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a collection of photos by Eric Chesak

www.ericchesak.com

  1. Galleries
  2. Infrared

Filter Tests

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700 & 800nm filter comparison
19 / 19

700 & 800nm filter comparison

This is a comparison of the Astronomik 742 and 807nm IR filters. The sky levels were adjusted to be the same in both images. This allows the filter difference to be more clearly seen.

Eric ChesakirinfraredphotographyEl PasoCanon 50DFull SpectrumAstronomik742807

  • No Filter+ Full Spectrum Canon 300D<br />
EF24-70 f2.8L @24mm<br />
1/4000<br />
F8.0<br />
ISO 100<br />
<br />
CRW_0027-No-Filter
  • 720nm filter+ Full Spectrum Canon 300D<br />
EF24-70 f2.8L @24mm<br />
1/200<br />
F8.0<br />
ISO400<br />
<br />
CRW_0012-720nm
  • 850nm Filter + Full Spectrum Canon 300D<br />
EF24-70 f2.8L @24mm<br />
1/320<br />
f8.0<br />
ISO400<br />
<br />
CRW_0018-850
  • 950nm Filter + Full Spectrum Canon 300D<br />
EF24-70 f2.8L @24mm<br />
1/25<br />
f8.0<br />
ISO400<br />
<br />
CRW_0022-950nm
  • HD (1920 x 1280) - Animated GIF of 3 IR filters (720nm, 850nm and 950nm)3-Filter animated gif - To view animated image click the image, then click the rectangular box, on the lower RHS and choose "Original" from menu. It's ~3MB, so the 3 frames will take a minute to load.
  • Smaller version of the 3 filter animated gif. (1280 x 850) - Animated GIF of 3 IR filters (720nm, 850nm and 950nm)3-Filter animated GIF.  Each frame was referenced to the same black point.  All were opened in Adobe Camera Raw and had the same adjustments. <br />
<br />
To view animation, click the image.<br />
<br />
Each frame was shot with a full spectrum Canon 40D and an EF24-70 f2.8 lens with exposures as follows (all exposed to mid histogram):<br />
<br />
720nm - 24mm, ISO 100, 1/50 s, f11<br />
850nm - 24mm, ISO 100,  1/20s, f11<br />
950nm - 24mm, ISO 100,  1/2 s, f11
  • 900nm-f5_6<br />
<br />
One frame of the many used to gather the data on the spreadsheeet.  This particular frame was shot at 900nm @ f5.6.  It was illuminated by an Tungsten/incandescent lamp (best for IR).
  • Filter Resolution Tests
  • _MG_9278-Optek<br />
<br />
Test Shot & quick grey-scale post-process, to compare the 77mm Lens-front Optek 720nm filter to the Astronomik Pro-Planet 742nm filter. No white balance adjustment was performed on this image.
  • _MG_9281-Proplanet<br />
<br />
Test Shot & quick grey-scale post-process, to compare the 77mm Lens-front Optek 720nm filter to the Astronomik Pro-Planet 742nm filter. No white balance adjustment was performed on this image.
  • 395-400nm UV LEDs shot with a Canon 7D and EF24-70 f2.8L
  • 395-400nm LED's, shot with a full spectrum Canon 40D and EF24-70 f2.8L
  • B&W converted color shot - Clear Skies - Canon 7D
  • B&amp;W converted IR shot - Clear Skies -full-spectrum Canon 40D with 720nm IR filter installed.
  • B&amp;W converted color shot - with Clouds - 30D
- Shot within 5 minutes of IR40D B&amp;W conversion
  • B&amp;W converted IR shot with Clouds - IR 40D with 720nm IR filter installed.
- Shot within 5 minutes of 30D B&amp;W conversion
  • 807nm Filter Comparison with and without UV Filter
  • 742nm Filter Comparison with and without UV Filter
  • 700 & 800nm filter comparison
  • No Comments
Unless otherwise noted, all Photos, Images and Videos are Copyright C. Eric Chesak
Unauthorized use is prohibited

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