Astronomy Specialist

SKU: AN-HB-OIII1.25

ANTLIA H-BETA & OIII VISUAL FILTER 1.25"

Regular price $179.00AUD

Antlia

  • 20 nm


 

The Antlia H-Beta and OIII filter is designed for visual observation of emission & planetary nebulae and supernova remnants under light polluted skies. It has >90% transmission at both OIII 500.7nm & 495.9nm and H-Beta at 486.1nm. The optical density of OD4 suppresses unwanted wavelengths from light pollution, moonlight and skyglow, resulting in excellent contrast. It can also be used for photography with colour cameras and cuts out both the UV and IR ends of the spectrum.

To even further enhance the contrast, and suppress the stray light and internal reflections, Antlia applies edge-blackening coating on each filter. Each filter is individually tested to ensure a high quality standard. The tight tolerance of the filters substrate assure a maximum deviance of ±0.05 from specifications making these filters parfocal.

DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS. Serious eye damage will occur.

 

Specifications

 

Passing band H-b, OIII
Glass thickness

2.0 mm ±0.05

Optical flatness

1/4 λ (wavefront)

Bandpass transmission >90%
Off-band transmission OD4 @ 300-1000 nm
Coating Double-sided multilayer nano-coating
Surface quality 60/40 (in accordance with US military watch MIL-O-13830)
Parallelism 30"
SKU
AN-HB-OIII1.25


Customer Reviews

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M
Ms Annika Soraya
AWESOME DEVICE!

TESTAR DELIVER WONDERFUL PRODUCTS AND EXCEPTIONAL ADVICE.

THIS TEAM OF PROFESSIONALS ARE AMONG THE BEST THERE IS . . .

ANTLIA UHC FILTER IS EXTRAORDINARY FOR VISUAL PURPOSES BECAUSE IT REALLY DOES BRIGHTEN THE VIEW, STRIKING A PERFECT BALANCE OF CONTRAST.

TRY TESTAR TODAY FOR ALL YOUR ASTRONOMY AND ASTROPHOTOGRAPHY NEEDS!

I CANNOT RECOMMENDED THIS RETAILER HIGHLY ENOUGH.

THANKS ADRIANO, JAMIE AND COLLEAGUES . . . YOU GUYS REALLY ARE THE BEST!