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Premium member Presentation Transcript Traditional Film Speed: Traditional Film Speed Traditional film has a grain structure The size of the grain dictates image characteristics Digital images have pixels: Digital images have pixels Image resolution: Image resolution The greater the number of pixels in the image the greater the resolution Finer image detail Sharper edges More is better Image size can be reduced: Image size can be reduced Image size can always be reduced or cropped Increasing size necessitates interpolation by the software Least desirable Grain Structure Dictates Image Characteristics: Grain Structure Dictates Image Characteristics ISO : ISO Higher the ISO the more sensitive to light Slow Speed Film 25 to 100 ISO: Slow Speed Film 25 to 100 ISO Fine grain structure Thin emulsion Large degree of enlargement Wide tonal range Little exposure latitude High inherent contrast Landscapes / documentation ‘Fast’ Film 400 and Higher ISO: ‘Fast’ Film 400 and Higher ISO Large grain structure Photography under diminished light level ‘Grainier’ appearance Greatest exposure latitude Action photography, low light Photojournalism Medium Speed 125 to 360 ISO: Medium Speed 125 to 360 ISO Intermediate characteristics General all round film Portraiture / architecture Digital Speed: Digital Speed Vary ‘speed’ at the touch of a button to suit lighting conditions It’s not free - noise Credo: Credo For the finest image - shoot at the lowest film speed setting possible under the circumstances Assume the characteristics as for film Shoot at highest resolution: Shoot at highest resolution Hindsight is 20/20 Better to reduce than increase Demands more memory Lower resolution allows more images to be stored Increasing size leads to Pixelization: Increasing size leads to Pixelization By the same token: By the same token Always save full resolution image in colour Camera may have settings for black and white or sepia etc. but best to convert copy later in other software File Formats: File Formats Jpeg .jpg, jpeg Tiff .tif, tiff Gif .gif Photoshop .psd Raw .crw JPEG: JPEG Joint Photographic Expert Group Greatest degree of compression Lossy Browser friendly Sacrifices colour for tonality JPEG settings: JPEG settings JPEG levels: JPEG levels JPEG levels: JPEG levels 12 6 1 Tagged image format .tif: Tagged image format .tif Lossless – no compression Greater memory demand LZW compression Not web friendly Graphic Interchange Format .gif: Graphic Interchange Format .gif Graphics, cartoons, solid colours Available only to indexed colour Banding in smooth transitional areas Gif: Gif Reduces image to the 256 colours available to the indexed palette for web RAW: RAW All information captured prior to camera manipulation, for information available for colour balance Lossless 8 or 16 bit colour Larger file size Photoshop .psd: Photoshop .psd Adobe Photoshop’s native format Lossless Saves layers and alpha channels Working file Resolution for purpose: Resolution for purpose Web and e-mail 72 dpi Newsletter 150 dpi Print / Photo 300 dpi BTW: BTW Lithium batteries will die between shots Never remove card while camera is writing Is it really necessary to have the date and time on the image? Film Speed: Film Speed ISO Higher the ISO the greater the sensitivity to light 100, 200, 400, 800, 1600 Film speed: Film speed Lowest ISO under the circumstances Outdoors – 100 Indoors – 400 Not free - noise Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Shallow Depth of Field: Depth of Field Deep Depth of Field: Depth of Field f 2.8 f 22 Depth of Field - Subject distance: Depth of Field - Subject distance Depth of Field - Focal length: Depth of Field - Focal length Depth of field: Depth of field Subject separated from background ‘Selective focus’ Hence - aperture priority Depth of Field: Depth of Field Picasso Photographic wannabe Depth of Field - Shallow: Depth of Field - Shallow Wide aperture – lowest number eg. f 2 Go close Long focal length Depth of field Shallow: Depth of field Shallow Depth of Field - Deep: Depth of Field - Deep Small aperture – high number eg. f 22 Far Wide angle DEP S’plains why …: S’plains why … 1.4 2 2.8 4 5.6 8 11 16 - f# I I I I I I I I 250 125 60 30 15 8 4 2 -speed Equal exposures Slide46: You do not have the permission to view this presentation. 