OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography

OPTOLONG 2″ O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography

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$106.79

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Product Description

Specifications:

Size

2 Inch

Thickness

2.0mm

Surface Quality

60/40 (Refer to MIL-O-13830)

Fine-optically polished

Ensure accurate 1/4 wavefront and <30 seconds parallelism over the both surfaces

Transmission

90% 

Thread

M48*0.75


Features:

- Suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants

- Suitable for viewing on bright nebulae like M42 Orion Nebula in heavy light pollution

- Use with a large aperture telescope under clear and dark viewing conditions with good seeing

- Narrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.


The Major Emission Lines of Nebulae:

H-β486.1nm OIII 495.9nm OIII 500.7nm H-α656.3nm

The Major Emission Lines of Artificial Light Pollution:

Hg 435.8nm 546.1nm 577nm 578.1nm

Na 598nm 589.6nm 615.4nm 616.1nm


Package includes:

1 x OPTOLONG OIII filter


WARNING: 

The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.

More Detailed Photos:

OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography
OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography
OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography
OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography
OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography
OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography
OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography
OPTOLONG 2" O-III Nebula Filter OIII Telescope Eyepiece Filter O3 Cuts Light Pollution Planetary Photography

Additional Information

When you order from Alexnld.com, you will receive a confirmation email. Once your order is shipped, you will be emailed the tracking information for your order’s shipment. You can choose your preferred shipping method on the Order Information page during the checkout process. Alexnld.com offers 3 different international shipping methods, Airmail, Airmail registered and Expedited Shipping Service, following are delivery times:

Airmail and Airmail Registered Area Time
United States, Canada 10-25 business days
Australia, New Zealand, Singapore 10-25 business days
United Kingdom, France, Spain, Germany, Netherlands, Japan, Belgium, Denmark, Finland, Ireland, Norway, Portugal, Sweden, Switzerland 10-25 business days
Italy, Brazil, Russia 10-45 business days
Other countries 10-35 business days
Expedited Shipping 7-15 business days to Worldwide

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