![]() ![]() If you’re looking for some tutorials for how to fix CA in post-production, even without RAW image types, here are a couple of tutorials: I’ve noticed that a lot of people seem to be clamoring for it, though, so maybe have have RAW to look forward to in the future. The easiest way to fix chromatic aberration seems to be to switch the image capture to a RAW file type, but that’s not currently possible on the THETA. Your best shot is to re-frame your shot, except that, with the THETA, you pretty much just have to change locations altogether. Really, avoid high-contrast shots at all costs if you’re attempting to avoid CA. Some common conditions that cause CA to flare up are shots against white backdrops, landscape shots against a bright sky, portrait shots against a bright sky, and high-contrast shots involving fences and tree branches. The entire shot should be in focus with the THETA. ![]() Again, since the THETA’s aperture is fixed, that’s not a problem. Frequently, CA will be produced by having the depth of field too shallow. Since the THETA’s aperture is fixed, that’s going to be impossible, so we have to take some effort to keep ourselves out of situations that will produce chromatic aberration. One way to reduce CA, especially the infamous purple fringe, is to “stop down,” which means decreasing the aperture size. We can’t change out the THETA lens, so we have to be more resourceful. ![]() ![]() There will still be color error in some situations, from the secondary spectrum, but it will be significantly less than it was without the apochromatic lens. There are special lenses called “apochromatic lenses” that help mitigate these issues by focusing three wavelengths (usually red, green, and blue) into the same spot. This effect produces “soft” images, and color fringing in high-contrast situations. These extra pieces of glass focus all of the wavelengths into one spot (as best they can). We want each wavelength to end up at the same spot, which is why camera manufacturers started putting multiple pieces of glass, with different refraction properties, into camera lenses. While this doesn’t mean chromatic aberration in every case, it’s usually the culprit.Ĭhromatic aberration results from the way different wavelengths of light refract through a lens. If you don’t intentionally want your photos to look trippy, with distorted color boundaries and halo-like color bleeding, you’ve probably gotten frustrated with the way some of your photos have come out. I’ve been seeing some debates come up around chromatic aberration and the THETA, so I thought I’d look into it, considering I hadn’t heard the term before. ![]()
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