Explore Scientific CLS City Light Supression Filter - 1.25"
Ships by Next Business Day
Contiguous US Customers:
All items we sell ship for free within the Contiguous 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.
Explore Scientific 1.25" CLS City Light Pollution Reduction Filter. Range from 436nm to 536nm with peak at 488nm. Peak transmission 98.3%. Item # 310225.
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 CLS filter uses a characteristic property of artificial illumination. Streetlights and lamps shine in special colors - the typical colors of high-pressure or mercury lamps. The Explore Scientific CLS nebula filter blocks those colors and thereby increases contrast - the light of the celestial objects can still pass through the filter. The result is astonishing: suddenly objects are visible at locations that were completely empty without filters. In suburban skies for example, the large galaxy M101, the Veil Nebula NGC 6992, or even the bright Dumbell Nebula M27are not clearly visible. By using this filter you can see the nebulae and their structure.
A must for every visual observer. The Explore Scientific nebula filters come with a individual test certificate - your guarantee to receive a premium filter.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
Explore Scientific 1.25" CLS City Light Pollution Reduction Filter. Range from 436nm to 536nm with peak at 488nm. Peak transmission 98.3%. Item # 310225.
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 CLS filter uses a characteristic property of artificial illumination. Streetlights and lamps shine in special colors - the typical colors of high-pressure or mercury lamps. The Explore Scientific CLS nebula filter blocks those colors and thereby increases contrast - the light of the celestial objects can still pass through the filter. The result is astonishing: suddenly objects are visible at locations that were completely empty without filters. In suburban skies for example, the large galaxy M101, the Veil Nebula NGC 6992, or even the bright Dumbell Nebula M27are not clearly visible. By using this filter you can see the nebulae and their structure.
A must for every visual observer. The Explore Scientific nebula filters come with a individual test certificate - your guarantee to receive a premium filter.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
Explore Scientific CLS City Light Supression Filter - 1.25" # 310225