Ah, a lively discussion, which is what, I like to see. I check the RFF site quite often and skip most of the subjects unless they interest me in some way. I also know I should get of my butt and use some of my many Canon Rangefinder lenses I own so as I can enter into some of the discussions on why this lens is better than others in regards to Bokeh, vignette, contrasts etc and now the book is out of the way I will. I also knew that Nikon placed a colon after the serial # but Rotoloni (I have his books and NHS journals) is still unsure why and can only theorize. Another small thing that intrigued me was when Nikon collectors were mentioning a certain “tick” mark on F series lenses and by Googling, I found out what it was and why these lenses sell sometimes for high prices. All these small additions add to the knowledge of Nikon and likewise to other makes. My main aim and still is, is to broaden the knowledge on Canon RF gear, as there was nothing out there in the English language other than Peter Dechert’s book. Maybe now people who have purchased my book will realise that certain Canon RF Lenses are unique. I suppose I got a bit uptight about the “bored” remark but life is anything but that. Anyway, I will keep adding dribble to this forum, as there is really nowhere else to have a discussion or put a point across where people who are interested in other makes can access a variety of information besides variety is the spice of life. Peter