From: RichA <rander3128@gmail.com>
Subject: Re: "Pinhole S" on Kickstarter!
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Date: Fri, 17 Nov 2017 16:58:18 -0800 (PST)
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Subject: Re: "Pinhole S" on Kickstarter!
From: RichA <rander3128@gmail.com>
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On Friday, 17 November 2017 08:02:52 UTC-8, Ken Hart  wrote:
> On 11/17/2017 09:22 AM, Whisky-dave wrote:
> > On Friday, 17 November 2017 13:25:35 UTC, android  wrote:
> >> Bound to happen...
> >>
> >> <https://www.fujirumors.com/new-pinhole-pro-s-wide-angle-now-kickstar...
> >> also-fujifilm-x-mount/>
> >>
> >> Make one for less than $2 with the easy to follow instructions on my
> >> site:
> >>
> >> <https://wp.me/P3strj-7f>
> > 
> > Strange term pinhole for a 5mm or so hole ;-)
> > 
> > I remmeber the days when a pinhole was made with a pin.
> > 
> 
> Just my guess, but my first thought was that the actual pinhole was 
> behind the visible 5mm or so hole. I wouldn't think you could get the 
> level of sharpness seen in the samples with a 5mm hole.
> 
> > Nice idea, but I'll still have to find one of my body caps, maybe I should just buy a box of 10
and have done with it !
> > 
> > I'm hoping to find some hidden where the other socks of the pair have gone.
> >   
> > 
> > 
> >>
> >> Don't forget the gallery and the howto on the making and use of your own
> >> test target. While you're there...
> >> -- 
> >> teleportation kills
> > 
> 
> 
> -- 
> Ken Hart
> kwhart1@frontier.com

f/128 is the right diameter for a given sensor size, as I recall, but that's a guess.  Precision
pinholes cost money (consult a professional optics house) and if they aren't precision, various
unwanted aberrations can creep in, notably, irregular diffraction.