How does a digital camera work?
I am writing a series of articles on one of my websites..call it Digital 101. These articles are for digital newbies, considering the change from film to the digital world. Of course, before any of the articles hit the real world, I would like to submit them to my critical Nikonian friends for review. I have found that I can get away with NO inaccurate statements when you read my articles.
So, when you have time, please stop by this web page and read my article. If something seems inaccurate, please tell me. If something seems hard to read, or is unclear, please suggest changes.
I truly appreciate your input.
#2. "RE: How does a digital camera work?" | In response to Reply # 1archivue Registered since 26th Mar 2002Tue 29-Oct-02 05:57 AM
Great and useful 101..
I would have kept a phrase of caution in the "easy" picture deleting part... It is true that most beginners tend to erase the "bad" shot, but then, after some time, with film or digital, I am sometimes quite happy to find the "on the spot bad image" (if the choice of deleting was only framing, or with parts of apparent blurness)...
Today, I "force" myself to burn ALL the pictures of my CP 990, then only, choosing the ones to print or to display..
Maybe also a part on ISO simulation (and quality) that for a given megapixel size, along with the buffering, gives the "price tag"..
With my CP I sometimes feel like Atget, not being able to stop quick movements if the sun goes behind a cloud... But then that's what I like in photo today, the "creative" limitations.. :-):-)
But then, ones has to draw a line between a 101 and a 201..
#3. "RE: How does a digital camera work?" | In response to Reply # 1mrdinh Registered since 07th Aug 2002Tue 29-Oct-02 01:24 PM
mr.digi...nice article...easy to understand and not too technical...perhaps you can talk about the dust problems on dslr too...that is a issue people should know too...i think the more people know bout it the more complaints to the companies then perhaps in the future the companies might do something about it...
"stay on target"!!!...hahaha...just kidding....sorry
#4. "RE: How does a digital camera work?" | In response to Reply # 0
I don't think there will ever be gigapixel cameras or anything close, not even in studio large format backs.
There is a very real limit to practical optical resolution that is already being reached by small, high density CCD sensors. Once the resolving limit of your lens is reached, adding more pixels doesn't get you more image detail. There is also a practical limit to data handling and the actual end use of the image. You can enlarge a 35mm scan to the size of an office building and it will look fine at the intended viewing distance, so what is the application for a thousand-million pixel photograph?
Unless you can find a revolution in optics that will topple the limits of lens performance and optical physics, there will be a practical limit to pixel density. I'm sure refinements in noise, dynamic range, power consumption, etc. will be ongoing but Moore's Law will run its course very shortly in CCD development. Data storage should continue to increase in performance and decrease in cost, so cameras will need to be revised to keep up.
You don't mention the wide variety of camera capabilities and the degrees of usability. A basic P&S won't work for you if you want manual creative control. User interfaces range from difficult to intuitive. There are big differences between cameras with nearly identical specs, you should look at the camera as a camera before you buy. Does the lens have filter threads? Is there a remote or cable release, what does it cost? Where is the tripod mount located? Does the camera have a useful range of shutter speeds and apertures? Can you manually focus, how fast does the zoom respond? A thousand little things add up to a good camera or not - digital or not. What I'd suggest is pointing people to review sites like DPReview so they can research the details before buying.
Otherwise, the article is a nice overview and reads well.
#5. "RE: How does a digital camera work?" | In response to Reply # 4Tue 29-Oct-02 11:18 PM
Interesting thoughts BJ!
I often have wondered if they might just go the same route as they have with high-end digital video cameras, where they have a CCD for each color channel, although I don't see how that would increase the
effective size of the image.
If I understand the Foveon chip correctly (very little research), I think they are using a chip that has multiple layers, sort of like DVD technology compared to CD technology.
I agree that there is really little use for a huge terapixel file, unless you are trying to resolve some incredible detail. Why have more detail than the eye can resolve. But, then, why do we have Digital music technology that takes the music outside of the edges of human hearing? Some say they can experience a better musical interlude by enjoying the harmonics of the music outside the range of human hearing.
I think that as long as a market society exists, and we have money to spend, they will develop technology to acquire that money. Does it really matter that we do not need a gigapixel camera? Do we really, really, need a gigabyte speed computer? If the Operating System was kept in reasonable check instead of full Microsoft Bloat, we could do fine with a nice 486 computer. My DOS 16MHz 286 computer in 1986 ran about as fast as my 2.5GHz Pentium 4 computer does with Windows 2000. The screens are prettier, but the applications are actually slower. Bloat, bloat, bloat. The CPU's get faster, and the applications get bigger...an endless cycle. A gigapixel camera will be here someday, simply because the consumer thinks he needs one.
And, who says we will still be using lenses in 10 years?
#6. "RE: How does a digital camera work?" | In response to Reply # 5da1_2blame Registered since 19th Sep 2002Mon 11-Nov-02 09:45 PM
you're doing a wonderful job. it's because of nikonians like yourself that this site is so successful. just wanted to let you know that we appreciate you.
keep up the good work!