Product Description

Brief Introcuction of H-Alpha 7nm Astronomy Filters:

H-alpha 7nm filter is an extremely narrow emission-line filter for CCD photography. The filter lets the H-alpha light of emission nebulae pass and blocks nearly the whole remainder of the spectrum where the CCD is sensitive. 

 

The full width at half-maximum (FWHM) of 7nm is optimized for a maximum contrast between the (H-alpha emitting) object and the background. The contrast gain is much higher than with our *2nm emission line filters but you wont see as much stars in the resulting images.

 

The design of the transmission curve makes it possible to use the filters with instruments from 1:3.*5 to 1:*5. Selected filters for faster system are available upon special request.

 

Main use

The Optolong H-alpha-CCD (7nm version) increases the contrast between objects, in this case between the H-alpha emission line and the skyglow background in the same way as the *2nm version. The gain in contrast is much higher due to the smaller FWHM. The 7nm H-Alpha filter is the right choice for extremely dim objects, even in the milkyway, and for observations from heavily light-polluted places. The Optolong 7nm H-alpha-CCD completely suppresses the emission lines of artificial lighting (mercury (Hg) and sodium (Na)) and skyglow. 

 

Other uses

Using the Optolong 7nm H-Alpha together with the *2nm H-Alpha gives you the ability to have a maximum contrast in the HII objects and to keep the stars in the final image.

The Optolong 7nm H-Alpha filter may NOT be used for solar observation.

 

Alternatives

If you plan to do (false-)color imaging with other emission line filters, you should get our filters with *2nm FWHM. Images taken with filters with differing FWHM are very difficult to combine into the final image.

Advantage of OPTOLONG Astronomy Filters:
*5 years of experience in optical filters
Ion assisted deposition technique ( IAD) using
The high film layer density, high film layer firmness, high performance and stability.
A wide range of cut-off，High cut-off depth，High transmittance.
Effectively prevent stray light interference.
All filters are RoHS requirements.
OEM and ODM are welcomed!


OPTOLONG Astronomy Filter Accessories:

Photographic Filter	Visual Filter	Size
UHC CLS CLS-CCD LRGB O-III H-Beta ND2～***0 SII-CCD *2nm NII-CCD 7nm H-Alpha 7nm/*2nm Night Sky H-Alpha Single Polarizer Filter Variable Polarizer Filter	UHC CLS O-III H-Beta H-Alpha *0nm Moon & Skygolw Filter Single Polarizer Filter Variable Polarizer Filter	1.*5 2 φ*6

Yulong Optics Co., Ltd. is a high technology company, which specialized in optical filter design and processing. Our products include Astronomical Filter,Bandpass Filters,Fluorescence Filters,Edge filters, Longpass & Shortpass Filters,Beam spliters,Anti-reflective Coating,Optical Mirrors and so on.

OPTOLONG Established in ***9, and located in Kunming City .We provided nearly ***0 kinds of optical coating filters every year, Business services for more than **0 optical companies all over the world, and established long-term stable cooperative relations with 4 global top **0 enterprises and 2 world famous EMS manufacturers.

We've obtained ISO***1 system certificate since ***5. Our products passed by SGS test and RoHS test . OPTOLONG is the first company who earned the Golden Supplier from Alibaba in Yunnan area, and passed certification by TUV Rheinland and Bureau Veritas independent .

All filters of OPTOLONG is in line with the European Union RoHS requirements.

OPTOLONG main equipment
Five sets of precision optical coating machine, two spectrophotometer UV***0 from shimadzu, interferometer, goniometer, resolution of the detector,ultrasonic cleaning machine, rolling machine, cutting machine, scribing machine, etc.
 
OPTOLONG R&D team
OPTOLONG has a group of rich practical experience of senior R&D team,and a group of skilled optical operation workers , various kinds of optical filter film can be designed and manufactured according to customer demand .OPTOLONGs optical filter with high quality , reasonable price and timely delivery goods,aim to create more value for you, become "Your optical filter partner!"

OPTOLONG products including three main categories :

Astronomy Filters:

We are the most professional manufacturer of astronomical filters in China,we have broken the foreign monopoly situation on astronomical filters. OPTOLONG produce more than *0 kinds of astronomical filters offers more options for amateur astronomers all over the world.

Fluorescence Filters:

We design and product all specifications of fluorescence filters,include excitation filter, emission filter,and dichroic mirror.

Laser and Bandpass Filters:

We are with the filter design and production experience for many years, can be customized bandpass filter with wavelength from **0 nm to ***0 nm.

Also others :

Edge Filter,Beam Splitters, Reflective Mirror, Anti-reflective coating, Optical windows etc. Custom filters can be fabricated:please contact our technical support staff to discuss your particular requirements.

 

Country:	China
Model No:	H-Alpha 7nm
FOB Price:	50 ~ 360 / Piece (Negotiable) Get Latest Price
Place of Origin:	-
Price for Minimum Order:	50 per Piece
Minimum Order Quantity:	1 Piece
Packaging Detail:	High-density carton, with protective sponge inside
Delivery Time:	Air/Express
Supplying Ability:	20000 Piece per Month
Payment Type:	T/T, Western Union, PayPal
Product Group :	Astronomy Filter