Primo depth of field charts pdf Maple
By Jeff Conrad for the Large Format Page Depth of Field is the total distance, on either side of the point of focus, appears to be sharp in the final print. An important point: Depth of field is perceived. That means that these numbers are NOT exact. If you make a 4x6 print you may get the results you expect. With a 16x20 print, you may find your depth of field was MUCH less. Always
Depth of field Wikipedia
DOFMaster Free Download - Tucows Downloads. Download the Free Shutter Speed Chart PDF , for reference, while reading the in-depth photography guide, below. Shutter speed photography settings, combined with ISO , and f-stop (controls aperture) , give the photographer ultimate creative control over the photograph & the exposure triangle ., Due to similarities in name and nature, depth of field and depth of focus are commonly confused concepts. To simplify the definitions for our purposes, depth of field concerns the image quality of a stationary lens as an object is repositioned, whereas depth of focus concerns a stationary object and a sensor’s ability to maintain focus for different sensor positions, including tilt..
Graphical Depth-of-Field Chart. This is a graphical depth-of-field chart (with generic exposure guide) that I've worked up for the Minolta 16-II. Distribute freely. (The copyright line is just for vanity, and to hold a revision number.) For those interested in playing with this thing, I have produced various file formats: Depth of field is determined by aperture, lens focal length, and the distance to the subject: Aperture: Wider apertures (lower f-numbers) reduce depth of field, smaller apertures (higher f-numbers) increase depth of field. Lens focal length: Longer focal lengths reduce depth of field, shorter focal lengths increase depth of field.
depth values at T/8.0 will be the depth obtained at a criterion for definition corresponding to a disc of confusion of 0.002 inches (footage-scaled) or 0.05mm (metric-scaled) if the lens is set at T/4.0. Hyperfocal Distance Chart for APS-C Cameras Metric System (distances in meters) Imperial System (distances in feet) Focal Length Aperture 16 mm 20 mm 24 mm 28 mm 35 mm 50 mm
field as possible. Lateral Depth and Spacing A relationship exists between depth and spacing of drains. For soils of uniform permeability, the deeper the drains, the wider the spacing (within limits). Higher permeability soils can have greater spacing Need to provide adequate root depth above the saturated zone. S d. Lateral Depth and Spacing A relationship exists between depth and spacing of This Depth of Field (DoF) calculator will help you get the creative control on the design of your photos. Decide the zone of sharpness you need to tell the story you want and get your message across. Decide the zone of sharpness you need to tell the story you want and get your message across.
Depth of field is bounded by two distance measures: near and far, where near is the closest distance (to the camera) that subjects appear to be sharp and far is the shortest distance beyond which subjects look out-of-focus (or longest distance within which subjects appear to be in-focus). Depth of Field Chart. Large Format Camera tools. Calculate depth of field and bellows extension compensation. Select format: 4x5 8x10. Beta v0.10 - 19. jan. 2017 - added 8x10 inches; Developed by: AndrГ© Eide - Instagram - Facebook
Depth of field is determined by aperture, lens focal length, and the distance to the subject: Aperture: Wider apertures (lower f-numbers) reduce depth of field, smaller apertures (higher f-numbers) increase depth of field. Lens focal length: Longer focal lengths reduce depth of field, shorter focal lengths increase depth of field. charts. On the line corresponding to normal (6/6; 20/20 in the United States) vision, a On the line corresponding to normal (6/6; 20/20 in the United States) vision, a letter subtends 5 minutes of arc.
Depth of field is bounded by two distance measures: near and far, where near is the closest distance (to the camera) that subjects appear to be sharp and far is the shortest distance beyond which subjects look out-of-focus (or longest distance within which subjects appear to be in-focus). schneider_variogon-and-optivaron_depth-of-field_chart.pdf Loading…
Depth of Focus vs Depth of Field (DOF) – To clear up any confusion, these terms mean the same thing. They can be used interchangeably with focus range and DOF. They can be used interchangeably with focus range and DOF. Focal length in parentheses = Epson R-D1 equivalent field of view (CoC = 0.018 mm) Distances: in feet and inches. those over 10" rounded up/down to nearest foot
DoF 4.0 – A Depth of Field Calculator Last updated: 20-Apr-2017 Introduction When you focus a camera lens at some distance and take a photograph, the further subjects are from the focus point, the blurrier they look. Depth of field is the range of subject distances that are acceptably sharp. It varies with aperture and focal length, depth values at T/8.0 will be the depth obtained at a criterion for definition corresponding to a disc of confusion of 0.002 inches (footage-scaled) or 0.05mm (metric-scaled) if the lens is set at T/4.0.
