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#21
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
"chibitul" wrote in message
... In article , (Sabineellen) wrote: Just wondering if I can "piggy-back" a cheap point-n-shoot on the back of a large format beast? why? what for? do you have any idea what a large format camera can do??? you can move the lens and the focal plane independently, achieving effects never possible with a point-n-shoot (or even a dSLR). You can get bellows lenses for Nikons, I believe, and tilt and shift lenses for Canon, that achieve much of what the bellows on a large format camera does. Can't use them on a P&S, of course, but you can use them on DSLR bodies. No AF, but at that point, who'd expect that? -- Skip Middleton http://www.shadowcatcherimagery.com |
#22
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
chibitul wrote:
In article Q2YPc.18274$Oi.4714@fed1read04, "Mark M" wrote: How will the "image act as an object" without the glass? just to clarify, the image is there regardless if you have the glass or not. The rays will keep propagating toward the digicam, and they "emerge" from the real image, no glass needed. as I said, optics. lol -- Stacey |
#23
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
"chibitul" wrote in message ... In article Q2YPc.18274$Oi.4714@fed1read04, "Mark M" wrote: How will the "image act as an object" without the glass? just to clarify, the image is there regardless if you have the glass or not. The rays will keep propagating toward the digicam, and they "emerge" from the real image, no glass needed. as I said, optics. Are you saying that you just stick the digicam in there...focus on the point where the glass WOULD HAVE BEEN...and voila...you'll get the full image???? That doesn't work. |
#24
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
"chibitul" wrote in message ... In article Q2YPc.18274$Oi.4714@fed1read04, "Mark M" wrote: How will the "image act as an object" without the glass? just to clarify, the image is there regardless if you have the glass or not. The rays will keep propagating toward the digicam, and they "emerge" from the real image, no glass needed. as I said, optics. Are you saying that you just stick the digicam in there...focus on the point where the glass WOULD HAVE BEEN...and voila...you'll get the full image???? That doesn't work. |
#25
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
"chibitul" wrote in message ... In article Q2YPc.18274$Oi.4714@fed1read04, "Mark M" wrote: How will the "image act as an object" without the glass? just to clarify, the image is there regardless if you have the glass or not. The rays will keep propagating toward the digicam, and they "emerge" from the real image, no glass needed. as I said, optics. Are you saying that you just stick the digicam in there...focus on the point where the glass WOULD HAVE BEEN...and voila...you'll get the full image???? That doesn't work. |
#26
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
"chibitul" wrote in message ... In article Q2YPc.18274$Oi.4714@fed1read04, "Mark M" wrote: How will the "image act as an object" without the glass? just to clarify, the image is there regardless if you have the glass or not. The rays will keep propagating toward the digicam, and they "emerge" from the real image, no glass needed. as I said, optics. Cameras collect lens-projected light, but they can't reach out and bend projected light at some imaginary plane and change it's direction so that it is bent toward a tiny sensor which is too small to collect the light as it is projected by the lens. Draw a picture to see why this doesn't work. The light must be bent toward the tiny confines of the sensor, or you'll get nothing but a tiny piece of the image...which would basically appear big blurry light. |
#27
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
"chibitul" wrote in message ... In article Q2YPc.18274$Oi.4714@fed1read04, "Mark M" wrote: How will the "image act as an object" without the glass? just to clarify, the image is there regardless if you have the glass or not. The rays will keep propagating toward the digicam, and they "emerge" from the real image, no glass needed. as I said, optics. Cameras collect lens-projected light, but they can't reach out and bend projected light at some imaginary plane and change it's direction so that it is bent toward a tiny sensor which is too small to collect the light as it is projected by the lens. Draw a picture to see why this doesn't work. The light must be bent toward the tiny confines of the sensor, or you'll get nothing but a tiny piece of the image...which would basically appear big blurry light. |
#28
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
In article
, chibitul wrote: just to clarify, the image is there regardless if you have the glass or not. The rays will keep propagating toward the digicam, and they "emerge" from the real image, no glass needed. as I said, optics. The problem at this point is that the light rays from the big camera's lens are radiating outward in a cone, focused on the glass screen (or film). The P&S can only ever see a tiny fraction of that cone where-ever you put it, except perhaps very close in behind the camera lens where its tiny lens can intercept the complete cone. Unfortunately the image would be wildly out of focus there, plus it would negate all the features of the large format camera you are hoping to utilise. Try it out for yourself by making a simulated LF camera with a simple magnifying glass set in a hole in a cardboard box, with a sheet of lunch wrap on the opposite side representing the glass screen. Depending on the focal length of the magnifier and the size of the box, you should be able to see a focused image on the screen. Now remove the screen and place your eye (the P&S equivalent) in the cone of light. There's no position where your eye can see a coherent image, the physics of light simply don't allow it. Focusing the P&S on the ground glass screen would work, but it would be a grotty photo. The screen is only intended to give the photographer an idea of the composition, but it it full of zillions of tiny defects that aren't a problem normally. ------ ~IRO My ambition in Life is to build something that will REALLY last....at least until I've finished building it. |
#29
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
In article
, chibitul wrote: just to clarify, the image is there regardless if you have the glass or not. The rays will keep propagating toward the digicam, and they "emerge" from the real image, no glass needed. as I said, optics. The problem at this point is that the light rays from the big camera's lens are radiating outward in a cone, focused on the glass screen (or film). The P&S can only ever see a tiny fraction of that cone where-ever you put it, except perhaps very close in behind the camera lens where its tiny lens can intercept the complete cone. Unfortunately the image would be wildly out of focus there, plus it would negate all the features of the large format camera you are hoping to utilise. Try it out for yourself by making a simulated LF camera with a simple magnifying glass set in a hole in a cardboard box, with a sheet of lunch wrap on the opposite side representing the glass screen. Depending on the focal length of the magnifier and the size of the box, you should be able to see a focused image on the screen. Now remove the screen and place your eye (the P&S equivalent) in the cone of light. There's no position where your eye can see a coherent image, the physics of light simply don't allow it. Focusing the P&S on the ground glass screen would work, but it would be a grotty photo. The screen is only intended to give the photographer an idea of the composition, but it it full of zillions of tiny defects that aren't a problem normally. ------ ~IRO My ambition in Life is to build something that will REALLY last....at least until I've finished building it. |
#30
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did anyone try this: cheap point-n-shoot on the back of a large format beast?
"chibitul" wrote in message
... yes, that is what I mean. Most cameras have a macro mode, but you can also put the camera about 0.5 meters away from the ground glass. Ok, the image is dim, but [...] It's just plain crazy to think of photograhing the ground glass. Has the OP ever looked at a ground glass? And that's only one reason. |
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