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"Pinhole S" on Kickstarter!
Bound to happen...
https://www.fujirumors.com/new-pinho...w-kickstarter- also-fujifilm-x-mount/ Make one for less than $2 with the easy to follow instructions on my site: https://wp.me/P3strj-7f Don't forget the gallery and the howto on the making and use of your own test target. While you're there... -- teleportation kills |
"Pinhole S" on Kickstarter!
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-pinho...w-kickstarter- 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 |
"Pinhole S" on Kickstarter!
In article ,
RichA wrote: 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-pinho...w-kickstarter- 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 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 one I did measured to about 1/32 but that one was made with a pin in that mackerel can! Situated behind the 5mm hole in the bodycap. Maybe Ill try to make a smaller one another day but I believe that diffraction is relative the physical size of the aperture. So the same size of hole would give you about f/64 on a FF camera and so on... -- teleportation kills |
"Pinhole S" on Kickstarter!
On 11/17/2017 7:58 PM, RichA wrote:
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-pinho...w-kickstarter- 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 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. -- PeterN |
"Pinhole S" on Kickstarter!
On 11/18/2017 2:11 PM, Ken Hart 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.Â* 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? The Holga is a good camera for those who like to look of the images. there are also pinhole and stereo models. Since it is a film camera, unless you have a wet darkroom, and/or facility for processing film, the only choice is a digital pinhole. When I wanted to play with a pinhole, I went to a friend's basement, and he drilled a centered hole in a Nikon body cap. I haven't been playing with it in the last few years. I have been known to do other things on impulse, like buying a Lensbaby and using it about three times in the last five years. -- PeterN |
"Pinhole S" on Kickstarter!
On 11/18/2017 7:21 PM, RichA wrote:
On Saturday, 18 November 2017 09:43:02 UTC-8, PeterN wrote: On 11/17/2017 7:58 PM, RichA wrote: 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-pinho...w-kickstarter- 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 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. -- PeterN Yes, the hole should be round with a knife or near knife-edge. Boring a hole in a thick material causes more problems. Not if it's done right. -- PeterN |
"Pinhole S" on Kickstarter!
In article ,
Ken Hart 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.Â* 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 |
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