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#1
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Mechanical/film camera legacy
Hi,
ISO is 50,100, 200 ...... 3200. Now that ISO is your sensor's gain, would it make sense to make vary at 50, 60, 70 .... 3200? Same goes for other parameters that are no longer governed by worms, gears and cogs. - Siddhartha |
#2
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"Siddhartha Jain" writes:
ISO is 50,100, 200 ...... 3200. Now that ISO is your sensor's gain, would it make sense to make vary at 50, 60, 70 .... 3200? Well, some of those divisions are small enough to hardly matter. For ISO I don't think it's a big deal. But there's a certain *why not* factor since, as you say, it's not governed by worms, gears, and cogs. Same goes for other parameters that are no longer governed by worms, gears and cogs. And in fact you'll find that starting in the 1970s cameras with electronic shutters started picking shutter speeds that weren't exactly one of the usual suspects. They didn't necessarily let you set them *by hand*, though, only in auto mode, at first. And not *too* long after that they did the same for aperture. Lenses often had half-stop clicks on the aperture ring, and regardless of clicks photographers often tried to approximate intermediate settings (and with built-in light meters could do this fairly accurately). Zoom and focus were generally continuous on older equipment; though one of the complaints about some consumer digitals is that they claimed "manual focus" where they actually just let you set to one of a small list of focus distances. But I think that was a short-term stupidity. The other one I'd like is having a "super-program" mode where altering the ISO enters into the camera's calculations (I know some of the consumer models do auto-iso selection). There are times where I'd rather bump up to ISO 1600 than risk the camera shake of 1/10 second exposure, and I'm already shooting at f1.4. -- David Dyer-Bennet, , http://www.dd-b.net/dd-b/ RKBA: http://noguns-nomoney.com/ http://www.dd-b.net/carry/ Pics: http://dd-b.lighthunters.net/ http://www.dd-b.net/dd-b/SnapshotAlbum/ Dragaera/Steven Brust: http://dragaera.info/ |
#3
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"Siddhartha Jain" writes:
ISO is 50,100, 200 ...... 3200. Now that ISO is your sensor's gain, would it make sense to make vary at 50, 60, 70 .... 3200? Well, some of those divisions are small enough to hardly matter. For ISO I don't think it's a big deal. But there's a certain *why not* factor since, as you say, it's not governed by worms, gears, and cogs. Same goes for other parameters that are no longer governed by worms, gears and cogs. And in fact you'll find that starting in the 1970s cameras with electronic shutters started picking shutter speeds that weren't exactly one of the usual suspects. They didn't necessarily let you set them *by hand*, though, only in auto mode, at first. And not *too* long after that they did the same for aperture. Lenses often had half-stop clicks on the aperture ring, and regardless of clicks photographers often tried to approximate intermediate settings (and with built-in light meters could do this fairly accurately). Zoom and focus were generally continuous on older equipment; though one of the complaints about some consumer digitals is that they claimed "manual focus" where they actually just let you set to one of a small list of focus distances. But I think that was a short-term stupidity. The other one I'd like is having a "super-program" mode where altering the ISO enters into the camera's calculations (I know some of the consumer models do auto-iso selection). There are times where I'd rather bump up to ISO 1600 than risk the camera shake of 1/10 second exposure, and I'm already shooting at f1.4. -- David Dyer-Bennet, , http://www.dd-b.net/dd-b/ RKBA: http://noguns-nomoney.com/ http://www.dd-b.net/carry/ Pics: http://dd-b.lighthunters.net/ http://www.dd-b.net/dd-b/SnapshotAlbum/ Dragaera/Steven Brust: http://dragaera.info/ |
#4
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David Dyer-Bennet wrote in :
ISO is 50,100, 200 ...... 3200. Now that ISO is your sensor's gain, would it make sense to make vary at 50, 60, 70 .... 3200? Well, some of those divisions are small enough to hardly matter. For ISO I don't think it's a big deal. But there's a certain *why not* factor since, as you say, it's not governed by worms, gears, and cogs. To make a tool useful you must make some simplifications. If you can vary anything anyway you like it is simply too much work to use the camera. For manual settings you need steps for ISO, shutter speed and aperture. All those are best to adjust in logarithmic steps - usually you use full stops, 1/2 stops or 1/3 stops. When it comes to fully automatic settings you could change ISO, shutter speed and aperture any way you like. But - to simplify programming - and also simplify understanding what the camera really did when looking at the EXIF data - you do also here introduce some constraints. As far as I have seen you then use ISO in full stops, shutter time in e.g. 1/3 stops and a floating point number for aperture. All three could be floating point numbers, but that would be confusing. It is also unneccessary as high accuracy is only needed in one of the variables. /Roland |
