From: android <here@there.was>
Subject: Re: "Pinhole S" on Kickstarter!
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From: android <here@there.was>
Newsgroups: rec.photo.digital
Subject: Re: "Pinhole S" on Kickstarter!
Date: Sun, 19 Nov 2017 06:39:40 +0100
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In article <ouq0k4$17kg$1@gioia.aioe.org>,
 Ken Hart<kwhart1@frontier.com> wrote:

> On 11/18/2017 12:42 PM, PeterN wrote:
> > On 11/17/2017 7:58 PM, RichA wrote:
> snip
> >>
> >> 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.
> >>
> > 
> > The right diameter will vary with sensor size and the distance from the 
> > hole to the sensor. Irregular diffraction will occur if the hole is not 
> > round. Besides, some diffraction is part of the beauty of a soft focus 
> > pinhole.
> > 
> > 
> 
> "the beauty of a soft focus pinhole."
> Isn't that why they make the Holga?

<https://shop.holgadirect.com/collections/pinhole>

They used to make pinholes for Canon and Nikon too but those arn't 
available right now.
-- 
teleportation kills