They maximize DOF (depth of field), the region of acceptable sharpness, by focusing at the hyperfocal distance. A simple function of lens focal length, aperture and the diameter of the Circle of Confusion. The wider the angle of a lens, the shorter its focal length and deeper depth of field. So, as an example, an 18mm lens will have deeper Depth of Field Calculations and Constants for the Cooke Range of S4 Prime Lenses . Jonathan Maxwell and Michael Hamilton, Cooke Optics Ltd, Leicester, Issue 23/9/02
Just set the focus distance, and read the near and far distances. It's as easy to use as the depth-of-field scales of old. Print a scale for any lens and any format, digital to 8x10. For a zoom lens, make a scale with as many as four focal lengths. Depth-of-Field Calculator * ** To find the near, far and hyperfocal distance for a specific lens, enter the focal length (mm), aperture (f/number) and the object distance (whole or decimal number). The JavaScript program will calculate the near, far, depth and hyperfocal distances. The unit of measure for distances is feet. This can be
If you zoom into 100mm from the same spot, the depth of field changes to 9.2-10.9m (30.1-35.8′) for a total of 1.7m (5.7′) of depth of field. But if you move to 20m (66′) away from your subject using the 100mm lens, your depth of field is almost the same as it would be at 10 meters using a 50mm lens. Depth of field is determined by aperture, lens focal length, and the distance to the subject: Aperture: Wider apertures (lower f-numbers) reduce depth of field, smaller apertures (higher f-numbers) increase depth of field. Lens focal length: Longer focal lengths reduce depth of field, shorter focal lengths increase depth of field.
Depth of Field (DoF) calculator PhotoPills
Graphical Depth-of-Field Chart Subminiature Camera Stuff. How to use the DoF Table. This depth of field chart is the fastest way to have your DoF calculations done. Also, it comes in very handy to visualize how depth of field changes with aperture and subject distance for the selected camera and focal length., Focus Pocus Depth of Field Calculators For Digital and Film Cameras Have a Digital Camera? Before using the basic calculators on this page or the Chart Makers for a digital camera, you must determine your digital camera's Lens Multiplier Factor (LMF) which is simple to do. Hyperfocal Calculator.
Depth of field Wikipedia. Just set the focus distance, and read the near and far distances. It's as easy to use as the depth-of-field scales of old. Print a scale for any lens and any format, digital to 8x10. For a zoom lens, make a scale with as many as four focal lengths., Photography Neutral Density (ND) Reference Chart Bare Meter Reading = 1/8000 1/4000 1/2000 1/1000 1/500 1/250 1/125 1/60 1/30 1/15 1/8 1/4 1/2 1s 2s 4s 8s 15s 30s ND2 (1) 1/4000 1/2000 1/1000 1/500 1/250 1/125 1/60 1/30 1/15 1/8 1/4 1/2 1s 2s 4s 8s 15s 30s 1m.
Depth of Field and Depth of Focus Edmund Optics
Depth of Field and Depth of Focus Edmund Optics. For many cameras, depth of field (DOF) is the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image.The depth of field can be calculated based on focal length, distance to subject, the acceptable circle of confusion size, and aperture.A particular depth of field may be chosen for technical or artistic purposes. Depth of Field and Depth of Focus: Enter 3 figures in the column and click "calculate"..
