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| Electronics > Camera & Photo > Accessories > Telescope Accessories > Filters |
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| Product Description 25-inch filter is a remarkable advance for the serious visual observer of emission nebulae. One of the biggest advantages of narrowband filters is that by passing only the light emitted by nebulae, light from artificial sources like street lights is blocked.The Celestron 93623 Narrowband Oxygen III 1. Celestron 93623 Narrowband Oxygen III 1.25 Filter Shipping Weight: 1 pounds | ||||||||
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