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Topic: Hyperfocal distance

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	Hyperfocal distance - Wikipedia, the free encyclopedia
		Hyperfocal distance is a distance used in optics and particularly in photography.
		The first definition: the hyperfocal distance is the closest distance at which a lens can be focused while keeping objects at infinity acceptably sharp; that is, the focus distance with the maximum depth of field.
		The second definition: the hyperfocal distance is the distance beyond which all objects are acceptably sharp, for a lens focused at infinity.
	en.wikipedia.org /wiki/Hyperfocal_distance (2089 words)

	HYPERFOCAL DISTANCE.
		The hyperfocal distance of a lens is the distance from the optical center of the lens to the nearest point in acceptably sharp focus when the lens, at a given f/stop, is focused at infinity.
		Hyperfocal distance depends on the focal length of the lens, the f/stop being used, and the permissible circle of confusion.
		Hyperfocal distance is needed to use the maximum depth of field of a lens.
	www.tpub.com /photography1/ph20922.htm (1040 words)

	IR and Hyperfocal Distance
		In order to utilize Hyperfocal Distance focusing, the focus point on the focusing ring on the lens is aligned to the fstop being used rather than at the focus mark on the lens.
		Hyperfocal Distance focusing will allow me to shoot IR film at f8 and have the boulder 9 feet in front of me and be in focus, along with the waterfall in the background,also in focus.
		Hyperfocal Distance focusing is a wonderful tool that can maximize depth of field for a given fstop, especially the smaller fstops.
	home.insightbb.com /~keithz/hyperfocal.html (1086 words)

	Hyperfocal Distance Chart
		Hyperfocal distances for lenses with shorter or longer focal lengths are generally too extreme for the information to be very beneficial.
		Second, when the focus distance on the lens is set to the hyperfocal distance, all objects from one half that distance through infinity will be in acceptable focus.
		If the focus is set to less than the hyperfocal distance, the minimum distance for the depth-of-field range will decrease, or move closer to the lens, but the maximum limit for the depth-of-field range will also decrease, so distant objects near infinity would no longer appear in focus.
	www.tcinternet.net /users/nmolson/hyperfocaldistancechart.htm (1247 words)

	Depth of Field - - PopPhotoAugust 2001
		The hyperfocal distance is the zone of sharpness when your lens is set at infinity.
		The shorter the focal length of your lens and the smaller your lens aperture (f-number), the greater the hyperfocal distance.
		Hyperfocal distance can easily be determined for any lens or lens aperture if the lens has a depth-of-field scale.
	www.popphoto.com /howto/450/depth-of-field-page2.html?print_page=y (1171 words)

	Hyperfocal Distance
		Landscape photographs are often taken with the lens focused at the hyperfocal distance; near and distant objects are sharp in the photos.
		The hyperfocal distance is the point of focus where everything from half that distance to infinity falls within the depth of field.
		Focusing the lens on the hyperfocal distance for a particular f-number is easy: set the f-number index on one side of the depth of field scale under the infinity symbol on the distance scale.
	www.dofmaster.com /hyperfocal.html (2928 words)

	Understanding the Hyperfocal Distance
		The hyperfocal distance is particularly useful in landscape photography, and understanding it will help you maximize sharpness throughout your image by making the most of your the depth of field-- thereby producing a more detailed final print.
		The hyperfocal distance is defined as the focus distance which places the maximum allowable circle of confusion at infinity.
		The problem with the hyperfocal distance is that objects in the far background (treated as ~infinity) are on the extreme outer edge of the depth of field.
	www.cambridgeincolour.com /tutorials/hyperfocal-distance.htm (890 words)

	Hyperfocal Formula Page
		Hyperfocal depends on the size of the lens, f/stop and the size of your chosen circle of confusion (or at least as I understand it...
		Focusing at the hyperfocal distance maximizes the depth of field (from half the hyperfocal distance to infinity).
		Regarding the recent thread on calculating hyperfocal distabce and deploring the lack of DOF scales on Nikon zoom lenses, it is not necessary in practice to use fancy mathematical calculations to determine the hyperfocal distance.
	medfmt.8k.com /mf/hyperfocal.html (1568 words)

	Boo's Digital Photography Portfolio. Depth of field and hyperfocal distance. Tutorial no.11
		Hyperfocal distance is a point in space in front of you that is determined (and can be calculated) by the aperture and focal length of the lens you're using - and if you focus at that point, everything from half way between you and it and then to infinity will be in focus.
		Hyperfocal distance is also the point in front of you for the focal length and aperture combination where if you focused at infinity, the near point of acceptable focus would be.
		The basic principles of using hyperfocal distance to focus and determine available depth of field that you need to remember is that with wider angles/shorter focal lengths, the hyperfocal distance is closer to you and the longer the focal lengths and more zoomed, the further away the hyperfocal distance.
	www.zenadsl5251.zen.co.uk /photos/doftut.html (1926 words)

