Symptom

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.

Image Before Auto-Focus

Image After Auto-Focus

Cause

Auto-Focused Image
After Lowered Illuminator Level

This problem could be caused if the illuminator level is too high.

Resolution

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.

Creating a Filter to Brighten the Image

You can create an Objective Filter Sequence that includes a Look-up Table (LUT) tweaked as shown below.

Filter Manager

Auto-Focused Image with Filter