Home
>
Personal Technology
>
Is Digital Camera Technology Making Film Obsolete?

Is Digital Camera Technology Making Film Obsolete?

Perhaps not yet, but the handwriting might be on the wall?

How is a digital camera different from a film camera? What are pixels and why are they important? What's the difference between optical and digital zoom? What advantages do digital cameras have compared to film cameras? Let's address these and other questions as we discuss digital camera technology.

First a short history and overview of digital imaging?

The technology began with television in the early 1950's when researchers discovered how to convert video images to electrical signals for storage on magnetic tape. In the 1970's electronic still photo cameras were developed. These employed the first generations of solid-state image sensors. By the late 1980's megapixel sensors were introduced - the technology that paved the way to today's modern digital cameras.

Fundamentally, film and digital cameras do the same thing. Both utilize camera lenses to focus photographic images on a light sensitive medium where they are stored for later retrieval. But the way each camera does this is radically different.

Instead of capturing the image on film that must be developed and printed, digital cameras measure light and color characteristics using photodiodes built into a sensor - either a Charged Coupled Device (CCD) or Complementary Metal-Oxide Semiconductor (CMOS). An Analog-to-Digital Converter (ADC) then converts the signal to binary, or digital, code. This code is sent to a Digital Signal Processor (DSP) which adjusts photographic elements such as contrast and color, and compresses the file for storage in the camera's memory, compact flash card, or other memory device.

Digital cameras have huge advantages when it comes to viewing and printing photos. It's nearly instantaneous! We can immediately look at the picture on the camera's LED screen, and if we don't like it, delete it and shoot again. Or we download and view it on our computer's monitor. And the pictures can be cropped or enhanced in minutes on the computer with photo software and printed with a photo printer. Plus many digital cameras have optional printer docks that don't require a computer at all.

What's a Pixel?

The human eye perceives a nearly infinite blending of light and color which high-quality film can approximate in a photograph. A digital image however, is a binary code file that records these variations as elements called pixels - short for picture elements.

Pixels are tiny squares of light and color, that when assembled create a mosaic. And like a mosaic, if the squares are small enough we see a smooth, photographic image. However, if the pixels are too big the transitions appear jagged or out of focus.

More pixels equal higher resolution and photos with clearer sharper detail, much like when you look at a mosaic with very small elements. For example, a 3 Megapixel digital camera can produce pretty good snapshots and even enlargements to about 8" X 10". But the more you enlarge, crop or otherwise manipulate the image, the larger the pixels become, degrading the photo's quality.

Does size matter?

The number of pixels the sensor produces is important, but so is the quality. The CCD sensors of many small digital cameras are about the size of a small fingernail, while some larger models will feature sensors up to about 1" across. There are conflicting opinions about sensor type and size, and the technology is advancing. But in general it can be argued that the photodiodes in a tiny CCD probably won't be as powerful or effective as an equal number in a larger sensor.

So unless your most important considerations are the smallest and/or cheapest camera, you're likely to be happier with the picture quality from a slightly larger model, assuming both have the same number of pixels.

All Zooms are not equal

The specs say the camera has 3X optical and 4X digital for a 12X total zoom. Sounds good, right? The answer is yes and no. Optical zoom works like a telescope, while digital zoom crops the picture. Using these zoom specs with our 3 megapixel camera example, here's what happens.

Optical zoom brings the image 3X closer and uses all 3 million pixels. But digital zoom crops up to 75% of what the lens sees and the sensor is exposed to, so the photo now has about 750,000 pixels. Depending on lighting and other conditions, using full digital zoom may not even get you a good 4" X 6" print.

The Future of Digital Photography

The last few years have seen tremendous advancement in digital imaging technology. Some high-end digital cameras can now generate more than 12 million pixels and produce photos that rival medium-format film cameras. As with all electronic technology, it's reasonable to expect even better cameras will come to the market over the next several years.

Photography "purists" will probably resist abandoning their film cameras as long as possible. But when comparing convenience, flexibility and quality, it seems inevitable that the majority of photographers will opt for digital over film photography ? and probably sooner rather than later.

For more information on comparing features and finding the best digital camera to fit your photography style and budget, see digital camera comparisons.

Digital cameras information from A to Z: camera types & features, how they work, accessories, photo printers, comparisons and more - plus digital photo processing tips and info at digital camera comparisons, Your Complete A-Z Resource for Digital Cameras, Accessories and Information.

Batchtown Chicago prom limo .. Lockport Chicago limo O’Hare

In The News:

A virtual private network can help ensure your information remains security and your privacy remains intact. Kurt the CyberGuy explains.

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents now and for the future.

Artificial intelligence-based cameras are giving air defense operators unprecedented capabilities in monitoring and protecting airspace.

Apple's iOS 18.1 Inactivity Reboot automatically reboots your iPhone if it hasn't been used or unlocked for more than three days, providing better data protection.

An inventor designed rooftop solar panels for a Tesla that draws solar energy while the car is parked, adding travel mileage without plugging in.

There are currently no laws governing what artificial intelligence can and cannot do with the information it gathers; here are 10 things to avoid telling AI chatbots to keep yourself safe.

A credit union with over 240,000 members recently revealed it was targeted by cybercriminals, resulting in a data breach that was part of a two-month attack by hackers.

Scammers have become skilled at creating convincing fake websites that can easily fool unsuspecting users. The CyberGuy offers tips to protect yourself.

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents now and for the future.

CAPTCHAs, which are used by websites to confirm whether users are people or bots, are harmless, but hackers are using them to infect PCs with malware.

Hackers recently leaked personal information of about 500,000 Americans and stole patient medical records that included lab results and insurance details.

The holiday season sees a rise in mobile shopping scams. Tech expert Kurt “CyberGuy" Knutsson helps you learn how to stay safe.

Tech expert Kurt “CyberGuy" Knutsson says a VPN enhances online banking security by encrypting data and protecting privacy.

Beware of these six sneaky holiday scams. Tech expert Kurt “CyberGuy" Knutsson gives you tips to avoid falling victim.

Tech expert Kurt “CyberGuy" Knutsson reveals how to securely back up and factory reset your Android to protect your privacy and data.

Artificial intelligence is making life easier for cybercriminals, allowing them to create elaborate scams to trick people. Kurt the Cyberguy explains how to protect yourself.

Cut through all the digital clutter and delete multiple emails from your Android simultaneously. Kurt the CyberGuy explains how it's done.

Tips to prevent your holiday decorations from being stolen

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents now and for the future.

Kurt "CyberGuy" Knutsson lays out the immediate steps you should take if your phone has been hacked and your personal information becomes vulnerable.

Fraudsters are sending people bogus invoices through PayPal as part of a sneaky scam that is going around; here's how to protect yourself from being fooled.

A former Colgate-Palmolive employee was shocked to discover $750,000 had been drained from her 401(k) account. "CyberGuy" offers tips on how to prevent identity theft.

Electric vehicle maker Harbinger recently showed its electric delivery truck can handle icy roads with agility and stability in winter.

To make the busiest time of year more manageable, here are some tricks for tracking your packages, taking quality family photos and curating the perfect Christmas playlist.

Kurt "CyberGuy" Knutsson explains how to keep your online Amazon gift purchases a secret from loved ones or friends this holiday season.

Is Digital Camera Technology Making Film Obsolete?

Personal Technology