	Betterphoto.com Photography Q&A - What is Hyperfocal?
		Hyperfocal is the nearest distance at which infinity falls within the depth of focus.
		The formula for determining the hyperfocal distance is f^2/(F x d), where f^2 is the focal length squared, F is the aperture number, and d is the circle of confusion.
		Using trigonometry, average acuity, and viewing distance, calculate the maximum diameter of a dot that is on the verge of being discerned as such, and not a point (the acuity angle).
	www.betterphoto.com /forms/qnaDetail.asp?threadID=7062 (912 words)

	Flickr: Technique
		Before you say "the hyperfocal distance", consider that this distance is not the best compromise, it is the closest distance you can focus at while keeping objects at infinity acceptably sharp.
		If the hyperfocal distance was greater than 4 feet, you would need to consider using a smaller aperture, a shorter focal length or increasing the distance to the nearest object.
		Hyperfocal distances are calculated using a definition of what is "acceptably sharp" (the circle of confusion).
	www.flickr.com /groups/technique/discuss/72157594373560857 (771 words)

	Hyperfocal Distance
		The hyperfocal distance is the distance at which a lens should be focused so that everything from infinity to half that distance falls within the depth of field.
		An equivalent definition is that the hyperfocal distance is the shortest distance at which a lens can be focused and aslo have infinity within the depth of field.
		If you set the focus of your lens to the hyperfocal distance in the following table (distances given in meters), everything from infinity to 1/2 the hyperfocal distance will be in focus (where focus is based on a circle of confusion value of less than 25 microns - 0.025mm).
	www.bobatkins.com /photography/technical/doftable.html (261 words)

	DOF Table W/Definitions (Site not responding. Last check: 2007-10-09)
		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 near distance (sometimes called the near limit) is the point closest to the camera that is in acceptable focus and the far distance (or far limit) is the point farthest from the camera in acceptable focus.
		Hyperfocal distance is the nearest point to the camera in acceptable focus if the lens is focused at infinity (i.e, the near limit).
	www.fineart-photography.com /dof_plus.html (733 words)

	Hyperfocal Distance
		distance of a lens is the distance from the optical center
		The distance, as measured from the lens, to the
		The distance, as measured from the lens, to the farthest
	www.tpub.com /content/photography/14209/css/14209_39.htm (477 words)

	Digital Photography Zone (Site not responding. Last check: 2007-10-09)
		When a lens is focused on an object, there is some distance in front of the object and some behind which will also be acceptably sharp.
		When a lens is focused at the hyperfocal distance and everything in your photograph from some near distance (half of hyperfocal distance) to infinity will be sharp.
		To achieve the hyperfocal distance, set the lens to the widest zoom, set the Focus Model to manual and focus on the distance inside the (), such that the listed distance will be clear.
	www.geocities.com /digitalphotographyzone/dpzHyperfocal.htm (131 words)

	Question of the Month-Nov./Dec. (Site not responding. Last check: 2007-10-09)
		HYPERFOCAL DISTANCE is the point of focus where half that distance to infinity is sharp.
		It is the distance where you focus, that is, the point on the lens where footage or meters are indicated where, if that point is maintained, everything from half of that distance point to infinity will be in focus.
		If an hyperfocal distance happens to be 5 feet for a given lens, then half that distance, 2.5 feet, to infinity would be sharp.
	www.hoothollow.com /DefaultAnswrNovDec.html (926 words)

	Hyperfocal Hocus Pocus - Photo Tips @ Earthbound Light
		We know that the depth-of-field describes the distance range within the frame that is in relative focus, both in front of and behind the point we are actually focused on.
		The near-focus distance is then the closest point that appears to be in focus, and the far-focus distance is the far end of the DOF range.
		Instead, if we focus the lens such that the far-focus point is at infinity, the maximum range of distance is in focus and the lens is said to be focused on the hyperfocal distance.
	www.earthboundlight.com /phototips/hyperfocal-focusing.html (687 words)

	PhotoXplore.com - Hyperfocal Distance Chart
		Hyperfocal Distance varies depending on the focal length and the aperture that is selected.
		DOF varies depending on a number of factors, including lens to subject distance (the closer the subject the shallower the DOF), focal length (at the same aperture, the wider the lens the greater the DOF) and aperture (the smaller the aperture the greater the DOF).
		If instead you need the Hyperfocal Distance for a focal length or an aperture that is not included in the table, you may refer to John Hendry's excellent Hyperfocal Distance calculator which you can find at www.johnhendry.com.
	www.photoxplore.com /hyperfocal.htm (543 words)

	Photography Tip of the Month, Hyperfocal Distance - Wild Things Photography
		The distance at which anything that is between 1/2 that distance from the lense and on out to infinity will be in focus.
		This optimal distance is a calculation based on the focal length of the lense and the aperture used.
		Hyperfocal Distance - The distance at which anything that is between 1/2 that distance from the lense and on out to infinity will be in focus.
	www.wildthingsphoto.com /tips/tip9809.htm (434 words)

