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Questions tagged [depth-of-field]

Depth of Field is the depth of a scene that is "in focus" as perceived by the eye.

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How can I protect scanner glass for scanography while preserving depth of field and avoiding artifacts?

I have recently gotten into scanography, but I have not yet found a good method to protect the scanner glass from objects that will scratch or soil it. I need to find a material that is optically ...
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11answers
4k views

How to have a sharp product image?

I am trying to get my images sharp, but I always notice there are some blurry edges that are further from the lens. I basically set my ISO to 100 and tried to work my way from there. Since I was ...
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1answer
53 views

Long-end softness in a wide-angle lens

I just got a copy of the Tamron AF 20-40mm F2.7-3.5 SP Aspherical IF for my Sony a7 (using the non-AF Sony A/E adapter) over eBay. I'm seeing what seems to me like a surprising degree of softness ...
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3answers
120 views

Is it beneficial to use full frame for blurred background?

I have often heard it said that to have a blurred background, it is beneficial to shoot full frame. However, is this really true? The useful largest aperture is anyway limited by the amount of depth ...
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2answers
85 views

How to achieve photo with no blurred background [duplicate]

When zooming I want to keep background not blurred. Is this even possible? I will have multiple cameras pointing at one object from different distances can I get a flat picture on all of the cammeras ...
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4answers
123 views

Does amount of background blur change with focal length given equal framing?

Let's assume I have two lenses, 50mm f/1.8 and 85mm f/1.8. I want to fill the frame with the photographed object. Now, if the object is 50cm wide, I need to take the photograph at a distance of 1.112 ...
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4answers
2k views

Is camera lens focus an exact point or a range?

I have often wondered if the focus of a lens at a particular focal length is an exact point or a range within a few millimeters. This becomes all the more important when manually focussing. How far ...
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3answers
440 views

What is “focus distance lower/upper” and how is it different from depth of field?

I have taken two photographs on a Canon crop sensor camera: 18mm f/9 with the following exiftool output (the focus was approximately at 3.5 meters): Focus Distance Upper : 5.27 m Focus ...
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3answers
144 views

How to make pictures lots of kids so everyone's face isn't blurry?

I have a Nikon D850 with portrait lens AF 105mm f/1.4. I'm just learning how to make good pictures. We purchased this camera not for business — we have kids and want to make every possible memory. I'm ...
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3answers
78 views

Take a telephoto portrait without background blur?

Is it possible to take a portrait of someone with a telephoto lens (for example 85 or 135mm) without any background blur (or at least with minimal blur)? I am planning to take portraits of somebody ...
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1answer
67 views

Why can't I see changed depth of field on LCD preview on my 2000D after changing aperture?

I have a Canon EOS 2000D camera with Canon EF 50mm f/1.8 lens that can achieve shallow depth of field. If I adjust the aperture settings of the lens on the camera, I'm not seeing any change of depth ...
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3answers
249 views

Which modern lens can achieve this kind of depth of field?

Im interested in knowing why the depth of field(mostly the background blur)in the Old image is very different from the depth of field in the New image? More then DoF the blur in the Old image is ...
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2answers
127 views

Does a telephoto lens with extension tubes or a dedicated macro lens provide more depth of field?

When doing macro photography, is there greater depth of field with a macro lens or a telephoto lens using an adapter?
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3answers
206 views

How do I choose a prime lens to get blurred backgrounds for full-body street photography shots?

I like to shoot street photography, say with the subject far enough away in the image that I can capture the full body, and still get focal blur in the background. My kit lens gives a decent effect of ...
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2answers
119 views

Does shift based perspective correction have any effect on focus?

Consider a photographer with an SLR camera and a PC lens attached in its default, unshifted position, standing on the ground at the base of a columned building whose height is X times that of the ...
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2answers
57 views

“Focal Distance” / “Depth of field” of endocsopic and (car) backup cameras

In a nutshell, my question is: Why is the depth of field for endoscopic cameras so limited? It seems it is generally around 3 to 8cm (some are around 3 to 40cm). Why aren't they similar to automobile ...
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1answer
133 views

How do I activate Depth of Field Preview on a Canon Eos 100?

