Explore Scientific O-III Nebula Filter - 1.25" # 310205

Our Price: $79.99
Free shipping for this item in the US Click here for more info

Continental US Customers:
All items we sell ship for free within the Continental US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.

US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.

International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.

In stock (2 Available)
Ships by Next Business Day
Our Product ID: OFIL-ES-310205
Manufacturer SKU: 310205
Item Can Ship: Worldwide
Explore Scientific O-III Nebula Filter - 1.25" # 310205

More Views

  • Explore Scientific O-III Nebula Filter - 1.25" # 310205
  • Explore Scientific O-III Nebula Filter - 1.25" # 310205
  • Explore Scientific O-III Nebula Filter - 1.25" # 310205

Product Details

Explore Scientific 1.25" Oxygen-III Nebula Filter. Range from 483nm to 511nm with peak at 496nm. Peak transmission 96.7%. Item # 310215.

One of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lights such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the solar systems enormously. Depending on the type of the celestial object it is possible to increase the contrast dramatically by blocking the annoying artificial light.

The Explore Scientific O-III filter uses a characteristic property of the so called emission nebulae. Those objects glow in special colors, the so called emission lines. Those emission lines are linked to chemical elements - in this case Oxygen. The Explore Scientific O-III nebula filter blocks all other colors (and thereby nearly all of the artificial light) and only the two emission lines of oxygen can pass the filter. The result is astonishing: suddenly nebulae are visible at locations that were completely empty without filters. In suburban skies for example, the Veil Nebula NGC 6992 is almost not visible with a 200mm telescope. By using this filter you can see the nebula and its structure without problems.

A must for every visual observer. The Explore Scientific nebula filters come with a individual test certificate - your guarantee to receive a premium filter.

Product Questions & Answers

No questions yet. Be the first to Ask a Question.