Improved
picture quality through mirror lock-up in SLR cameras
High-quality SLR
cameras allow you to flip the mirror up before exposure. Disruptive
vibrations caused by the mirror reverberating no longer occur in the
sensitive exposure period. Any type of vibration or motion during the
exposure of the sensor chip or film reduces the picture quality.
Vibration measurements during
image recording with a Canon EOS 350D
- 1. Mirror lock-up flips up mirror
- 2. Sensor exposure begins: The focal-plane shutter is
opened
- 3. Exposure is complete. The
focal-plane shutter and the mirror return to their original position.
The image recording sensor is exposed during phases 2 and 3. No
motion or vibrations should occur during this period. Any disruption in
this stage considerably reduces the picture quality, particularly in
the case of pictures in microscopy, macroscopy or astronomy, where the
smallest detailed areas must be in focus. A camera with mirror lock-up
should definitely be used in these cases.
Camera perspective for a Canon EOS 350 Digital with removed lens:
The mirror is in its original position,
flipped down. In this stage, the object can be observed using the
viewfinder. The recording sensor or film is protected from the light by
the closed focal-plane shutter.
In the stage between phases 1 and 2, the mirror is flipped up. It
is no longer possible to see the object through the viewfinder. The
sensor is only protected from the ambient light by the focal-plane
shutter.
The exposure takes place when the
focal-plane shutter is opened in the period between phases 2 and 3. If
the lens is removed, it is now possible to look directly at the
recording sensor.
At the end of the exposure, the
focal-plane shutter closes. The camera mirror is flipped back to its
original position. The camera is now ready to take the next picture.
For the best picture quality we recommend using a remote-control
release or using a computer to control the digital SLR camera. This is
a sure way to avoid pictures being blurred or fuzzy due to camera
shakes.
New LM digital adapter for:
Canon EOS 1Ds Mark III / Nikon D3 / Nikon D300 / Olympus E-3 / Canon EOS 450D / Digital Rebel XSi / Canon EOS 1D Mark III / Sony Alpha 350 / Olympus E-330 / Olympus E-510 / Sony Alpha 300 / Olympus E-410 / Olympus E-520 / Panasonic Lumix DMC-L10 / Pentax K20D / Canon EOS 1Ds Mark II / Canon EOS 40D / Samsung GX-20 / Leica Digilux 3 / Canon EOS 5D / Sony Alpha 700 / Canon EOS 400D / Digital Rebel XTi / Olympus E-400 / Sigma SD14 / Canon EOS 30D / Kodak DCS Pro 14n / Kodak DCS Pro SLRc / Canon EOS 1D Mark II / Canon PowerShot S80 / Kodak DCS Pro SLRn / Canon EOS 20D / Canon EOS 20Da / Canon EOS 350D / Digital Rebel XT / Canon EOS 1D Mark II N / Fujifilm FinePix S5 Pro / Olympus C-7070 Wide Zoom / Nikon D2X / Canon EOS 10D / Canon EOS 300D / Digital Rebel / Nikon D200 / Olympus C-5060 Wide Zoom / Sigma SD9 / Pentax K10D / Sigma SD10 / Nikon Coolpix 4500 / Olympus E-300 / Nikon Coolpix 990 / Olympus E-500 / Nikon Coolpix 995 / Fujifilm FinePix S3 Pro / Nikon D2Xs / Nikon Coolpix P5100 /
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