Description
7NM 2-Inch HO/SO Dual Narrow Band Astronomical Filter for Color Cameras with M48x0.75 Thread
Description:
- The 7nm HO/SO narrowband filter is generally used in color cameras to filter out light pollution such as mercury lamps and sodium lamps in the environment, only passing through Ha (656.3nm), Oiii (500.7nm), Sii (672.4nm), thereby enhancing image contrast and signal-to-noise ratio, and shooting high contrast nebula images.
- Compared to narrowband filters such as 3nm/5nm, 7nm has a wider half bandwidth, making it more suitable for fast optical systems. Additionally, its excellent anti glare design allows users to produce images more quickly.
Specification:
- Size: 2-inch
- Half bandwidth: 7nm±0.5nm
- Centre wavelength: HO (500.7nm/656.3nm); SO (500.7nm/672.4nm)
- Peak transmittance: Sii > 85%; Oiii > 85%; Ha > 90%
- Cut-off depth: >0D4
- Cut-off range: 200 - 1000nm
- Filter thread: M48*0.75
- Glass thickness: 2mm
- Connector ring thickness: 5+2mm (thread thickness 2mm)
- Recommended focus ratio: F2.8 - F16
Package Included:
- 2 x Filter
Description:
- The 7nm HO/SO narrowband filter is generally used in color cameras to filter out light pollution such as mercury lamps and sodium lamps in the environment, only passing through Ha (656.3nm), Oiii (500.7nm), Sii (672.4nm), thereby enhancing image contrast and signal-to-noise ratio, and shooting high contrast nebula images.
- Compared to narrowband filters such as 3nm/5nm, 7nm has a wider half bandwidth, making it more suitable for fast optical systems. Additionally, its excellent anti glare design allows users to produce images more quickly.
Specification:
- Size: 2-inch
- Half bandwidth: 7nm±0.5nm
- Centre wavelength: HO (500.7nm/656.3nm); SO (500.7nm/672.4nm)
- Peak transmittance: Sii > 85%; Oiii > 85%; Ha > 90%
- Cut-off depth: >0D4
- Cut-off range: 200 - 1000nm
- Filter thread: M48*0.75
- Glass thickness: 2mm
- Connector ring thickness: 5+2mm (thread thickness 2mm)
- Recommended focus ratio: F2.8 - F16
Package Included:
- 2 x Filter
Payment Terms
1. We accept PayPal,Payoneer,Visa Card,Google pay,Credit card etc.
2. We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay.
2. We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay.
Shipping Terms
1. We will process the order within the handling time ,if you have any questions, please contact us via eBay message or email.
2. For remote regions of DHL/FedEx..., extra shipping costs might be charged. Usually it costs about 30USD-50USD. We will contact you if shipping company informed us your address belongs to remote area. Thanks for your understanding.
2. For remote regions of DHL/FedEx..., extra shipping costs might be charged. Usually it costs about 30USD-50USD. We will contact you if shipping company informed us your address belongs to remote area. Thanks for your understanding.
Return Terms
If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days. We will guide you the returning process for replacement or refund.
Custom Duties & Taxes
1. It is buyer's responsibility to cover the import duties, taxes.We do not charge any taxes and fees, and the possible taxes and fees will be collected by the platform or by third parties such as customs and carriers.
2. Please check with your country's customs office and inform us what/how much should declare before shipping.
2. Please check with your country's customs office and inform us what/how much should declare before shipping.
Feedback
1. Please kindly leave us a positive feedback and 5 star DSR if you satisfied with our product and service. Please feel free to contact us firstly if you have any problem with your order, we are responsible and credible seller and will solve the issue it for you asap.
2. If you are dissatisfied for any reason, please don't be quick to leave us neutral or negative feedback. We work hard to make sure EVERY CUSTOMER 100% SATISFIED and resolve any problem for you and always leave positive feedback to all our customers.
2. If you are dissatisfied for any reason, please don't be quick to leave us neutral or negative feedback. We work hard to make sure EVERY CUSTOMER 100% SATISFIED and resolve any problem for you and always leave positive feedback to all our customers.
On Apr 16, 2026 at 01:04:54 PDT, seller added the following information: