Colonel Blink
Pentax guide
About The Series: The focal press guides, usually but not always written by the indefatigable W. D. Emanuel are a treasure trove for collectors of cameras. Not for the sections on how to use individual cameras (which do, however contain a great deal of good sense) but for the descriptions of different models. They are the first source to go to if you want to know the difference between (for example) an Ensign Selfix 16/20 Model I and an Ensign Selfix Model II or how many elements the Trinar lens in your Regula camera has
Pentax guide
About The Series: The focal press guides, usually but not always written by the indefatigable W. D. Emanuel are a treasure trove for collectors of cameras. Not for the sections on how to use individual cameras (which do, however contain a great deal of good sense) but for the descriptions of different models. They are the first source to go to if you want to know the difference between (for example) an Ensign Selfix 16/20 Model I and an Ensign Selfix Model II or how many elements the Trinar lens in your Regula camera has