Depth of Field Outside the Box by Richard F. Lyon
Depth of Field and Depth of Focus: Enter 3 figures in the column and click "calculate". Hyperfocal Distance Chart for APS-C Cameras Metric System (distances in meters) Imperial System (distances in feet) Focal Length Aperture 16 mm 20 mm 24 mm 28 mm 35 mm 50 mm
23/08/2014В В· Whats the best depth of field calculator available for the iphone for canon systems? Got a 5dmIII and a SLEW of canon lenses... Thnx!!! I'm not sure if it ethical to raise such an old topic from the dead, but maybe someone will still find it useful. I'd like to add my 5 cents by recommending LensTutorial, it is a free visual iOS app for Depth-of-Field Calculator * ** To find the near, far and hyperfocal distance for a specific lens, enter the focal length (mm), aperture (f/number) and the object distance (whole or decimal number). The JavaScript program will calculate the near, far, depth and hyperfocal distances. The unit of measure for distances is feet. This can be
MFT format Full Format Depth of Field Tables in Meter for Compact Zoom CZ.2 70-200mm/T2.9 for ANSI Super 35, Normal 35, APS-H and APS-C Format Just set the focus distance, and read the near and far distances. It's as easy to use as the depth-of-field scales of old. Print a scale for any lens and any format, digital to 8x10. For a zoom lens, make a scale with as many as four focal lengths.
A football depth chart template format can also feature the players as per their designated position on the field- such as quarterback, kicker, wide receiver and so on. These Free Chart Templates are great time –savers as they offer you a readymade depth chart where … Just set the focus distance, and read the near and far distances. It's as easy to use as the depth-of-field scales of old. Print a scale for any lens and any format, digital to 8x10. For a zoom lens, make a scale with as many as four focal lengths.
Once you have done this, the depth of field calculator can then be used to enhance those carefully planned landscape, macro, and low-light images where the range of sharpness is critical. For a more in-depth background on this topic, please see: "Understanding Depth of Field" Focal length in parentheses = Epson R-D1 equivalent field of view (CoC = 0.018 mm) Distances: in feet and inches. those over 10" rounded up/down to nearest foot
23/08/2014 · Whats the best depth of field calculator available for the iphone for canon systems? Got a 5dmIII and a SLEW of canon lenses... Thnx!!! I'm not sure if it ethical to raise such an old topic from the dead, but maybe someone will still find it useful. I'd like to add my 5 cents by recommending LensTutorial, it is a free visual iOS app for depth of field (in object space) is the same. • Might be counter intuitive. • Very useful for macro where DoF is critical. You can change your working distance without affecting depth of field • Now what happens to the background blur far far away?
Bokeh simulator and depth of field calculator. This application interactively calculates the camera depth of field and background blur and visually simulates it on a photo together with different types of lens blur (bokeh) for any lens, camera and distance combination. Activating the help mode shows descriptions of the interface elements. They maximize DOF (depth of field), the region of acceptable sharpness, by focusing at the hyperfocal distance. A simple function of lens focal length, aperture and the diameter of the Circle of Confusion. The wider the angle of a lens, the shorter its focal length and deeper depth of field. So, as an example, an 18mm lens will have deeper
29/02/2012 · This video explains what depth of field is, how it works, and how to control it. While some concepts are simplified a good deal, it should help you get a good understanding of depth of field. I depth of field (in object space) is the same. • Might be counter intuitive. • Very useful for macro where DoF is critical. You can change your working distance without affecting depth of field • Now what happens to the background blur far far away?
Hyperfocal Distance Chart for APS-C Cameras Metric System (distances in meters) Imperial System (distances in feet) Focal Length Aperture 16 mm 20 mm 24 mm 28 mm 35 mm 50 mm Just set the focus distance, and read the near and far distances. It's as easy to use as the depth-of-field scales of old. Print a scale for any lens and any format, digital to 8x10. For a zoom lens, make a scale with as many as four focal lengths.
If you zoom into 100mm from the same spot, the depth of field changes to 9.2-10.9m (30.1-35.8′) for a total of 1.7m (5.7′) of depth of field. But if you move to 20m (66′) away from your subject using the 100mm lens, your depth of field is almost the same as it would be at 10 meters using a 50mm lens. Depth of Field Definition. Depth of field refers to the section of a photograph that appears to be in sharp focus. John Shaw's Nature Photography Field Guide, John Shaw, 2000 . The depth of field is defined as the area in front of and behind the subject that is in acceptable focus. Night and Low-Light Photography Workshop, Alan Hess, 2011
Depth-of-Field Calculator Fine Art Photography
Depth-Of-Field Hyperfocal Distance Charts ePHOTOzine. charts. On the line corresponding to normal (6/6; 20/20 in the United States) vision, a On the line corresponding to normal (6/6; 20/20 in the United States) vision, a letter subtends 5 minutes of arc., For many cameras, depth of field (DOF) is the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image.The depth of field can be calculated based on focal length, distance to subject, the acceptable circle of confusion size, and aperture.A particular depth of field may be chosen for technical or artistic purposes..
