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Article ID: NSC1278 — Created: 16 Aug 2019 — Reviewed: 16 Aug 2019
When setting the initial focus for a scan or when browsing a slide, the autofocus button does not achieve good focus. In fact, the objective image is completely blurry.
This problem could be caused if the illuminator level is too high.
Lower the illuminator level by five (5) counts and re-try the autofocus button to see if it achieves good focus.
If autofocus still doesn't work, lower the illuminator level another five counts and try again.
Once focus works, if you find the image is too dark, you can use the Filter Manager to create a filter to brighten the image.
You can create an Objective Filter Sequence that includes a Look-up Table (LUT) tweaked as shown below.
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