How to make the best single lens zoomie... (alternate title? we finally have a complete math model)

then theres… that lens…

looking like something along the lines of 100mm diameter… hes estimating in the one post, over 4.5 inches… closer to 5 inches?

calling an inch roughly 25mm… i get 125mm FL… in a 100mm lens… F 1.25…

but… two of them touching? F .625

which isnt TOO shabby, might work for date night in the barrio? LMAO…

(i took the liberty of starting a “lets see your coolest lenses” thread, ha ha… the boys are already starting to show off their toys they liked playing with… hee hee)

and someone with a highly figured and polishd customized MAG had a surplus shed coated aspheric looked interesting…

of course, 100mm lens? F=.625, thats a strong contender… the SINGLE lens had decent performance for him on his meter… was wondering about whacking the F number in half would do even better…