human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Brand, Product Name, Focal Length, 35mm EFL and equivalent aperture, Max. aperture
###Question: What is the 35mm EFL and the equivalent aperture of the lens(es) with a maximum aperture of f /2.5?
gpt
SELECT 35mm EFL and equivalent aperture FROM table WHERE Max. aperture = f /2.5