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Saved by uncleflo on January 6th, 2019.
In 2000, the International Standards Organization adopted ISO Standard 12233: Photography -- Electronic still-picture cameras - Resolution measurements for the measurement of camera resolution. This standard is protected by copyright, but the design of the associated test chart seems not to be protected; its description has been available on the Web in an Excel spreadsheet. I have semi-manually converted this to an Adobe Illustrator file which is displayed here. In 2014 and again in 2017, the ISO revised the standard and the chart below was replaced by several new ones. Those new charts are not available here. In principle, you should be able to print this chart and perform resolution tests on your camera. The reality isn't that simple; there are lots of subtleties having to do with focus distance, quality and contrast of your printer, evenness of illumination, surface reflections, etc.
print raster spreadsheet pixel reproduce resolution imaging squares illustrator computational outline optical cheap precision expect compliance chart measurement measuring properly file camera perform assessment standard resource howto test testing photographer performance analysis distortion revise focus
Saved by uncleflo on January 4th, 2019.
DC powered watermakers - will run from your 12V or 24V DC battery system using energy recovery pumps to minimise power consumption. With blue water sailing becoming more and more popular, watermakers are now being considered a necessity rather than a luxury for that long passage. Choosing the right watermaker can be a difficult decision; with many factors to consider to ensure you get the right model for your needs. We have many years experience in watermakers, and have seen them develop from the rudimentary and sometimes tempremental models of 10 years ago to the sophisticated, reliable, low maintenance models of today. Consider how much water you need to make, how much space you have available for installation and most importantly, how much power you have available. Our range of units offer marine watermakers for all applications - just talk to us to see what the best choice is for your boat. We offer our clients free support in Las Palmas for ARC entrants. Class leading quality Italian made watermakers, low power consumption using the latest energy recovery technology, rugged construction using 316 stainless and carbon fibre. With the raiman system you simply purchase the pressure supply unit of your choice (electrical or petrol powered) and the membrane set to produce the amount of water you require. USA made watermakers using energy recovery system.
Units from 25 lites per hour upwards, Latest MPC computer controlled operation.
We know Spectra inside out - many years experience in sales & service.
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