On the Alleged Use of Keplerian Telescopes in Naples in the 1610s

TL;DR

This paper refutes recent claims that Fabio Colonna used Keplerian telescopes in Naples in the 1610s, clarifying that such usage is historically inaccurate and based on misconceptions.

Contribution

It provides a critical historical analysis demonstrating that the alleged early use of Keplerian telescopes by Colonna is unfounded.

Findings

Keplerian telescopes were not used by Colonna in Naples in the 1610s

The misconception about Colonna's use of Keplerian telescopes is clarified

Historical evidence does not support early use of Keplerian telescopes in Naples

Abstract

The alleged use of Keplerian telescopes by Fabio Colonna (1567-1640), in Naples, since as early as October 1614, as claimed in some recent papers, is shown to be in fact untenable and due to a misconception.