#5
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David Dyer-Bennet wrote in :
ISO is 50,100, 200 ...... 3200. Now that ISO is your sensor's gain, would it make sense to make vary at 50, 60, 70 .... 3200? Well, some of those divisions are small enough to hardly matter. For ISO I don't think it's a big deal. But there's a certain *why not* factor since, as you say, it's not governed by worms, gears, and cogs. To make a tool useful you must make some simplifications. If you can vary anything anyway you like it is simply too much work to use the camera. For manual settings you need steps for ISO, shutter speed and aperture. All those are best to adjust in logarithmic steps - usually you use full stops, 1/2 stops or 1/3 stops. When it comes to fully automatic settings you could change ISO, shutter speed and aperture any way you like. But - to simplify programming - and also simplify understanding what the camera really did when looking at the EXIF data - you do also here introduce some constraints. As far as I have seen you then use ISO in full stops, shutter time in e.g. 1/3 stops and a floating point number for aperture. All three could be floating point numbers, but that would be confusing. It is also unneccessary as high accuracy is only needed in one of the variables. /Roland |
#6
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"Siddhartha Jain" wrote in message
oups.com... Hi, ISO is 50,100, 200 ...... 3200. Now that ISO is your sensor's gain, would it make sense to make vary at 50, 60, 70 .... 3200? Not really, since the steps in use are in stops just like shutter speed & apertures. I'm not sure much would be gained by making steps smaller than 1/3 stop. Mark |
#7
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David Dyer-Bennet wrote in :
And in fact you'll find that starting in the 1970s cameras with electronic shutters started picking shutter speeds that weren't exactly one of the usual suspects. They didn't necessarily let you I have a Yashica Electro 35, which was introduced in 1966. It features a stepless electronic shutter. It is functional from 30 seconds to 1/500 second. Great camera. My understanding is that Polaroid used the technology a few years earlier. I learned photography with the Electro 35. Great camera. It represents one of three film cameras I still own, the other two being an Olympus Stylus Epic, and an Omega 4x5. Bob -- Delete the inverse SPAM to reply |
#8
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"bob" wrote in message . .. David Dyer-Bennet wrote in : And in fact you'll find that starting in the 1970s cameras with electronic shutters started picking shutter speeds that weren't exactly one of the usual suspects. They didn't necessarily let you I have a Yashica Electro 35, which was introduced in 1966. It features a stepless electronic shutter. It is functional from 30 seconds to 1/500 second. Great camera. My understanding is that Polaroid used the technology a few years earlier. I learned photography with the Electro 35. Great camera. It represents one of three film cameras I still own, the other two being an Olympus Stylus Epic, and an Omega 4x5. I, too, have a Yashica Electro 35. Great camera but has suffered the ravishes of time and use. It was the my first 35mm SLR and I still keep it around for sentimental reasons but doubt I can ever use it again without some serious restoration. |
#9
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"bob" wrote in message . .. David Dyer-Bennet wrote in : And in fact you'll find that starting in the 1970s cameras with electronic shutters started picking shutter speeds that weren't exactly one of the usual suspects. They didn't necessarily let you I have a Yashica Electro 35, which was introduced in 1966. It features a stepless electronic shutter. It is functional from 30 seconds to 1/500 second. Great camera. My understanding is that Polaroid used the technology a few years earlier. I learned photography with the Electro 35. Great camera. It represents one of three film cameras I still own, the other two being an Olympus Stylus Epic, and an Omega 4x5. I, too, have a Yashica Electro 35. Great camera but has suffered the ravishes of time and use. It was the my first 35mm SLR and I still keep it around for sentimental reasons but doubt I can ever use it again without some serious restoration. |
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