Subject: Re: "Pinhole S" on Kickstarter!
In article <firstname.lastname@example.org>,
Ken Hart<email@example.com> wrote:
> On 11/18/2017 12:42 PM, PeterN wrote:
> > On 11/17/2017 7:58 PM, RichA wrote:
> >> 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?
They used to make pinholes for Canon and Nikon too but those arn't
available right now.