, Airmail registered and Expedited Shipping Service, following are delivery times:

Airmail and Airmail Registered Area Time
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Australia, New Zealand, Singapore 10-25 business days
United Kingdom, France, Spain, Germany, Netherlands, Japan, Belgium, Denmark, Finland, Ireland, Norway, Portugal, Sweden, Switzerland 10-25 business days
Italy, Brazil, Russia 10-45 business days
Other countries 10-35 business days
Expedited Shipping 7-15 business days to Worldwide

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