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Thiery Legault - How to adjust the focal length ?
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Mike 🔭 Rector on Twitter: "Found a nice calculator to calculate FOV of your camera with and without a focal reducer: https://t.co/KxUdGb11nj should be able to fit the Pleiades in my FOV
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How to Use a Barlow Lens | Everything You Need to Know
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Thiery Legault - How to adjust the focal length ?
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