Infrared and Full Spectrum DIY Sensor Filters

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 contact@kolarivision.com. Visit our FAQ section for more information.

What is the AR coating and what does it do? The AR coating option adds an IR centered anti-reflective coating onto the IR filter we install when we perform an infrared conversion. It reduces hotspot artifacts that some lenses are prone to, and can reduce other stray reflections. On our full spectrum conversions we apply a broadband AR coating that covers the UV, visible, and IR ranges. The coating does not reduce optical performance in any way and is highly recommended.

Background:

Uncoated glass has a reflection of around 4-5% at all wavelengths, and we found that this reflection off the sensor filter was bouncing off the glass and reflecting back from the lens housing and aperture blades to cause IR hotspots.  We developed this anti-reflective coating that is centered around the IR wavelengths that cause hotspots, and reduced the 5% reflection down to <0.5%

Conversion AR Coating

When applied to our internal conversion filters, we find that hotspots are significantly reduced during infrared photography. Below is a sample from a Nikon 50mm 1.8 which has a strong hotspot at small apertures. Independent tests also available from Mark Hilliard here and Edd Noble here.

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: 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.

**Backordered Items: Please note that international orders that include backordered items will be held, and shipped together, when all items are in stock! If you need in-stock items to ship prior to this time we can do this upon your request, however, shipment of the remaining items will incur additional shipping fees. Please reach out to our customer service team if partial shipping is required.

***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 FedEx, UPS, or DHL shipping options.***