Please tell him he is in good company with these other noted "Camera Obscura" adventurers:
Chinese philosopher Mo-Ti (5th century BC)
Aristotle (384-322 BC)
Islamic scholar and scientist Alhazen (c.965 - 1039)
Leonardo Da Vinci (1490)
Dutch scientist Reinerus Gemma-Frisius (1544)
Johannes Kepler (early 17th century)
ziggy53
P.S. I used to build pinhole cameras, and one that was the most fun used an old Pentax H1a with a sticky (slow) shutter. Bulb time exposures were no problem, and I put the pinhole on the end of an extension tube set, so I could change the effective "focal length", while keeping the same aperture.
camera obscura and pinhole
i have stood inside a camera obscura at the australian national museum in canberra-as ziggy points out many classical painters used them to get detail and correct perspective in their paintings-so when an art snob tells you that photography is not art then remind them of this fact and tell them to stick their chauvinism to where the sun does not shine...
a simple way of making one is to use an old lens cap with the correct diameter hole and an old cardboard tube attached to the front of your film camera,for almost infinite depth of field-plenty of resources on the web..
After Bill failed to throw a large image from his pinhole, Fredo demonstrated a more polished pinhole technique with his 20D:
With window and artificial light, it was 1/30th at 1600ISO to get an image from a pinhole. And, yes, he used extension tubes to change the focal length.
But that was all just build up to the introduction of the "thin lens":
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Chinese philosopher Mo-Ti (5th century BC)
Aristotle (384-322 BC)
Islamic scholar and scientist Alhazen (c.965 - 1039)
Leonardo Da Vinci (1490)
Dutch scientist Reinerus Gemma-Frisius (1544)
Johannes Kepler (early 17th century)
ziggy53
P.S. I used to build pinhole cameras, and one that was the most fun used an old Pentax H1a with a sticky (slow) shutter. Bulb time exposures were no problem, and I put the pinhole on the end of an extension tube set, so I could change the effective "focal length", while keeping the same aperture.
Moderator of the Cameras and Accessories forums
i have stood inside a camera obscura at the australian national museum in canberra-as ziggy points out many classical painters used them to get detail and correct perspective in their paintings-so when an art snob tells you that photography is not art then remind them of this fact and tell them to stick their chauvinism to where the sun does not shine...
a simple way of making one is to use an old lens cap with the correct diameter hole and an old cardboard tube attached to the front of your film camera,for almost infinite depth of field-plenty of resources on the web..
Longitude: 145° 08'East
Canon 20d,EFS-60mm Macro,Canon 85mm/1.8. Pentax Spotmatic SP,Pentax Super Takumars 50/1.4 &135/3.5,Pentax Super-Multi-Coated Takumars 200/4 ,300/4,400/5.6,Sigma 600/8.
After Bill failed to throw a large image from his pinhole, Fredo demonstrated a more polished pinhole technique with his 20D:
With window and artificial light, it was 1/30th at 1600ISO to get an image from a pinhole. And, yes, he used extension tubes to change the focal length.
But that was all just build up to the introduction of the "thin lens":
http://brightbytes.com/cosite/santamont.html
Moderator of: Location, Location, Location , Mind Your Own Business & Other Cool Shots
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