I have searched the internet for some time now, and have found multiple mentions of a "depth of field preview" function on the Canon EOS 100 (the analog one from 1991. I have used a Canon EOS 100 for ...
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1answer
61 views

Why is far depth of field larger than near?

I just read this article which sounds quite sane. However, the article states (and backs it up with the diagram below) that the size of the smallest object that will be clearly resolved in your image ...
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2answers
197 views

Changing depth of field of Nikon D5200

I've been trying to change the depth of field on a Nikon D5200 for 2 hours and I can't seem to get it to work. I have to take photos and videos of people tomorrow (this is not my camera). The depth of ...
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3answers
174 views

Shallow depth of field with wide angle

I need to video (but same q for photos) an interview using a Sony A7 and the kit 28-70mm f3.5 - f5.6. I want the shallowest depth of field I can get. If I use 70mm the lowest aperture I can use is f5....
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4answers
189 views

Are all prime lenses designed so that the same DoF scale applies at any focusing distance? If so, why?

This question is about the mapping between the angular position of the focusing ring and the focusing distance. This mapping could be anything but the design of prime lenses seems to be such that a ...
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3answers
758 views

Any truth that depth of field extends from one-third in front of focal point to two-thirds behind it?

In the book Digital Photography Complete Course, there is a page that discusses and illustrates depth of field: There is an info box that says the following: The point at which you focus the lens ...
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2answers
2k views

What do these curved, color-coded lines mean on a vintage Nikkor lens?

This lens, a Nikkor 80-200 AIS, has some curved lines that are color coded to match the aperture ring. Originally I thought this was for focusing but playing around with it does not make it seem like ...
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5answers
1k views

How to maximize the blurred background look with a distant subject (for example, 10m away)?

What lenses do I need in order to achieve the amount of bokeh that's on the image below? I am quite new to dslr photography, and I want to buy a new lens. My main objective is to get strong bokeh ...
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5answers
3k views

How is it possible to have shallow depth of field in very bright conditions?

When setting the aperture at f1.8 you are for sure going to overexpose the image. When I'm out at the beach I set my GH5 at f1.8 with the shutter speed 1/8000 and my iso at 200, but I still get an ...
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1answer
172 views

How does blur radius change with distance from the point of focus at macro distances?

In a macro situation, is there a known function that maps the blur radius as a function of the physical distance from the plane of focus? I'd expect this function to give near zero (in pixels) at ...
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2answers
494 views

Does changing the focal length change the depth of field for the same magnification?

When taking pictures with lenses with the same f-stop and different focal lengths, and magnifying the same subject to the same size (by changing the distance), how does the depth of field vary? I am ...
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1answer
1k views

700D live view depth of field not accurate

I shoot with a Canon 700D and I've just bought myself a Sigma 105mm 2.8 Macro lens. I've been loving the new lens but one issue I have is that the depth of field in the live view on the camera's ...
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3answers
205 views

How can I achieve more depth of field on macro shots with a smartphone camera?

How can I get more depth of field for macro photography with a smartphone (Huawei Honor 8) camera? I am trying to do some macro photography work using my smart phone and a custom-made macro lens. My ...
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1answer
420 views

Is this “tack sharp with blurred background” look done with Photoshop?

I’m relatively new to photography and although I feel like each photographer has their own style when capturing an image it seems that sometimes I just don’t have the right equipment. The pictures ...
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4answers
223 views

Does a macro lens have a smaller DOF in 'real-world' distances at the same focal length and aperture as other primes, why?

This question IS about: Does a macro lens have a shallower DOF at the same settings and focal length as another prime? If so, what in the optics is responsible for this? Using a Macro lens as a ...
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2answers
275 views

Focal length measurement and definition in DSLR cameras [duplicate]

So i am a bit confused when it comes to focal length in DSLR cameras. According to multiple sources online i found and as per NIKON "It is a calculation of an optical distance from the point where ...
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2answers
175 views

How to take a macro photo, but with the subject completely in focus [duplicate]

I love macro photography, it gives an insight in the small world around is. Unfortunately, I'm really not good at it. When I came across an artificial beehive, I took a chance to get into the bees and ...
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2answers
114 views

Distortion towards the edges/corners of the field of view in an image

I am taking a picture keeping the camera horizontally in landscape mode from a height of roughly 3-4 ft, acquiring the top-view of the scene. It was seen that the objects placed towards the centre of ...
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4answers
208 views

How many steps to walk forward to get equal range to 200mm with 70mm lens?

