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Message: <blockquote data-quote="Fred Kingston_RIP" data-source="post: 163980" data-attributes="member: 10742"><p>Below is a video that demos the SpyderLensCal... There are 2 components to adjusting the len's focus... One is the target and the other is the 45º angled plane... Focus on the target...and then read which direction the angled plane is going... The 0(zero) on the angled plane should be in focus... There is no correlation between the actual lines and numbers...they're just reference points... so if your camera is either front or back focusing, you just take a stab at the amount, add/subtract (depending on whether that lens is front or back focusing) and make an adjustment with your camera... I add/subtract 10 for a starter... Then repeat the test and take another shot... and see how much the focus point on the angled scale moved... make the necessary adjustment... Remember... the object of the exercise is to get the 0(zero) on the angled plane in sharp focus... Now, do you need a $70 calibration tool to do this? No... there are numerous focus targets on the web you can use... and by setting up a ruler as an inclined plane at 45º, you can achieve the same results... just be sure to setup the ruler so some arbitrary 0(zero) point is in the same plane as the focus target... and your camera and targets are perpendicular to each other...<a href="http://www.youtube.com/watch?v=t-JrUQO_Z5U" target="_blank">Datacolor SpyderLensCal - Autofocus calibration - YouTube</a></p></blockquote><p></p>

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