December 18, 2014

Comparing a generic UV/IR Cut filter vs Kolari Vision's Hot Mirror Filter

After doing a full-spectrum convert for a digital camera, the colors are "off". The sensor is very sensitive to the IR part of the spectrum.

Auto White Balance after the internal filter is removed from the camera. ISO:1600 f/4.5 @1/10th

This is awesome because you can equip different infrared filters to the lens to get some amazing pictures.

But what if you want to return your camera back to "normal". Well, you have a couple of options. The cheapest is to buy a UV/IR Cut filter off ebay. If you pick a China provider, you can get one for ~$25USD.

The other option is to buy a more expensive Hot Mirror filter for around $90USD (varies depending on filter diameter).


UV/IR Cut filter

UV/IR Cut filter for the lens purchased from ebay for $25  ISO:1600 f/4.5 @1/6th
This does a pretty good job. And if you manually adjust the white balance you can mostly return the camera back to it's original function.

UV/IR Cut filter with manual white balance applied.
I find that some reds look a bit more orange even with manual white balance.

Kolari Vision's Hot Mirror Filter

Kolari Vision's Hot Mirror Filter for $90 ISO:1600 f/4.5 @1/5th
With the Kolari Vision's filter, the camera's Auto White Balance feature works as expected.

Notice that there is a slight exposure difference. This is expected. It's actually a nice feature to take very low light b/w photos by going filter-free.

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