I'm newbie in the world of lenses ... I have 24-70mm 2.8. I never got a chance to use 70-200mm. One friend told me that you just have to walk two or three steps forward to get 200mm equal range with ...
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1answer
572 views

Will 50mm f1.4 and 85mm f1.8 lenses produce the same bokeh, given the same framing?

I have recently upgraded from a DX Body (Nikon D3300) to a FX body (Nikon D750) and also I have Sigma 70-200mm f2.8 & Sigma 150-600mm Sport lenses. While I was using the DX body, I had a Nikon ...
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1answer
64 views

Depth of field and aperture size [duplicate]

Why does a smaller aperture size have a high depth of field? What is the physics behind this?
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3answers
6k views

How can a smartphone take pictures of a landscape with everything in focus?

After the announcement of the new Samsung Galaxy S9 with the new camera that changes aperture, I caught myself wondering: if smartphones have such a wide aperture (f/2.8, f/2.2, etc), how are ...
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4answers
3k views

How to convey a sense of depth & distance in a landscape?

I've noticed that some photos of landscapes make me feel the depth and immersion, don't know how to describe it, just the true feeling that the photo isn't really flat. Other photos rather look ...
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2answers
743 views

How can I find cameras with a Depth of Field Preview button?

Which specific cameras (Brand/Model) have a DOF button that actuates the iris and is NOT just an electronic function? I used the DOF and split screen focus extensively shooting 35MM. I don't have ...
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3answers
1k views

Understanding focus distance of Nikon f/1.8D lens with D5600 Camera

I took some sample photos using my Nikon D5600 camera with Nikon f/1.8D lens. I had to set the focus manually since this lens doesn't provide AF with my camera. My Question: The album of my sample ...
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4answers
239 views

Which aperture value determines depth of field on variable aperture lenses?

Do variable aperture values represent the way in which depth of field is rendered by a lens or only to the transmission of light (i.e the brightness)? For example, if i wish to calculate depth of ...
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2answers
221 views

depth of field and f-stop

I have a thorlabs DCC1545M camera. https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=4024&pn=DCC1545M e.g. it has a 1/2 inch format, a sensor size of 6.66mm*5.32mm, with 1280*1024 ...
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1answer
206 views

Why does my depth of field look like it’s swirling?

I’m sure this is an illusion. Maybe it’s just me, but to my eyes the out of focus areas look as if they’re swirling or distorted, like if you took the photo with a fisheye lens or something like that. ...
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4answers
2k views

What is the formula for determining where infinity focus begins?

I'm having difficulty find any info on determining where infinity focus begins. I'm assuming there's a formula involving focal length and... Can anyone help?
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2answers
590 views

How do I calculate the change in HFOV and VFOV as Object Distance changes?

Let's assume that I have the following camera parameters confirmed: Focal Length F/# Coc And a Lens Focusing Distance (the focus distance it was optimized to in the manufacturing process of the lens)....
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1answer
294 views

What is the depth of field if the the focus distance is set to infinity?

If the camera format is 35mm, the focal length of the lens is 35mm, the aperture is f/4, the subject distance is 25ft, and the hyperfocal distance is 39'7", then what would be the range of focus when ...
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6answers
3k views

Why do we need a DOF preview button?

Why not just show the effective depth of field, by default? What's the point of having it display a picture that's different to how the image will actually turn out? My first thought was, it must be ...
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2answers
128 views

What variables define DoF? [duplicate]

I want to be able to see a frame and 'calculate' (either mathematically or intuitively) the DoF of the picture to be taken. The most basic variable would be the aperture; my question is do other ...
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6answers
533 views

Lens equivalent depth of field [duplicate]

This question is ported directly from Physics SE, because the guys there believe this is the right place for it. In digital photography, there's the principle of lens equivalency, according to which, ...