SV132 1.25-inch H-Beta astronomical light damage filter [25nm]

SV132 1.25-inch H-Beta astronomical light damage filter [25nm]

Name: SV132 1.25-inch H-Beta astronomical light damage filter [25nm]
Brand: mickcara
SKU: bccbec
Price: 210.00 USD
Availability: InStock

2 sold in last 8 hours

Brand: mickcara

Product Code: bccbec

Availability: In stock

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$210.00

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Total: $210.00

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Description

The H-Beta 25nm filter allows you to visually observe the popular but elusive Horsehead Nebula with a large aperture telescope in dark skies, and can also be used to image the Horsehead Nebula and other nebulae emitting 486nm light (such as the California Nebula) and cocoon nebulae.
Features:

2. Laser engraving to prevent fading
3. Apply multilayer anti reflective non adhesive coatings through electron beam gun evaporation and ion assisted deposition
4. The filter substrate undergoes fine optical polishing to achieve 1/4 wave and 30 parallelism on both surfaces

6. Each filter comes with a plastic casing lined with highpressure EVA casing

Specifications:
1. The thin metal battery has a 26 millimeter aperture and is suitable for 1.25inch filters
2. Blocking area: 400-700nm
3. Transmittance: 80% at 486nm
4.0.1% transmittance mercury at 435nm and 578nm
5.0.1% transmittance of Na at 589nm
6. Half width: 25 ± 3nm
7. Thickness: 1.85mm
8. Surface quality: 60/40 (refer to MIL-O-13830)
9. Thread size: M28.5 * 0.6
10. Net weight: 5.4g/0.19oz
Warning:
Filters are not designed for sun observation. Do not use this filter to look at the sun. If you do not follow the warning, you will go blind.
The package includes:
SV132 1.25 H-Beta filter

Logistics information

Our products are located in Hong Kong, China, and the logistics speed depends on your specific location. According to our experience, it usually takes about 15-20 days of transportation time

CONTACT US

If you have questions or concerns then please do not hesitate to get in contact with us. We would love to hear from you, contact us on: whatsapp：+8613625959351

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Size Guide

How to choose the correct size:

Step 1 Please measure your foot length carefully.

Step 2 Please choose the correct size according to your foot length and chinese size.

For example, If your foot length is 255 mm , you should choose the size 8.

Step 3 If you\'re not sure of the correct size, you can click chat with us！

WHATSAPP:+8613625959351

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SV132 1.25-inch H-Beta astronomical light damage filter [25nm]