Another advantage of DSLR’s is that many allow you to shoot in RAW. Telephoto and macro options also allow a greater variety in the treatment of subjects. Depth of field can be manipulated to a greater extent especialy using wide aperture/angle lenses unavailable to compact cameras. ![]() The main advantage of a DSLR is the availablitlity of a large range of lenses allowing for more creative control over the subject when shooting. Sensor size is important to consider when choosing a DSLR as smaller sensor sizes can lead to a reduced depth of field, high crop factor and lower dynamic range. #Image capture apple pc full#The size of the sensor also varies ranging from the full frame 24x36mm sensors seen in models like the Canon EOS- 1D and the Nikon D3 to the four thirds system (26 percent of full frame) used in many Olympus models. The sensors used vary greatly and can use either charged coupled device or complemetary metal oxide semiconductor (CMOS) technology. ![]() When an image is captured the mirror swings upwards allowing the image to be projected on a sensor. Digital SLR’s use the same principles as earlier 35mm cameras using a relex mirror to direct light to the eyepiece via matte focusing screen and condensing lense. However the need for processing then scanning of images takes time and adds expense to a web design workflow. 35mm SLR cameras are now extremely cheap thanks to the explosion of digital options. The camera market is filled with potential options for capturing images from scratch. ![]() #Image capture apple pc mac osx#Mac OSX also has a screen grab application like the snipping tool called Grab, this will capture entire screen or screen selections and allows you to set a timer before any image is captured. You can also include the control button in any of the above combinations to copy the area in question to the clipboard. Pressing Command – Shift – 4 then clicking on a window will take a screenshot of the selected window and save it to desktop. Pressing Command – Shift – 4 then selecting an area will take a screenshot of an area and save it to desktop. Pressing Command – Shift – 3 will take a screenshot of the entire screen and save it to desktop. With Mac OSx there are several more options for screen grabs. #Image capture apple pc windows 7#This allows you to select only small portions of the screen to capture, you can then write over this with the pen tool or highlight areas before saving to a variety of formats.Ī fullscreen grab using PrintScrn on Windows 7 and a selected window grab using ALT - PrintScrn. Windows 7 also includes the snipping tool. If you press the alt key in combination with Print Scrn you will copy the currently selected window. Then entire screen area will then be copied to the clibboard ready to be pasted into an image editing program for cropping and further manipulation. #Image capture apple pc Pc#On the PC you have several options the simplist of these is to ensure that what you want to capture is displayed on screen then hit the Print Scrn key. Both cost a little extra but are often seen to provide a more quality result than the proprietry software.Īnother way of capturing content is with screen grabs. ![]() #Image capture apple pc software#Third party options include Lasersoft Imaging’s Silverfast software that now comes bundled with some Epson products and VueScan from Hamrick. Interfaces from the EPSON scan utility on the left and CanoScan Toolbox on the right.Ĭanon provides the CanoScan Toolbox while Epson by default uses EPSON scan. Both have advantages and disadvantages although CCD technology is generally recognised as having greater depth of field and signal noise ration and is used in the majority of modern flatbeds. Charged Coupled Device (CCD) scanners use a light source, again refected off the original that is directed by mirrors to a sensor consisting of light capturing CCD elements. Contact image Sensor (CIS) scanners use a range of red, blue and green LED’s that reflect light off the original that is then gathered by a sensor array. Flatbed scannersįlatbed scanners that first became affordable around the mid 1990’s can be divided into two types. From a web design perspective they are pretty much redundant as the resolution obtained is far in excess of that needed for display. Not only is the hardware extremely expensive and only serviced by a few remaining companies most notably Aztek but many use SCSI interfaces prompting the need for seperate cards to facilitate use with modern PC’s. The difficulties in using a drum scanner are however significant. The Howtek 4500 drum scanner and a close up showing a mounted image.
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