Questions tagged [camera-design]

Pertaining to the physical and functional design of camera bodies.

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37
votes
3answers
3k views

Why don't they make all DSLRs with an electronic shutter?

Why don't they make all DSLRs with an electronic shutter? Is it technically possible? Surely this would allow easier syncing with flashes (rather than the usual 1/200s or 1/250s max). I could even ...
31
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8answers
4k views

What is the difference between in-lens image stabilizing and sensor-based image stabilizing?

And which one is more effective?
30
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7answers
9k views

Why is there “single” in the term DSLR (Digital Single Lens Reflex)?

I have been reading about lenses and I was curious to know why there is a term "single" in the abbreviation DSLR? As far as I have read, the modern DSLRs (for example, the Nikon 3200) come equipped ...
21
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3answers
4k views

Why is there a mechanical shutter in a digital camera?

I understand that in a camera the diameter of shutter opening — the aperture — controls how much light comes in, and this affects the resulting exposure. But I don't understand why, in a digital ...
20
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3answers
21k views

What makes a camera 'weather sealed'?

What is the structural and mechanical differences between a weather sealed body and a non weather sealed body? Is weather sealing still effective if the lens isn't weather sealed?
19
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1answer
3k views

Why do even high-end cameras often still include normal (non-cross-type) AF sensors?

Modern cameras often use two kinds of AF sensor: normal, and cross-type. While normal-type AF sensors notably struggle focusing on high-contrast vertical lines, cross-type sensors, though more ...
19
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3answers
2k views

Why don't cameras have autofocus points in the edges and corners?

On all the DSLRs I've used, there are never any autofocus points near the edges and corners. Why is that?
18
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3answers
1k views

Why is there not a protective glass element that is between the lens and shutter in a SLR?

With the danger of dust on all SLR cameras, it only seems logical that adding a simple glass element that went between the lens and shutter (mounted on the camera) would both protect the camera's ...
18
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4answers
24k views

What are shutter actuations?

I was just reading the question How many actuations are "too many actuations"? and trying to figure out what a shutter "actuation" actually is. The only thing I can guess is that it's the number of ...
17
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3answers
6k views

How are the red focus point indicators displayed on a DSLR's focusing screen?

The question Why do the focus points leds in my viewfinder appear shadowed? raises another question for me. How are these indicator lights implemented in typical DSLRs? Are they actually small LEDs ...
16
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5answers
4k views

Why can't my custom camera body focus to far distances?

I have built a custom optical device that uses a standard C-mount lens as found on CCTV cameras. Wikipedia states that the flange-to-film distance of a C-mount lens is 17.526 millimetres. I have ...
14
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1answer
2k views

What does the pentaprism/pentamirror do?

In an SLR, the light bouncing off the mirror goes through a pentamirror or pentaprism before being reflected to the viewfinder. However, it seems to me that it would be possible to project an image to ...
14
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2answers
7k views

What is the difference in purpose between a focal plane shutter and a leaf shutter on a camera?

I inherited my Grandfather's beautiful Graflex Crown Graphic which he used for his entire career as a portrait photographer. (It's the picture on my avatar if you want to see it.) Doing research on ...
12
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6answers
719 views

Does the convergence of video and photo technology in digital cameras have a negative impact on strictly photographic ability?

With every new Canon and Nikon camera we are witnessing the progression of an unprecedented convergence of video and photography ability, something completely unthinkable during the film era. But I ...
10
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3answers
3k views

How do SLR lenses connect to the body?

I recently bought my first SLR camera and lens for it and I have questions about how they interact. My lens attaches on, and I can use the focus on the lens itself, but if I use the auto-focus, does ...
10
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3answers
8k views

What are the consequences of making camera bodies black?

Considering that silver and other camera colors are outsiders, I wonder if there is a specific reason to make black camera bodies. I can think of several "marketing" reasons (discretion, first, or ...
10
votes
1answer
2k views

What is a magnesium alloy shell?

