What is dslr: Definition and 12 Discussions

A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a solid-state image sensor and digitally records the images from the sensor.
The reflex design scheme is the primary difference between a DSLR and other digital cameras. In the reflex design, light travels through the lens and then to a mirror that alternates to send the image to either a prism, which shows the image in the optical viewfinder, or the image sensor when the shutter release button is pressed. The viewfinder of a DSLR presents an image that will not differ substantially from what is captured by the camera's sensor as it presents it as a direct optical view through the main camera lens, rather than showing an image through a separate secondary lens.
DSLRs largely replaced film-based SLRs during the 2000s. Major camera manufacturers began to transition their product lines away from DSLR cameras to mirrorless interchangeable-lens cameras (MILC) beginning in the 2010s.

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  1. sophiecentaur

    Stargazing Using DSLR movies for Astro Image stacking application

    I have used my entry-level Zwo colour camera to get movies of planets and, subject to my limited skills, those movies (Avi format) are handled quite happily by Autostakkert and Registax. I have used my DSLR successfully to take multiple long exposure images and they have stacked fine (of...
  2. Anand Sivaram

    I Is it possible to use a DSLR as a cost effective spectrometer?

    Is it possible to use a DSLR as a cost effective spectrometer? To find out: The wavelength of different monochrome LED lights. The color temperature of different white lights To elaborate, take a DSLR and keep the white balance to fixed 6500K to get D65 white point. Take the photograph of...
  3. mishima

    Stargazing 'losing light' 1.25" DSLR coupling vs 2"?

    I use a 2" coupling to mount my DSLR on the scope. However, I have an 90 degree mirror angle in the 1.25" size, and would like to use it sometimes for convenience getting my eye on the viewfinder/lcd screen. I was wondering what drawbacks, if any, there were in stepping down the diameter of...
  4. Q

    Stargazing What is the best way to reduce overexposure in DSLR astrophotos?

    Hi, I've been trying to take some deep sky images with my DSLR. However, my pictures tend to get washed out and overexposed after more than just a couple seconds. Is there something I can do to fix this, or is this just an issue with ambient city light? I'm already using a lens hood, and...
  5. 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.
  6. Greg Bernhardt

    Optical DIY Exoplanet Detector with a DSLR

    Great project to do! DIY Exoplanet Detector with a DSLR
  7. C

    Is a Webcam Better than a DSLR for Astrophotography?

    Hi, Recently started with astronomy with a basic 5 inch reflector, not motorised but interesting initial explorations. Subsequently became interested in trying to take pictures of the moon, saturn and then onto Jupiter. Found through utube that you can modify cheap webcams and in combination...
  8. DaveC426913

    Is a 5-year-old DSLR still worth it at a discount?

    I went to college for photography and still have my old Pentax K-1000. That was a large fraction of a century ago. Since then, I've been doing fine with my point & shoot (Canon 630) for years. But on recent vaykays, my picture-taking has exceeded my camera's abilities. I want to step up. But...
  9. jtbell

    Shopping for a Nikon DSLR? Better buy it soon

    The current flooding in Thailand has shut down Nikon's factory that makes most of their consumer-level DSLR bodies and lenses. The water has been at least 2 meters deep for the past few weeks, and apparently shows no signs of receding yet. See the before-and-after pictures in the following...
  10. I

    Find the Perfect Nikon DSLR for Hobbyists | Under $1000 Budget

    Hi there, Back in the day (10 years ago) I used to be really good at photography, however the hobby died out since I was in high school, my film budget was slim to none. Here we are ten years later, and I'm thinking of getting another camera: A DSLR. I like Nikon, so I want to stick with...
  11. S

    What is a decent entry level DSLR?

    enough said