Subject: Re: "Pinhole S" on Kickstarter!
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
"the beauty of a soft focus pinhole."
Isn't that why they make the Holga?