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(More customer reviews)In addition to registering a very accurate white balance for each scene, this thing also can be used for setting the correct exposure. I was totally blown away by this little discovery and a great trick. This little thing allows you to turn your camera into a spot light meter and saves you $300!
1. Attach your Mennon WB lens cap (well, this is obvious).
2. Set your camera to manual focus and focus it to infinity.
3. Set your camera in aperture priority mode.
4. Come as close to your subject as possible, position your camera so that the lens cap plane is perpendicular to your subject AND lies in the same plane with the light source or direction of light - you'll figure it out. Make sure that you don't cast shadow on the cap with your body, and also that your cap is NOT facing the light source. Example: if you are taking a picture of a person, hold the camera so that your lens is directed upwards, and the cap is near the subject's chin.
5. Remember the shutter speed (if you are in aperture priority mode) that yields the best exposure.
6. Take WB reading.
7. Return to the position you will be shooting from. Frame your subject, and check the shutter speed reading. If it is different from the one you've just measured, switch to the manual mode, and dial in the correct shutter speed.
8. Take a shot.
9. Be amazed at how correctly your subject is exposed (your foreground and background may still have not very accurate exposure, but that's due to the difference in lighting, so reframe your shot and shoot again, if it happens).
10. I am now able to get the correct exposure in 99% of my shots. I can't rely on automatic exposure meter anymore since it almost always either underexposes or overexposes my images.
If lighting level is homogeneous at the scene (for example, in an overcast day), you can measure the exposure from any point, but it is rarely the case. Usually though if lighting is uniform, your automatic light meter is able to measure the exposure correctly, so you don't really need to use the cap. But this would happen under the assumption that your subject is 18% gray, so if it is not true - a very light or dark subject, then you should use the cap.
Good luck!
Click Here to see more reviews about: Mennon White balance lens cap 52mm
This brand new White Balance Cap made of durable plastic with neutral tone, suitable for use with any digital SLR and digital video camera with a white balance function and consists of 3 parts: filter mount, detachable cap and a hand strap. A simple instruction manual is included with the Lens Cap. To use this White Balance Cap simply attach the cap and set custom white balance on your camera.# Set the manual mode on your camera for White Balance. # Attach the lens cap to the lens. # Set the lens focus length to telephoto mode. # Aim your camera to the photographed object. # Keep the white balanced value. *Affordable for amateur and enthusiast photographers*Functions as a Lens Cap
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