f1.8) Set the distance from the camera to target at 50 times the focal length of the lens (50mm = 8. From what I understand, what is being set is a value that is added or subtracted from the position that the camera is instructing the lens (or focus motor in the body for body driven lenses) to move to.
Use JPEG or Tether the Camera Set the lens to it’s widest aperture (i.e. Press the shutter-release button halfway to focus, then zoom in on the view through the lens to confirm that the subject is in focus. A properly focused system will display small patterns within the image.ġ7 The Nifty Image (cont) You can find a great article regarding focus calibration and a link to the Nifty Image at: .uk/article_pages/cameras/1ds3_af_micoadj ustment.htmlġ8 Points to Remember Set Vibration Reduction OFF
Advantages: You get immediate feedback through your computer Reporting and analysis tools are often included Some camera systems support fully automated adjustmentĪvailable in both Mac (OSX) & Windows versions Supports multiple cameras under a single license Performs multiple function test in addition to focus adjustment Spot analysis, multipoint focus test, aperture sharpness tests, AF consistency, and others All tests supported by full reportingġ2 Software (FoCal cont) Screen shot from FoCal AFMA Testġ3 Software (FocusTune) FocusTune ( Works with LensAlign targets or stand alone Available in Mac (OSX) & Windows versions Supports multiple cameras Performs multiple function test in addition to focus adjustment Spot analysis, multipoint focus test, aperture sharpness tests, AF consistency, and othersġ5 The Nifty Image This MOIRE Pattern Image can do the jobġ6 The Nifty Image (cont.) To use the Nifty Image, you display the image on a computer screen while focusing your camera on the image. Manufacturer service and adjustment DIY Use a target and adjust it yourself Software solutions are available A nifty IMAGE displayed on a monitor A combination of all the aboveħ Targets Target adjustment systems are available from several sourcesĨ Targets (cont.) Spyder Lens Cal System by DataColorĩ Targets (cont.) DIY Targets Set a high contrast target on a flat surface with a ruler set at a 45 degree angle through the targetġ0 Software Software is available to take advantage of LIVE VIEW from your camera, a standard target, and tethering your computer to your camera. Only cameras that support AF fine tuning or Lens Micro-adjustment can correct this issue NIKON: D4, D3X, D3S, D3, D810, D800, D700, D750, D610, D600 CANON: 1DX, 1DE, 1D4 1DsMk3, 5D2, 5D3, 50D, 7D PENTAX: K20 SONY: A900 Autofocus microadjustment (AFMA) is a procedure that allows a user to correct for small errors of front- or back-focusing. Presentation on theme: "Micro-focus Adjustment"- Presentation transcript:ģ Background What is it? Most commonly known as FRONT FOCUS or BACK FOCUS Occurs when the image reaches focus outside the focal plane of the camera