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Digital Basic Class 3 Alohomora Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 455 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: June 15, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Traditional Film Speed: Traditional Film Speed Traditional film has a grain structure The size of the grain dictates image characteristics Digital images have pixels: Digital images have pixels Image resolution: Image resolution The greater the number of pixels in the image the greater the resolution Finer image detail Sharper edges More is better Image size can be reduced: Image size can be reduced Image size can always be reduced or cropped Increasing size necessitates interpolation by the software Least desirable Grain Structure Dictates Image Characteristics: Grain Structure Dictates Image Characteristics ISO : ISO Higher the ISO the more sensitive to light Slow Speed Film 25 to 100 ISO: Slow Speed Film 25 to 100 ISO Fine grain structure Thin emulsion Large degree of enlargement Wide tonal range Little exposure latitude High inherent contrast Landscapes / documentation ‘Fast’ Film 400 and Higher ISO: ‘Fast’ Film 400 and Higher ISO Large grain structure Photography under diminished light level ‘Grainier’ appearance Greatest exposure latitude Action photography, low light Photojournalism Medium Speed 125 to 360 ISO: Medium Speed 125 to 360 ISO Intermediate characteristics General all round film Portraiture / architecture Digital Speed: Digital Speed Vary ‘speed’ at the touch of a button to suit lighting conditions It’s not free - noise Credo: Credo For the finest image - shoot at the lowest film speed setting possible under the circumstances Assume the characteristics as for film Shoot at highest resolution: Shoot at highest resolution Hindsight is 20/20 Better to reduce than increase Demands more memory Lower resolution allows more images to be stored Increasing size leads to Pixelization: Increasing size leads to Pixelization By the same token: By the same token Always save full resolution image in colour Camera may have settings for black and white or sepia etc. but best to convert copy later in other software File Formats: File Formats Jpeg .jpg, jpeg Tiff .tif, tiff Gif .gif Photoshop .psd Raw .crw JPEG: JPEG Joint Photographic Expert Group Greatest degree of compression Lossy Browser friendly Sacrifices colour for tonality JPEG settings: JPEG settings JPEG levels: JPEG levels JPEG levels: JPEG levels 12 6 1 Tagged image format .tif: Tagged image format .tif Lossless – no compression Greater memory demand LZW compression Not web friendly Graphic Interchange Format .gif: Graphic Interchange Format .gif Graphics, cartoons, solid colours Available only to indexed colour Banding in smooth transitional areas Gif: Gif Reduces image to the 256 colours available to the indexed palette for web RAW: RAW All information captured prior to camera manipulation, for information available for colour balance Lossless 8 or 16 bit colour Larger file size Photoshop .psd: Photoshop .psd Adobe Photoshop’s native format Lossless Saves layers and alpha channels Working file Resolution for purpose: Resolution for purpose Web and e-mail 72 dpi Newsletter 150 dpi Print / Photo 300 dpi BTW: BTW Lithium batteries will die between shots Never remove card while camera is writing Is it really necessary to have the date and time on the image? Film Speed: Film Speed ISO Higher the ISO the greater the sensitivity to light 100, 200, 400, 800, 1600 Film speed: Film speed Lowest ISO under the circumstances Outdoors – 100 Indoors – 400 Not free - noise Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Depth of Field: Depth of Field Shallow Depth of Field: Depth of Field Deep Depth of Field: Depth of Field f 2.8 f 22 Depth of Field - Subject distance: Depth of Field - Subject distance Depth of Field - Focal length: Depth of Field - Focal length Depth of field: Depth of field Subject separated from background ‘Selective focus’ Hence - aperture priority Depth of Field: Depth of Field Picasso Photographic wannabe Depth of Field - Shallow: Depth of Field - Shallow Wide aperture – lowest number eg. f 2 Go close Long focal length Depth of field Shallow: Depth of field Shallow Depth of Field - Deep: Depth of Field - Deep Small aperture – high number eg. f 22 Far Wide angle DEP S’plains why …: S’plains why … 1.4 2 2.8 4 5.6 8 11 16 - f# I I I I I I I I 250 125 60 30 15 8 4 2 -speed Equal exposures Slide46: