What is Digital camera: Definition and 30 Discussions

A digital camera is a camera that captures photographs in digital memory. Most cameras produced today are digital, largely replacing those that capture images on photographic film. While there are still dedicated digital cameras, many more cameras are now incorporated into mobile devices like smartphones, which can, among many other purposes, use their cameras to initiate live video-telephony and directly edit and upload images to others. High-end, high-definition dedicated cameras are still commonly used by professionals and those who desire to take higher-quality photographs.
Digital and digital movie cameras share an optical system, typically using a lens with a variable diaphragm to focus light onto an image pickup device. The diaphragm and shutter admit the correct amount of light to the image, just as with film but the image pickup device is electronic rather than chemical. However, unlike film cameras, digital cameras can display images on a screen immediately after being recorded, and store and delete images from memory. Many digital cameras can also record moving videos with sound. Some digital cameras can crop and stitch pictures and perform other elementary image editing.

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  1. F

    Sensor "pixels" count vs digital image output pixels count

    Hello, I did some reading and wanted to check with you to make sure I have the correct information: in general, a digital camera is rated with so many Mega pixels which indicate the number of pixels of the largest image (mm x mm) that the camera can produce. The camera sensor (CCD or CMOS) has...
  2. brainpushups

    Measuring Reflectance with a Digital Camera

    Background: This fall our initial plan will have high school students on campus 1 day per week and working remotely for the remainder of the week. I'm trying to plan for some at-home labs and projects. I came across http://albedodreams.info/how_to/how-to-calculate-albedo-yourself/ site which...
  3. stevendaryl

    Lenses and Pinholes: What Does "In Focus" Mean? - Comments

    stevendaryl submitted a new PF Insights post Lenses and Pinholes: What Does "In Focus" Mean? Continue reading the Original PF Insights Post.
  4. Andy Resnick

    Insights New High Performance Ultra-wide Angle Lenses - Comments

    Andy Resnick submitted a new PF Insights post New High Performance Ultra-wide Angle Lenses Continue reading the Original PF Insights Post.
  5. Andy Resnick

    Insights Digital Camera Buyer's Guide: Tripods - Comments

    Andy Resnick submitted a new PF Insights post Digital Camera Buyer's Guide: Tripods Continue reading the Original PF Insights Post.
  6. Andy Resnick

    Insights Digital Camera Buyer's Guide: DSLR - Comments

    Andy Resnick submitted a new PF Insights post Digital Camera Buyer's Guide: DSLR Continue reading the Original PF Insights Post.
  7. Andy Resnick

    Insights Digital Camera Buyer's Guide: Real Cameras - Comments

    Andy Resnick submitted a new PF Insights post Digital Camera Buyer's Guide: Real Cameras Continue reading the Original PF Insights Post.
  8. Andy Resnick

    Insights Digital Camera Buyer's Guide: Compact Point and Shoot - Comments

    Andy Resnick submitted a new PF Insights post Digital Camera Buyer's Guide: Compact Point and Shoot Continue reading the Original PF Insights Post.
  9. R

    Digital camera flash question

    I've noticed that when somebody takes a photo of me with a modern digital camera, I experience not one flash but two. Are there really two flashes for some reason or is it a perception thing?
  10. fluidistic

    Bonsai shaper program, .raw from digital camera

    Hi people, I would like to create a sophisticated program that takes care of a bonsai. For simplicity let's assume that the bonsai is put into a cubic box with white walls, a digital camera able to produce .raw files and is under a compact fluorescent lamp. I want to define what I'd call the...
  11. A

    Optics: Working out distance of an object from single digital camera using the captured image

    Hi, I'm working on a project to determine the distance a pedestrian is away from a single digital camera but having never done optics before I'm struggling to find the right equation to use. I'd really appreciate any help! The method I am trying to use assumes you know the height of the camera...
  12. zoobyshoe

    Which Digital Camera Sensor Size Should I Choose for Sharper Pictures?

    I'm confused about this. I'm looking at two point and shoot cameras. One is 10MP and has a sensor of 1/1.7. The other is 12MP and has a sensor of 1/2.3. According to this wiki article: http://en.wikipedia.org/wiki/Image_sensor_format, the 1/1.7 sensor is physically larger than the...
  13. P

    What chemical solution to use for cleaning digital camera sensors?

    Since it is impossible to get certain cleaning solutions (in Canada, at least) like "Eclipse" (methanol) and pure isopropyl alcohol (from drug stores) is adulterated with some kind of greasy oils that leave smear marks behind, I would appreciate some help as to what chemical solutions might be...
  14. fluidistic

    Tips to buy a new digital camera?