I have a Canon DSLR with a magnesium alloy shell. What does this mean, what are the other metals that make it an alloy, and why was magnesium used and not aluminium and steel?
9
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12answers
2k views

Is there a DSLR/mirorless camera with minimal options like a classic, simple SLR?

I have an Olympus OM-D E-M5. The number of options, multiple ways of doing the same thing, video recording, playback, etc. are making me crazy. What is the closest thing, available today, to my (long ...
9
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5answers
4k views

Why don't people care any more about shutter speed accuracy?

With most old (film) cameras people were concerned about shutter speed accuracy at all speeds even if it was an electronic shutter. Nowadays, people seem not to be concerned with this when buying ...
9
votes
4answers
939 views

Why the need for SLR in digital cameras?

Excuse my ignorance but as far as I know, SLR was invented in order to get the photographer to see (through the viewfinder) exactly what image will fall on to the film. In digital cameras the image ...
9
votes
6answers
1k views

Why is the main sensor not used instead of the separate AF sensor to focus a DSLR?

From this answer I understand that the reflex mirror of a DSLR is actually not reflecting all the light, but it passes a certain amount on to the AF sensor. So if the reflex mirror can pass light, ...
8
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7answers
2k views

Why has no one invented a 4:5 aspect ratio APS-C/35mm-sized DSLR? [closed]

People keep inventing different form factors and formats for cameras, but none seems to have hit on what seems (to me) like an obvious one. Why doesn't somebody build a camera with a sensor that has a ...
8
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5answers
3k views

Why not have the diaphragm in camera body instead of the lens?

Why is the diaphragm to control the amount of light entering the camera typically in the lens and not the camera body itself?
8
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6answers
4k views

Why do DSLR cameras still use monochrome LCD as their top displays?

It's 2015 now. Why do DSLR cameras still use monochrome LCD as their top displays? A raster graphics display screen would be more useful and could display more different information.
8
votes
7answers
1k views

Why is there no full-frame but low res sensor?

So I just watched a review on the Sony NEX-7, which is 24MP in APS-C size.... I am a Canon user and I immediately think about the announced Canon Powershot G1X with almost APS-C sensor but at a lower ...
8
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5answers
891 views

Is it technologically possible for a sensor to run two ISO's at once?

This question (Why don't digital cameras have better dynamic ranges?) combined with a typical sunset photo got me thinking... Exposure differences between sky and ground in a sunset shot are ...
8
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3answers
3k views

Will a pinhole camera work with instant film?

I am making a pinhole camera for a school science fair. Is it possible to use Instax Mini Film instead of the long process of developing photo paper? If so, would I use the same design, and just swap ...
8
votes
1answer
3k views

Where is the AF sensor located in a DSLR?

As I understand every DSLR has a separate, smaller sensor that handles phase detection focusing. Where is it located? If this location is different for every DSLR, and therefore this broad question ...
8
votes
3answers
1k views

Why is the neck strap of an SLR attached to the top plate of the body?

Why is it that the neck strap of an SLR is attached to the top of the body? In my opinion it would be better if the neck strap would be attached to the bottom of the camera body. This would have the ...
8
votes
2answers
758 views

What characteristics make a digital sensor good?

Generally, the technical image quality of a digital image (before we get to the post-processing stage) is the product of the characteristics of the lens and the recording medium, with an important ...
7
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4answers
619 views

Can we improve phone cameras using separate sensors for each of RGB?

So I was reading all about the multi camera system on the new Huawei P20 Pro which really got me thinking about how we can use multiple cameras to improve image quality, especially in such a compact ...
7
votes
1answer
1k views

Why is the IR filter present when there is already the Bayer filter on an image sensor?

I have been trying to remove the Bayer filter from the CCD image sensor of my camera. Now I see there's an IR filter before the lens, however I don't understand the point of it because isn't the Bayer ...
6
votes
2answers
488 views

Why are rangefinders not directly above the lens?

