MLU or Mirror Lock Up Feature Is Essential For Sharp Landscape Images
To get super sharp landscape images, I use the lower 25% of my aperture range to get super sharp images. Using the MLU feature, a cable release and a tripod, I am able to get the sharpest possible images with full depth up close and way far for an image with awesome perspective and composition.
Nearly every SLR camera has a mirror that must be moved out of the way before the shutter can open and allow light to hit the film. The mirror will cause vibration in the camera that lingers while the shutter is open during longer exposures. Many landscape images are taken with small apertures to ensure sharp focus of the scene. This reduction in light must be made up by a longer shutter speed.
Here is a graph of the camera in motion when the shutter release is pressed:
The graph is small and hard to see, but in looking at the purple section, you see normal vibration. The mirror is the problem. It is essential for reflecting the image your camera "sees." However, when engaged, the mirror snaps up and hits the mirror pad causing vibration as seen in the yellow section. The pink shows the condinued "settling" of the camera even on a tripod. Most of the shake is seen in shutter speeds as fast as 1/60th of a second.
I hope this guide was helpful and that you have a better understanding of the MLU or Mirror Lock-Up Feature. If it was helpful, let me know by clicking the “YES” down below. If you would like to provide your input, I will be happy to add the information to this guide.
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