Ultra-Wide Lens Disclaimer: Our h-alpha filter will produce color vignetting at ultra-wide angles. This appears as green-tinted corners when using a custom white balance setting for night sky photography. We recommend using this filter with lenses no wider than 16mm for APS-C cameras, or 24mm for Full Frame cameras.
We now offer the same H-alpha Sulfur II glass used for our astrophotography conversion service as an external lens filter to be used with Full-Spectrum or Two-Spectrum converted cameras. This H-alpha astrophotography filter has a similar transmission to our IR/UV cut Hot Mirror Filter, but with expanded spectral response that covers the H-alpha and sulfur II emission lines (See transmission curves below). Now, there is nothing you can’t do with a full-spectrum camera. When used with a converted camera, these filters will provide a greater than 4 fold increase in sensitivity in the H-alpha line compared to a stock camera, and a greater than 6 fold increase in sensitivity in the sulfur II line. Our H-alpha Astrophotography filter comes standard with our Pro Slim filter rings.
- IR and UV blocking filter with enhanced h-alpha & sulfur II transmission
- Anti-reflective (AR) coated to increase light-transmission and reduce flare and ghosting
- Slim filter ring for reduced vignetting when using wide angle lenses or when stacking filters
- Front and rear threaded unlike other slim filters
- 6061 aircraft aluminum construction for a light and strong ring
- Teflon coated threading for easier installation and reduced seizing
- Finger grips for easier filter removal
At Kolari, we build our filters to last and have complete confidence in their performance. You will too with our lifetime guarantee against defects. If you find something wrong with your filter, at any time, write us at email@example.com. Visit our FAQ section for more information.
Do you accept international orders?
Absolutely! For accurate shipping costs, please enter your complete shipping address during the checkout process. Some locations may be subject to a remote area surcharge via FedEx Express. The system will not automatically calculate this surcharge. Please check the following link if your city/zip code is considered a remote area: https://www.fedex.com/content/dam/fedex/us-united-states/services/Zipcodes_OPA_ODA.pdf
If you place an order and your city/zip code is on this list, we’ll reach out to you via email to collect the surcharge.
***We legally can not declare lower values for customs and duties. We ship all of our international orders from the United States. Please note that we do not collect taxes, duties, or VAT. International customers are responsible for all duties, taxes, and VAT that may be charged by their respective local customs office. You may also be subject to a brokerage charge when you choose UPS or DHL shipping options.***
Lens filters may be returned for a store credit minus original shipping within thirty (30) days as long as they are in mint condition. 20% Restocking fee will apply to all filter returns. Buyer pays return shipping. Refund does not include original shipping charge. We are able to waive this fee if the return is processed as a store credit or exchange.