Understanding Depth of Field for Beginners
Tools Canon depth-of-field calculator Canon. Depth of Field is the total distance, on either side of the point of focus, appears to be sharp in the final print. An important point: Depth of field is perceived. That means that these numbers are NOT exact. If you make a 4x6 print you may get the results you expect. With a 16x20 print, you may find your depth of field was MUCH less. Always, Bokeh simulator and depth of field calculator. This application interactively calculates the camera depth of field and background blur and visually simulates it on a photo together with different types of lens blur (bokeh) for any lens, camera and distance combination. Activating the help mode shows descriptions of the interface elements..
charts. On the line corresponding to normal (6/6; 20/20 in the United States) vision, a On the line corresponding to normal (6/6; 20/20 in the United States) vision, a letter subtends 5 minutes of arc. A football depth chart template format can also feature the players as per their designated position on the field- such as quarterback, kicker, wide receiver and so on. These Free Chart Templates are great time –savers as they offer you a readymade depth chart where …
06/06/2006В В· The charts above show a graphical representation of DoF at different distances. Chart 1: Shows how mush DoF that you will get using a 50mm lens. That is total area coverage that will be in focus. Y-axis shows the depth of field, of depth of focus. X-axis shows how far the subject is away. Different lines indicate different f-numbers Focal length in parentheses = Epson R-D1 equivalent field of view (CoC = 0.018 mm) Distances: in feet and inches. those over 10" rounded up/down to nearest foot
Depth of field is determined by aperture, lens focal length, and the distance to the subject: Aperture: Wider apertures (lower f-numbers) reduce depth of field, smaller apertures (higher f-numbers) increase depth of field. Lens focal length: Longer focal lengths reduce depth of field, shorter focal lengths increase depth of field. Depth of field is determined by aperture, lens focal length, and the distance to the subject: Aperture: Wider apertures (lower f-numbers) reduce depth of field, smaller apertures (higher f-numbers) increase depth of field. Lens focal length: Longer focal lengths reduce depth of field, shorter focal lengths increase depth of field.
Photography Neutral Density (ND) Reference Chart Bare Meter Reading = 1/8000 1/4000 1/2000 1/1000 1/500 1/250 1/125 1/60 1/30 1/15 1/8 1/4 1/2 1s 2s 4s 8s 15s 30s ND2 (1) 1/4000 1/2000 1/1000 1/500 1/250 1/125 1/60 1/30 1/15 1/8 1/4 1/2 1s 2s 4s 8s 15s 30s 1m DoF 4.0 – A Depth of Field Calculator Last updated: 20-Apr-2017 Introduction When you focus a camera lens at some distance and take a photograph, the further subjects are from the focus point, the blurrier they look. Depth of field is the range of subject distances that are acceptably sharp. It varies with aperture and focal length,
Bokeh simulator and depth of field calculator. This application interactively calculates the camera depth of field and background blur and visually simulates it on a photo together with different types of lens blur (bokeh) for any lens, camera and distance combination. Activating the help mode shows descriptions of the interface elements. Depth of Field is the total distance, on either side of the point of focus, appears to be sharp in the final print. An important point: Depth of field is perceived. That means that these numbers are NOT exact. If you make a 4x6 print you may get the results you expect. With a 16x20 print, you may find your depth of field was MUCH less. Always
For many cameras, depth of field (DOF) is the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image.The depth of field can be calculated based on focal length, distance to subject, the acceptable circle of confusion size, and aperture.A particular depth of field may be chosen for technical or artistic purposes. How to use the DoF Table. This depth of field chart is the fastest way to have your DoF calculations done. Also, it comes in very handy to visualize how depth of field changes with aperture and subject distance for the selected camera and focal length.
