Re: Center Filter--Do I need one?

[Simon Nathan <simonwide@xxxxxxxxxxxxx>]

whoa, there
gene- the super angulon on simon/wide is 121mm focal length.it is actual
120mm but for duty purposes years ago they labeled it 121. angulon was
called 120mm. good luck. simon says

Gene F. Rhodes wrote:

 OK Sir Simon,
It's built and installed and trials will start tomorrow
at sun up. Of course, I did it my way but I won't
tell you how unless it works.
You didn't realize what a microscopic lens the
super angulon is. The front element is 29 mm,
and my new filter is 17 mm. Thanks for coming
through. You'r a nice old man Sir.
Gene----(from behind Turnpike Ford in Tulsa)
 

Simon Nathan wrote:

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dear gene- start with fourth line down. that's side view of two

inch gelatin neutral density filter. third line down is same but
you've made it 1-1/2"x2", next gel. nd sq. is 1" x2". top is
1/2"x 2". i am having trouble illustrating this with single finger
control on keyboard. what you have done is to make
centerweighted nd filter to match your lens. center has three
gel strips holding back light to makes edge nd equalize.
worked on tomiyama art   when used in 6x24cm mode.
scotch held it there, as well as together.     scale widths
f nd slices to width of from element. costs ya  lens speed
same as expensive kind. simonsays

--
II*