	Depth of field - Wikipedia, the free encyclopedia
		The hyperfocal distance is the nearest distance at which the far end of the depth of field stretches to infinity.
		Let s be the distance at which the camera is focused (the “subject distance”), f be the lens focal length, N be the lens f-number, and c be the circle of confusion for a given image format.
		At the hyperfocal distance, the terms in the denominator are equal, and the DOF is infinite.
	en.wikipedia.org /wiki/Depth_of_field (4182 words)

	HYPERFOCAL DISTANCE FOCUSING TECHNIQUE (Site not responding. Last check: 2007-10-09)
		The use of the Hyperfocal Distance of a lens is a most useful focusing method for the photographer to learn.
		The Hyperfocal Distance of a lens can be predetermined by mathematical methods, but, as those of us using Russian rangefinder cameras do not have access to the circle of confusion data for these lenses, it can?t be computed, and isn?t of much help.
		The Hyperfocal Distance setting of a lens may also be determined by using the Depth Of Field (DOF) Scale on the lens, an advantage users of modern 35mm cameras have pretty well lost.
	www.fortunecity.com /marina/marine/569/rusrngfdrs/focusing.html (1979 words)

	Hyperfocal distance in LF, i.e. for 90mm SA XL at f/22 - Large Format Photography Forum
		If the camera is focussed at the hyperfocal distance, the range of acceptable sharpness in subject distance (the depth of field) extends from one-half the hyperfocal distance to infinity.
		The "near" distance given in your tables is probably the nearest distance of acceptable sharpness and should be one-half the hyperfocal distance.
		H = ff/(cN) where H is the hyperfocal distance, f is the focal length of the lens, c is the circle of confusion diameter, and N is the f-number.
	www.largeformatphotography.info /forum/showthread.php?t=4020 (1060 words)

	Glossary
		Whether or not ghosting will actually occur when the picture is taken can be verified beforehand by looking through the viewfinder and using the camera's depth-of-field check function to close down the lens to the actual aperture to be used during exposure.
		Thus, by presetting the lens to the hyperfocal distance, the depth of field will extend from a distance equal to half the hyperfocal distance to infinity.
		The distance from the lens' rear principal point to the film plane when the lens is focused on a subject at a certain distance.
	www.usa.canon.com /html/eflenses/lens101/glossary/index_g.html (619 words)

	Depth of Field
		Thus, in the final print viewed from a distance of 10 inches, "any detail 1/100 inch in size or smaller will be acceptably sharp." This observation forms the basis for the calculation of most depth of field tables.
		For a 4 inch by 5 inch (4x5) print, the hyperfocal distance with a 35mm camera, and 43mm "normal" lens, is just short of 30 feet, making the near point of the depth of field just short of 15 feet.
		To regain the same hyperfocal distance and depth of field achieved with a 4x5 print, you must close down the aperture TWO stops.
	www.minoxlab.com /Don_Krehbiel/mpl/dkdof.htm (1380 words)

	Scot David Petitclerc - Freelance Cameraman - Venice Beach California (Site not responding. Last check: 2007-10-09)
		The 35mm hyperfocal charts that are available for downloading are both charts combined and were designed to be mounted back to back and laminated.
		Then reverse this process by aligning the lens' focus witness mark to the near focus distance (58') and make a mark above the lens' witness mark that aligns with the hyperfocal distance (114').
		Ex: Hyperfocal distance of a 1000mm at a T2.8 being greater than the distance where commercial airliners fly(46,000ft).
	home.comcast.net /~petitclerc/charts.htm (848 words)

	What is Hyperfocal Distance and Why Should I Care?
		Focus your lens at infinity and the leading edge of the area that is in focus is the hyperfocal point for that lens.
		Depending on the focal length of the lens and the closeness of the subject, setting your lens to its hyperfocal distance may leave that foreground subject soft.
		If you have a sufficiently bright viewfinder you can go to your hyperfocal distance and then gradually back the focus in until the foreground is tack sharp and that may require moving you point of focus back toward you until that foreground subject snaps into sharp focus.
	www.vividlight.com /articles/3513.htm (738 words)

	Hyperfocal distance shooters -- reconsider your ways! - Digital Photography News, Reviews & Forum (Site not responding. Last check: 2007-10-09)
		DOF is proportional to the SQUARE of subject distance (at all distances except for those close to hyperfocal and beyond, and to extreme close-ups).
		Now when it comes to using the CoC for “hyperfocal focusing” as in f2/Ac (where f2 is the focal length squared, A is the F-number, and c is the CoC) we are talking a different subject than trying to “balance” the DoF correctly (as in a portrait).
		Normally when hyperfocal focusing, we want to be as sharp as possible since there were be some loss of sharpness from the lens and the sensor (pixel and/or AA filter).
	www.dphoto.us /forum/showthread.php?t=192 (3103 words)

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