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While going through many of the "reverse lens for macro shooting" tutorials I found that I should hold my DOF preview button and then detach the lens and reverse. This would ensure the aperture lock. However, I haven't found any DOF preview button in my canon 550D DSLR. Or, am I missing something ? Please guide me.

Vinayak Kolagi
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2 Answers2

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The DoF Preview button is on the front of your camera, just below the lens release button.

picture of a 550D with the DoF Preview button circled

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On the front of the camera, bottom right of the lens mount (as you look at the front), small round button.

Digital Lightcraft
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