![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpNjiwFaJmq8C_0CLFgfUkuPs7vW7Gaf6rBKkcQxKbIbpRjskuB0_W_BmKR-7zHuA2-k4AmgVALIRMlfdZR98xg4dHAgcOiSANYhFMf345d5xXdYXtZSxnpXQyQSveIakRMznRvs14wM2C/s320/NGC1893-small-frame.jpg)
Revision #3 - Complete rework for color balance - 7-20-08.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1pwbcXn-6qkCrqNcJFRpRqmM9oJ9xOeSor4At-f2qO8f67aJDnAwuxbIbP5FJ9Pq8DE5p24Lnd1pg3ZeFWF9tsYdhH-K3JySdoCoX9dpm8riVBe2Up_K3HM0CaeGfri4I6N2hzVlQGTEQ/s320/NGC1893-color-layer-mask4.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgk9rhf1TqGR2JhOUxQMFFy9ZlEyEHuJvbpfQl81MItbQyiNknhgXhDjbuflP2HySWno9AUBXRwci8zwbzp1_hL4z6zFYkIZqhwCotqZuKDt1UTRKp0UCadZjPWI8vGlX0GQB1CAHLDvXwI/s320/NGC1893-color-layer-mask2.jpg)
Alternate processing of NGC1893, each color channel was optimized first and then color combined in Photoshop. Selective color adjustments levels were added to the S2 (red), Ha(green) & O3(blue). Thanks to Neil Fleming for a great tutorial on this color combine method.
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