Recall which type of microscope has a magnification less than 300x but allows you to view objects in 3D.

The type of microscope that has a magnification less than 300x but allows you to view objects in 3D is the Stereomicroscope.

Here are the steps to answer this question:

1. Understand the question: The question is asking for a type of microscope that has a specific magnification range (less than 300x) and allows 3D viewing of objects.

2. Recall knowledge about microscopes: There are several types of microscopes, each with different magnification ranges and capabilities.

3. Identify the correct microscope: The Stereomicroscope, also known as a dissecting microscope, typically has a magnification range up to 100x, which is less than 300x. It also allows for 3D viewing of the specimen, which fits the criteria given in the question.

4. Answer the question: Therefore, the answer is the Stereomicroscope.