| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Hi CHUMBA, I have never seen the inside of a Samsung camera, so I can't be of any help. There is probably a filter somewhere. Maybe it is glued to..." | Read more » | about 9 years ago | |||
| CHUMBA | "Hi @cfastie, I wonder if you know How take out the IR filter from a Samsung DV150-f, I have one, I broke it, and I did not find the IR filter anywa..." | Read more » | about 9 years ago | |||
| Tbtouaki | "Hi I had wrong white balance for my camera. Thanks everyone for the help. Sorry for the trouble If anyone has any idea on how to save pictures take..." | Read more » | over 9 years ago | |||
| Tbtouaki | "Hi I have tried several white balance options before, base on what I've read. On this pics the settings were exactly the same as the maxmax camera...." | Read more » | over 9 years ago | |||
| cfastie | "Hi Rita, Your photo above (NIR1_Red3_b.jpg) will not produce very good NDVI. Most of the pixels of plants have the same value in each of the three ..." | Read more » | over 9 years ago | |||
| Tbtouaki | "Hi I currently have a modified canon (IR block removed) with a wratten 25A Red filter. My pictures are really nice looking but I have big problems ..." | Read more » | over 9 years ago | |||
| mathew | "thank you for these conversion details and trying to get to the bottom of this problem. " | Read more » | almost 10 years ago | |||
| patcoyle | "Chris, excellent well documented tips. I appreciate your continuing effort to advance the quality of results from these tools. " | Read more » | almost 10 years ago | |||
| Tbtouaki | "Hi I have several filters to put in front of the lenses and was considering which to put inside, to replace the IR filter. Thank you so much for ..." | Read more » | almost 11 years ago | |||
| cfastie | "Tbtouaki, It sounds like you have a full spectrum camera, one that has the IR blocking filter removed and nothing replacing it. By placing a filte..." | Read more » | almost 11 years ago | |||
| Tbtouaki | "How do you swap channels in an unmodified camera from RGB to NIR? What kind of camera are you using? I am really interested in this, I am photograp..." | Read more » | almost 11 years ago | |||
| nedhorning | "Hi Roolark - I don't have a spectral sensitivity curve for the A2200. I've been using LEDs to get a rough idea of spectral sensitivity but that's a..." | Read more » | almost 11 years ago | |||
| Roolark | "@Ned, do you already have a spectral sensitivity curve for the canon A2200, with its ir block filter removed (similar to the Nikon curve above)? If..." | Read more » | almost 11 years ago | |||
| mathew | "I think doing calculations based on red and green might be two ways to get to the same result that Chris was seeking in his Oaktober note-- the cha..." | Read more » | about 11 years ago | |||
| warren | "It's weird because we think of green being reflective, but compared to IR, it's very absorbent. " | Read more » | about 11 years ago | |||
| cfastie | "Mathew, That does seem to be a consistent pattern. I think you are right that a green filter might offer the purest visible light channel in a sing..." | Read more » | about 11 years ago | |||
| mathew | "looking at the sensor sensitivity graph for the Nikon D200, its interesting that green is the least sensitive channel in the infrared band, implyin..." | Read more » | about 11 years ago | |||
| cfastie | "Hi Pat, The Wratten 25A is an old standard photographic filter that is still widely available in glass and gel. I think Ned bought a genuine Kodak ..." | Read more » | about 11 years ago | |||
| patcoyle | "Thanks Chris and Ned, this is an encouraging line of inquiry. Remind me on the source for the Wratten 25 filter material, or is it in the prior not..." | Read more » | about 11 years ago |