If you zoom into 100mm from the same spot, the depth of field changes to 9.2-10.9m (30.1-35.8′) for a total of 1.7m (5.7′) of depth of field. But if you move to 20m (66′) away from your subject using the 100mm lens, your depth of field is almost the same as it would be at 10 meters using a 50mm lens. 23/08/2014 · Whats the best depth of field calculator available for the iphone for canon systems? Got a 5dmIII and a SLEW of canon lenses... Thnx!!! I'm not sure if it ethical to raise such an old topic from the dead, but maybe someone will still find it useful. I'd like to add my 5 cents by recommending LensTutorial, it is a free visual iOS app for
depth of field in the right-hand image than in the left-hand image. Traditionally, we would say that the right-hand image has less depth of field because it was shot with a longer focal length, and longer focal lengths pro-duce shallower depth of field. However, if we zoom in to each image and take a look at some of the background detail, we’ll see that the amount of softness and defocusing Depth of Field Outside the Box by Richard F. Lyon
Depth of Field and Depth of Focus: Enter 3 figures in the column and click "calculate". Once you have done this, the depth of field calculator can then be used to enhance those carefully planned landscape, macro, and low-light images where the range of sharpness is critical. For a more in-depth background on this topic, please see: "Understanding Depth of Field"
How to use the DoF Table. This depth of field chart is the fastest way to have your DoF calculations done. Also, it comes in very handy to visualize how depth of field changes with aperture and subject distance for the selected camera and focal length. charts. On the line corresponding to normal (6/6; 20/20 in the United States) vision, a On the line corresponding to normal (6/6; 20/20 in the United States) vision, a letter subtends 5 minutes of arc.
A Flexible Depth of Field Calculator Cambridge in Colour. Depth of Field Definition. Depth of field refers to the section of a photograph that appears to be in sharp focus. John Shaw's Nature Photography Field Guide, John Shaw, 2000 . The depth of field is defined as the area in front of and behind the subject that is in acceptable focus. Night and Low-Light Photography Workshop, Alan Hess, 2011, Depth of field is bounded by two distance measures: near and far, where near is the closest distance (to the camera) that subjects appear to be sharp and far is the shortest distance beyond which subjects look out-of-focus (or longest distance within which subjects appear to be in-focus)..
Depth of Field Calculator PhotoBert
Depth of field (DoF) Table PhotoPills. Once you have done this, the depth of field calculator can then be used to enhance those carefully planned landscape, macro, and low-light images where the range of sharpness is critical. For a more in-depth background on this topic, please see: "Understanding Depth of Field", field as possible. Lateral Depth and Spacing A relationship exists between depth and spacing of drains. For soils of uniform permeability, the deeper the drains, the wider the spacing (within limits). Higher permeability soils can have greater spacing Need to provide adequate root depth above the saturated zone. S d. Lateral Depth and Spacing A relationship exists between depth and spacing of.
Depth of Field Scale Photo.net Photography Forums
Depth of Field Vol. 1 Nautiljon. For many cameras, depth of field (DOF) is the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image.The depth of field can be calculated based on focal length, distance to subject, the acceptable circle of confusion size, and aperture.A particular depth of field may be chosen for technical or artistic purposes. An Introduction to Depth of Field Page 6 The relevant distances are shown in . Figure 4: the image distances . v. n. and . v. f. are the positions of the standard when focused on the near and far objects, respectively; they correspond to.
Depth of Field and Depth of Focus: Enter 3 figures in the column and click "calculate". In this article we’ll focus on understanding a Depth Chart. Depth charts is one of those which can let you know about Demand and Supply. It gives a visualization of demand or supply of a particular stock or commodity or a cryptocurrency. Today, we’ll try to understand why these depth charts are needed and how to read them.
field as possible. Lateral Depth and Spacing A relationship exists between depth and spacing of drains. For soils of uniform permeability, the deeper the drains, the wider the spacing (within limits). Higher permeability soils can have greater spacing Need to provide adequate root depth above the saturated zone. S d. Lateral Depth and Spacing A relationship exists between depth and spacing of charts. On the line corresponding to normal (6/6; 20/20 in the United States) vision, a On the line corresponding to normal (6/6; 20/20 in the United States) vision, a letter subtends 5 minutes of arc.