    I've a digital camera since 2005 and it started going bad maybe 1 or 2 years ago. Basically most of the time when I want to take a photo it turns automatically in filming mod. I have to wait/shake the camera in order for it to turn back to photo mod and that's pretty annoying; even more...
  15. Pengwuino

    Digital Camera control software?

    So I'm taking a bunch of pics at regular intervals to show my class how this borax/glue slime slowly collapse and spread. This happens over the course of a few minutes and it gave me an idea. Is there any software out there that you could hook up your digital camera to and have the software take...
  16. Andy Resnick

    Insights Digital Camera Buyer's Guide Introduction - Comments

    Andy Resnick submitted a new PF Insights post Digital Camera Buyer's Guide Introduction Continue reading the Original PF Insights Post.
  17. M

    Is the Olympus Stylus Tough 8010 a good digital camera option?

    Hi, I'm after a digital camera. Doesn't have to be too special beyond a) a high resolution (12MP minimum) and b) reliable and likely to last a while. I'm looking into this - Olympus Stylus Tough 8010 14 Megapixel Digital Camera - Silver 5X Optical Zoom - 2.7 LCD Touch Display - Waterproof -...
  18. L

    Can my digital camera function at -20 degrees Celcius?

    After 5 loyal years, my Canon Digital IXUS 400 has given in... i can take pictures, but there are red stripes all over them. Maybe it is something fixable, but I've been meaning to replace the thing anyway. So, i put it in a plastic sealed bag in the freezer, which the thermometer indicates...
  19. Cyrus

    Find the Best Digital Camera Under $200.00

    I need to get a new digital camera that's under $200.00 and has good quality pictures and video. What do I look for in a good camera? I know its not the MegaPix because the camera I have now is 5.0MP but sucks. So, its got to do with the quality of the lense. Any ideas? Thanks!
  20. Saladsamurai

    Any advice on buying a new digital Camera?

    Hey yall. I live in north of Boston and I am headinf down to West Palm Beach Florida for a long overdue vacation with my girlfriend. I have a kodak easy share that is a little clunky since is a few years old. It is a 5 MP and it takes decent shots. I am looking for something slimmer that...
  21. wolram

    Digital Camera Software Compatibility with Windows Vista

    I have a digital camera but the software does not support windows vista, i have been to the cameras website but there is not a solution listed, am i sunk or is there a way around it? Thanks.
  22. P

    Why flash of light in a digital camera?

    When taking photos with a digital camera there is usually a burst of light before the photon is taken. Why is this? Is it because there is usually not enough light reflecting off the object being photographed. It is this reflected light that is what is being recorded on the film inside.
  23. Ivan Seeking

    Digital Camera Neutralizer

    http://www.gatech.edu/news-room/release.php?id=1017 [Broken] Also, regarding the recent conversations about text messaging and cheating on tests, there are cell phone neutralizers as well. They are or will soon be in theaters, restaurants, etc.
  24. V

    Need help W/ Digital Camera Design Project

    Hello, I am currently working on a Design Project for my Senior project, and the aim of this project is the development and construction of an interface between a CMOS camera and a computer. This interface allows a user to get images from the camera, to change some of the properties of the...
  25. J

    Fix My Fuji FinePix S7000 Camera Issues

    My Fuji FinePix S7000 is sometimes showing lines, or purple streaks on the LCD when I take a picture. These lines and streaks are also on the downloaded photo. Is this something that can be fixed, or do I need a new camera? :cry:
  26. N

    What is the best digital camera for normal use under $450?

    hello everyone ... i just need a guidance to the best digital camera for normal uses ( not profssional) .. is it sony ? please specify the model also my budget is around 450 any help will gr8ly b appreciated cheers :smile:
  27. D

    Stargazing Cost-effective digital camera and telescope

    Could anyone suggest good equipment for astrophotography? What is the most cost-effective digital camera and (digital camera compatible) telescope?
  28. russ_watters

    Digital Camera Battery Usage

    There's probably nothing anyone can do to help me, so this is mostly a *****, but I have a Nikon Coolpix 3100, which is a great camera except for the battery life. Now, I know most digital cameras have crappy battery life, but mine is rediculous. What makes me think something can be done about...
  29. A

    Digital Camera Problems

    Hey guys; I'm having an add problem with my digital camera. It's an Olympus C-50 Zoom. I plug it into my USB port, and it says "New Hardware Found", then it shows that it recognizes it as what it is, the digital camera, then it says it found a "USB Mass Storage Device". It shows no errors...
  30. Moni

    Digital Camera Shopping - Finding the Best Option Under $300

    Digital Camera ! I need to buy a digital camera. And I've budget 200-300 USD. Can you suggest any?