BST 1.25" Variable Transmission Polarizing Filter
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.
- Variable 1.25” polarizing filter improves subtle detail in Moon and bright planets
- Cuts down on glare from Moon and bright terrestrial images
- Transmission continuously variable from 2-40% for a wide range of viewing situations
While observing the moon or planets, there is often too much light that washes out subtle details. This glare can be cut back using neutral density filters or polarizers. The variable polarizing filter makes this even better by stacking two polarizing filters together and combining them with a special ring that prevents the two individual filters from getting separated during normal use. By rotating the two elements, light transmission can be varied between about 2% and 40%. This filter retains true color balance since all wavelengths are transmitted uniformly over the entire spectrum.
The two polarizing elements can be unscrewed to obtain two polarizing filters which can be used for day time photography or to improve contrast in images when only a little reduction in transmitted light is desired. The filter has a standard 1.25" thread (M28.5 x 0.6) so it can be screwed on to any virtually any standard 1.25" eyepiece or accessory.
Specifications:
- Total item length (including external male thread) = 22.6mm (0.89")
- Clear aperture = 27mm (1.06")
- Weight = 0.5oz.
- Protective plastic storage case: Included
- Made in China
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
- Variable 1.25” polarizing filter improves subtle detail in Moon and bright planets
- Cuts down on glare from Moon and bright terrestrial images
- Transmission continuously variable from 2-40% for a wide range of viewing situations
While observing the moon or planets, there is often too much light that washes out subtle details. This glare can be cut back using neutral density filters or polarizers. The variable polarizing filter makes this even better by stacking two polarizing filters together and combining them with a special ring that prevents the two individual filters from getting separated during normal use. By rotating the two elements, light transmission can be varied between about 2% and 40%. This filter retains true color balance since all wavelengths are transmitted uniformly over the entire spectrum.
The two polarizing elements can be unscrewed to obtain two polarizing filters which can be used for day time photography or to improve contrast in images when only a little reduction in transmitted light is desired. The filter has a standard 1.25" thread (M28.5 x 0.6) so it can be screwed on to any virtually any standard 1.25" eyepiece or accessory.
Specifications:
- Total item length (including external male thread) = 22.6mm (0.89")
- Clear aperture = 27mm (1.06")
- Weight = 0.5oz.
- Protective plastic storage case: Included
- Made in China
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
BST 1.25" Variable Transmission Polarizing Filter