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PREORDER Antlia OIII 3nm Pro 2"

รายละเอียด

คะแนนสินค้า

			(1 รีวิว)

SKU

AN-OIII30NM200P

ผู้ผลิต

Antlia

จำนวนในสต๊อก

เหลือ 1 ชิ้น

น้ำหนัก

50.00 g

ราคาของเรา

฿13,990.00

ตัวเลือก

จำนวน (เหลือ 1 ชิ้น)

(จาก 1 ถึง 1)

สินค้า รายละเอียด

Antlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal.Antlia OIII 3nm Pro filters are designed to deliver 85% transmission at the 500.7nm line which provides you with the maximum signal and well defined nebulae structures.

Conventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)-shift. We guarantee T>85% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. Blue-shift data shows that Antlia 3nm Pro filters can be used with nearly all systems as fast as f/3 with minimal loss in emission signal and meets the requirements of fast optics like Hyperstar and RASA.

The out of band blocking specification is rated OD5 (0.001%) which delivers an excellent SNR(signal to noise ratio) and effective cut-off rate to minimize interference from other wavelengths. Improved sharp cut-off astrophotography 3nm Pro filters are designed to minimize halos around bright stars.

When we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the blocking and band-pass parameters to achieve an optimum result. The out of band blocking rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia OIII 3nm Pro filter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the OIII signal. Such filters are more difficult to produce to a consistently high standard.

Each filter is individually tested and scanned to ensure that the quality meets the high-performance parameters. The end result is a filter that achieves excellent contrast but with a higher production cost. We believe the price to performance ratio compares more favorably than similar premium filters in the market.

Application and Performance:

High transmittance and smallest bandwidth to maximize contrast
Steep spectral profile minimizes halos around bright stars
A single substrate to eliminate internal reflections
Narrowband Objects: OIII Emission Nebulae, Planetary, Wolf-Rayet Nebulae and Supernova Remnants
Use in light polluted areas and dark sites
Extends imaging time when the moon is up
Antlia narrowband Pro filters can be used down to F/3 systems with slight loss of signal
All Antlia Narrowband filters are edge blackened to eliminate internal reflections from stray light
Superior optical reliability reduces post image processing
This filter is not suited to deep sky objects that do not contain OIII emissions.

Technical Specifications:

Basic Substrate: Schott optical substrate
Filter Thickness
Measured thickness： 2mm+/-0.05mm for 1.25’’, 2’’ mounted, Dia31mm and Dia36mm unmounted
Measured thickness： 3mm+/-0.05mm for Dia50mm unmounted
FWHM (Full width at half maximum): 3nm
CWL (Central Wavelength): 500.7nm
Peak Transmission: ＞ 85% transmission at OIII line 500.7nm
Blocking: > 5 OD(0.001% out of band blocking) @ 300-1000nm
Surface Quality: S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830)
Transmitted Wavefront: Lambda/4 or better.
Parallelism: less than 30 arcsec
Single / Non-glued substrate

Filter Ring:

1.25’’ (M28.5*0.6)， 2’’ (M48*0.75)
Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture
Black Anodized Finish
Laser Engraving No Fading

Sizes：

Mounted： 1.25’’， 2’’
Unmounted： Dia31mm， Dia36mm， Dia50mm

Not Recommended:

Solar Observing and imaging
Visual observation
DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.
Serious eye damage will result if you fail to observe the warning.

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Niveth Kumar

Mar 14, 2025

This filter produces amazing images

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