It seems the biggest gripe about rangefinders (vs SLRs) is that your shots are not quite what you see, there is a parallax error due to not seeing through the lens. Which makes me think, if you put ...
5
votes
5answers
813 views

Why do cameras use a slit between two curtains rather than exposing the entire sensor instantly?

Why is it more effective to use "a slit travelling from top to bottom of the sensor" in faster shutter speeds, rather than exposing the entire sensor instantly? And the slit thing only comes in fast ...
5
votes
3answers
2k views

What's the difference between vertical and horizontal shutters?

I've always thought that shutters were composed of two vertical curtains that moved along the sensor in order to expose it (at least for most DSLRs). Recently I've bought a Pentax K1000 that ...
5
votes
3answers
280 views

Inconsistency in camera shutter

I was watching this slow motion video of a camera shutter and the scene at time 2:49 puzzled me. All of the mirrors flipped up in sync except for the one in the bottom left shot of the 1/2000s which ...
5
votes
1answer
199 views

Where can I find viewfinder adaptions for the Fujifilm HS series?

For model series S/HS, in particular HS25, HS30, ... That Fujifilm's viewfinder seems designed (misdesigned) only for persons with very wide set eyes (or with very non-prominent noses and nose ...
4
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6answers
1k views

Have cropped digital sensors reached their peak design limits?

APS-C and smaller sensors seem to have plateaued off in terms of their megapixel counts, possibly due to diffraction limits. The ISO performance of these sensors has not increased substantially in the ...
4
votes
7answers
9k views

What is the benefit of a vari-angle LCD monitor on a camera? [duplicate]

Nikon D5100 (which I am thinking to buy) has a vari-angle LCD monitor. What benefit does it add? Can you take your own self-portrait snaps like this? Is it practical or is it a non-cashable worth-...
4
votes
4answers
268 views

How small can current SLRs get and still give comparable photo quality?

Let's take the full-frame Canon 5D as example. How small can this camera be and still give comparable picture quality? What are the design constraints? Besides the sensor, the body, can the lenses ...
4
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5answers
595 views

Do all cameras with autofocus need motors?

Do all autofocus cameras need motors to drive the lens? I would have thought today's modern electronics rendered motors obsolete.
4
votes
3answers
508 views

In-body neutral density (ND) filters?

Neutral density filters are apparently widely used across multiple fields e.g. for shallow depth of field in bright light portraiture, long exposure landscapes, and maintaining shutter angle in video/...
4
votes
4answers
618 views

What are the physical limits that determine a camera's flash sync speed?

We know that Flash Synchronization Time represents the shortest time we can use with active flash in order to avoid the formation of a black stripe in our photos. So, it is very good if it is quite ...
4
votes
2answers
3k views

How many times is the image inverted inside a DSLR camera?

How many times is the image flipped (inverted) inside a standard Digital Single Lens Reflex camera?
4
votes
2answers
630 views

What is the maximum aperture consistent with the Nikon F-mount?

In a related thread, it's been debated whether there is a hard limitation to maximum possible lens aperture; it seems there is none. However, using the example of the nikon F mount, this technical ...
4
votes
2answers
3k views

Why are there no full-frame lenses with leaf shutters?

I see that many medium format lenses are made with leaf shutters, which allow much faster flash syncing speeds, so why doesn't anyone put them in FF lenses?
3
votes
6answers
4k 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 ...
3
votes
4answers
730 views

Why do you need a viewfinder in MILC?

What are the main reasons for choosing a mirrorless camera with a viewfinder?
2
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3answers
399 views

Are there any DSLRs that are only manual mode?

I am just wondering if there are any DSLR camera models that are implemented with hyper simplicity, where you are given only full manual control, and dials for those parameters only? I think this ...
2
votes
2answers
238 views

How does a camera meter light when the shutter is closed?

I have read when we check the image from viewfinder, we can set the aperture, shutter speed and ISO based on the light coming through the shutter. But, only when we click the shutter release is the ...