Once you have done this, the depth of field calculator can then be used to enhance those carefully planned landscape, macro, and low-light images where the range of sharpness is critical. For a more in-depth background on this topic, please see: "Understanding Depth of Field" field as possible. Lateral Depth and Spacing A relationship exists between depth and spacing of drains. For soils of uniform permeability, the deeper the drains, the wider the spacing (within limits). Higher permeability soils can have greater spacing Need to provide adequate root depth above the saturated zone. S d. Lateral Depth and Spacing A relationship exists between depth and spacing of
depth of field in the right-hand image than in the left-hand image. Traditionally, we would say that the right-hand image has less depth of field because it was shot with a longer focal length, and longer focal lengths pro-duce shallower depth of field. However, if we zoom in to each image and take a look at some of the background detail, we’ll see that the amount of softness and defocusing Download page for Linhof brochures, manuals, informations. Linhof Price List. Linhof Price List 2018/19, English and German Linhof Price List, excel format Linhof Price List, PDF format Lenses, Price List, PDF format, April 2019. Delivery Terms
An Introduction to Depth of Field Page 6 The relevant distances are shown in . Figure 4: the image distances . v. n. and . v. f. are the positions of the standard when focused on the near and far objects, respectively; they correspond to Depth of Focus vs Depth of Field (DOF) – To clear up any confusion, these terms mean the same thing. They can be used interchangeably with focus range and DOF. They can be used interchangeably with focus range and DOF.
29/02/2012В В· This video explains what depth of field is, how it works, and how to control it. While some concepts are simplified a good deal, it should help you get a good understanding of depth of field. I Depth of Field Chart. Large Format Camera tools. Calculate depth of field and bellows extension compensation. Select format: 4x5 8x10. Beta v0.10 - 19. jan. 2017 - added 8x10 inches; Developed by: AndrГ© Eide - Instagram - Facebook
charts. On the line corresponding to normal (6/6; 20/20 in the United States) vision, a On the line corresponding to normal (6/6; 20/20 in the United States) vision, a letter subtends 5 minutes of arc. field as possible. Lateral Depth and Spacing A relationship exists between depth and spacing of drains. For soils of uniform permeability, the deeper the drains, the wider the spacing (within limits). Higher permeability soils can have greater spacing Need to provide adequate root depth above the saturated zone. S d. Lateral Depth and Spacing A relationship exists between depth and spacing of
They maximize DOF (depth of field), the region of acceptable sharpness, by focusing at the hyperfocal distance. A simple function of lens focal length, aperture and the diameter of the Circle of Confusion. The wider the angle of a lens, the shorter its focal length and deeper depth of field. So, as an example, an 18mm lens will have deeper Bokeh simulator and depth of field calculator. This application interactively calculates the camera depth of field and background blur and visually simulates it on a photo together with different types of lens blur (bokeh) for any lens, camera and distance combination. Activating the help mode shows descriptions of the interface elements.
Depth of field is determined by aperture, lens focal length, and the distance to the subject: Aperture: Wider apertures (lower f-numbers) reduce depth of field, smaller apertures (higher f-numbers) increase depth of field. Lens focal length: Longer focal lengths reduce depth of field, shorter focal lengths increase depth of field. Photography Neutral Density (ND) Reference Chart Bare Meter Reading = 1/8000 1/4000 1/2000 1/1000 1/500 1/250 1/125 1/60 1/30 1/15 1/8 1/4 1/2 1s 2s 4s 8s 15s 30s ND2 (1) 1/4000 1/2000 1/1000 1/500 1/250 1/125 1/60 1/30 1/15 1/8 1/4 1/2 1s 2s 4s 8s 15s 30s 1m
depth of field (in object space) is the same. • Might be counter intuitive. • Very useful for macro where DoF is critical. You can change your working distance without affecting depth of field • Now what happens to the background blur far far away? Depth-of-Field Calculator * ** To find the near, far and hyperfocal distance for a specific lens, enter the focal length (mm), aperture (f/number) and the object distance (whole or decimal number). The JavaScript program will calculate the near, far, depth and hyperfocal distances. The unit of measure for distances is feet. This can be
09/01/2017 · Volume de manga : Depth of Field Vol. 1, Date de sortie : 07/05/2018. J'ai pris l'habitude d'aller sur le toit du vieux bâtiment de l'école après les cours, … 06/06/2006 · The charts above show a graphical representation of DoF at different distances. Chart 1: Shows how mush DoF that you will get using a 50mm lens. That is total area coverage that will be in focus. Y-axis shows the depth of field, of depth of focus. X-axis shows how far the subject is away. Different lines indicate different f-numbers
