For me, a proper cameratest starts with the mirror and having the camera checked by the rental. Resetting it all and checking for dead pixels.
I use the mirror to aligning the sensor to the test chart. Setting the crosshair in the middle of the lens, when you aim for the mirror. Testing the lenses one-by-one. Using the oldskool rule, 50 x the focal length = number of cm from chart to sensor. So a 50mm lens is to be tested at 250cm from the chart. And always checking if the lens reaches infinity.
In terms of iris, I will check it wide open, and see what the minimum t-stop must be to get the most out of the lens.
Im very curious, how do you start your test, what must-not-be-forgotten and which test chart do you prefer? Im obviously forgetting things, so feel free to add how YOU do a test.
Last year at IBC ive seen one of the most fancy charts I’ve ever seen. Loved it.
For me, the camera test starts with Rental company checking the flange focus and putting all the lenses into the collimator. Of course this is for a feature film.
Afterwards, my job becomes very easy.
I check the lenses in the closest l distance, 3 meters, 7 meters and infinity. I shoot all the tests.
Record all the cards at high speeds. Transfer them.
Shoot all nd filters as they may have color casts and it is good to know before hand.
Of there is vfx shoot a grid for each lens. Set up the horizontal, vertical bubble.
Do all the black balance, black shading if necessary.
Check connections with various devices.
Color code each camera, each accessory.
Check all cables, batteries, connections.
Clean, puf, wd40 any parts that needs it.
Lastly, I have never witnessed a Focuspuller doing a test from a mirror. Is it possible to send me a photo to show how exactly you set it up?
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|Asked: 2/9/20, 4:01 PM|
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|Last updated: 2/15/20, 9:38 AM|