# What is Hubbles WFC3 "UVIS 47 G200" filter? What is it used for? How to find an example?

Table 1: "UVIS Filter Performance Specifications from Version D JPL Spec or CEI" lists near the bottom

Fnumber  Fname   Lam0   FWHM  lam -50 ... lam +50 ... Description
-------  -----  ------  ----  -------     -------     -----------
UVIS 47  G200   2775.0  1850    1800  ...   3650  ...   UV prism


Question: What is Hubbles WFC3 "UVIS 47 G200" filter? Is it just a prism or is it a combination of a prism and a filter?

What is it used for?

How can I find an example of how it has been used in practice?