ZWO 31mm SII 7 nm Filter
You will be amazed by your telescope's astro-imaging capabilities with this 31 mm SII 7 nm Filter by ZWO! This filter allows you to take images that emulate those shot by the Hubble Space Telescope! All you have to do is couple the filter with an Oxygen III and Hydrogen-Alpha filter and you will be imaging like never before! Sulfur is in the deep red of the spectrum near 672 nm.
The ZWO SII 7nm 31mm Filter is unmounted. ZWO narrowband filters are fine-optically polished to reach an accuracy of 1/4 wave. Their performance is further enhanced by multiple layers of anti-reflection coatings.
For all orders exceeding a value of 100USD shipping is offered for free.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.
Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.
