Infrared, anybody? (Page 12): What save length of IR filter the second image you used, 720nm can't get all these color, unless using auto-WB in the camera setting!

wingclui44 Loc: CT USA

What save length of IR filter the second image you used, 720nm can't get all these color, unless using auto-WB in the camera setting!

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wingclui44 wrote:

What save length of IR filter the second image you used, 720nm can't get all these color, unless using auto-WB in the camera setting!

It was indeed 720. In post, in the GIMP, I went to Colors > Hue-Chroma and played with the chroma slider. It was just a goof.

wingclui44 Loc: CT USA

depscribe wrote:

It was indeed 720. In post, in the GIMP, I went to Colors > Hue-Chroma and played with the chroma slider. It was just a goof.

I got this with the 25A red filter.

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wingclui44 wrote:

I got this with the 25A red filter.

Cool. Have you played with the colors (hue/saturation) in post at all? You might find it fun. For instance, here's a standard auto white balance (in GIMP) and channel swap. Then I fiddled a little with the chroma. I personally prefer the first, but a lot can be done by those who prefer different effects.

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And of course, you can always then swap the red and blue channels back.

JohnSwanda Loc: San Francisco

depscribe wrote:

And of course, you can always then swap the red and blue channels back.

That's what is so great about color infrared. It's FALSE COLOR, so it can be whatever color you can come up with and like. One of the things I like about increasing the saturation, is you find colors which were somewhat hidden and bring them out.

wingclui44 Loc: CT USA

depscribe wrote:

Cool. Have you played with the colors (hue/saturation) in post at all? You might find it fun. For instance, here's a standard auto white balance (in GIMP) and channel swap. Then I fiddled a little with the chroma. I personally prefer the first, but a lot can be done by those who prefer different effects.

I did using (hue/saturation) occasionally, but I have to be careful not doing too much, if so, it will create color noise.

wingclui44 Loc: CT USA

Before learning how to do channel swap, I only used hue/saturation to manage the color, and only set the WB in camera with AWB. The images came out in very different way.

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wingclui44 wrote:

I did using (hue/saturation) occasionally, but I have to be careful not doing too much, if so, it will create color noise.

You can reduce this -- sometimes -- by moving the Overlap slider to the right.

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Yesterday I wanted to see if repairs I had made to a 35mm f1.4 Fuji lens had done any good. I ended up with a picture I kinda like. The flowerpot, btw, is dark green in visible light. (As, of course, is the plant.) OOC but for auto white balance and channel swap in GIMP as post.

wingclui44 Loc: CT USA

depscribe wrote:

Yesterday I wanted to see if repairs I had made to a 35mm f1.4 Fuji lens had done any good. I ended up with a picture I kinda like. The flowerpot, btw, is dark green in visible light. (As, of course, is the plant.) OOC but for auto white balance and channel swap in GIMP as post.

Some time I use the 'define' tool to reduce the noise.

I'm still waiting the 680nm filter, Amazon said it's on the way. I like to compare it with my 25A red filter.

Here's aimage taken with the 25A, I really like the color it produced.

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wingclui44 wrote:

Here's aimage taken with the 25A, I really like the color it produced.

You might find it fun to play around with the various choices in hue/saturation some more. Also the highlights/shadows -- it's amazing the stuff you can bring out of the mud and out of what at first seems blown out. This isn't to criticize what you're doing but instead to suggest you can open even more doors to the pictures you're making with the 25A.

wingclui44 Loc: CT USA

depscribe wrote:

You might find it fun to play around with the various choices in hue/saturation some more. Also the highlights/shadows -- it's amazing the stuff you can bring out of the mud and out of what at first seems blown out. This isn't to criticize what you're doing but instead to suggest you can open even more doors to the pictures you're making with the 25A.

Will do, thank you! I like to maintain certain level of contrast.

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Today was the most beautiful day since creation -- sunny, with puffy fair-weather clouds, low humidity, about 70 degrees. On the way home from the grocery store I decided to stop by the Stewart, Ohio, town cemetery. Had the IR-converted fuji and a 21-mm equivalent (or as i like to call it, normal) lens. and among the pictures I made was this, of the grave of town artist and poet and crackpot (in the best sense of the word) Charles Byron. The epitaph above his name is interesting. But he was an interesting guy. Made a few other pictures there, too.

wingclui44 Loc: CT USA

depscribe wrote:

Today was the most beautiful day since creation --... (show quote)

Nice!
My 680nm filter finally came last week, it looks a little bit brighter than the 720nm, I didn't have a good chance to test it due to the weather, I did take some shot under cloudy sky, it showed not as brilliant as my 25A. Here the shot with 680nm: The library in our town.

Another one taken with the 25A, that it gives me more option of color to play with.

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