Patinas for Metal Artists
Barometric Pressure and Humidity
Photo Processes and Formulas
Science Experiments
Laboratory Procedures
Biodiesel Processing
Widefield Pair for Model PS-13
Increases the overall magnification of the Model PS-13 Stereomicroscope from 10X/30X to 15X/45X.
Fits 30.5mm i.d. ocular tubes; with groove for locking this extra widefield eyepiece.