TRBenjeski wrote:
Greetings...
My sincere interest in photography includes both the artistic and technical aspects. After undergraduate studies at the Rochester Institute of Technology, I spent nearly 15 years as a Research Laboratory Technician at the Eastman Kodak Research Laboratories on multiple interesting and exciting projects during the 70's and 80's.
Enough about me – now for my digital photography questions that I hope you can help with.
While I continue to have a strong interest in photography, unfortunately, my knowledge and expertise is associated with “analog” photography – silver halide, wet chemistry photography – and not with digital photography technology. However, I would very much like to better understand the digital photography technology, especially regarding digital image quality – how it is achieved, what factors affect it.
Although I have conducted some personal research into better understanding digital image quality, the texts that I have reviewed have not contained the answers or detail that I seek. For one example of what I mean by “digital image quality”, I have viewed multiple digital image files of the same subject, with each digital image file consisting of increasing quality – sharpness, resolution, color rendition, etc. I would very much like to understand how this is achieved.
I understand that the digital camera’s imaging sensor size significantly contributes to the digital image quality, as well as megapixel quantity of the camera. But, I believe that there are additional factors that affect digital image quality, including megabyte size of the digital image file itself.
If you might be able to recommend one or more texts that could answer these and other questions I have regarding digital image quality, how it is achived, and what factors affect it, I would sincerely appreciate it.
Additionally, I would like to try to “connect the dots” between analog and digital photography, wherever possible. Basically, I would like to identify the technical aspects in digital photography that have a corresponding technical aspect in analog photography.
Please accept my sincere appreciation for your time in reading this message, and for any assistance you can provide. Thank you very much!
Greetings... br br My sincere interest in photogr... (
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Good morning! Sorry to be getting into your discussion so late, but I have redirected my "interactive" energy around photography toward investing in young people (both students and teachers) at the local STEAM high school where I am a substitute teacher for 90-100 days per year. I now only visit here once or twice a week for a few minutes.
As background, I'm a retired educator (physics and mathematics) and engineer who has been doing photographic documentation (from snapshots to job-related work) for close to 60 years. After returning from a trip to Germany and Austria in 1990 and being disappointed with my trip photos, I began enrolling in photography classes at my local college to learn more about the history, art, and science of photography. I switched completely to digital (which I now prefer to call silicon-based) photography in 2006. Apart from a few rolls of film shot several years ago for a couple of projects at work, I have not used film since making that switch.
You have already received several replies above. Those from Mr. Burkholder and Mr. Shapiro are particularly valuable and helpful in answering your questions. I'd just add a couple of comments to expand a bit on what they have said and maybe provide a bit wider context field.
First...there is really zero significant fundamental difference between silver-based photography and silicon-based photography. Both of them simply involve capturing a well-focused image on a sensing medium, then controlling exposure so that the proper number of photons interact with the medium to create a properly exposed "image." In fact, the only difference of any importance is that many (or even most) photographers today consider sensor sensitivity an exposure "variable." There are two key pieces of this difference. The first is that, with the exception of sheet film cameras, once a roll of film was loaded, the photographer was committed to a given film speed until that roll of film was used. (Of course, processing decisions could be made about individual exposures when sheet film was used.) The second is that silicon-based cameras, especially the newer ones, offer a dizzying range of ISO-equivalent exposure indices. (The first digital camera I used only offered a range from ISO 100-ISO 400, as I recall. My most current camera goes all the way to ISO 64,000) Exposure indices that most photographers could only dream about are now routinely available to almost everyone.
Second...the technology around capture, processing, and printing of silicon-based images is incredibly advanced and complex. And that complexity involves numerous disciplines.
As a "hardware" person myself, I can understand and appreciate your desire to "understand it all." I wish you well as you move in that direction. My suggestion, though, is that an immersive approach may or may not be ideal, given the point to which photographic systems have been developed already. And if you decide that it is, you are going to need to build a very robust respiratory support system to prevent drowning. You might want to consider instead an incremental approach...focusing primarily on one area at a time.
You will find the group here to be very much centered around shooting. You will also find them to be very much geared around post-processing every image. I do not support starting out that way, especially if you want to learn how the pieces of the systems work together to capture images. My suggestion is not to begin with raw images, either. Fine/Large JPEG or TIFF images will be much more helpful in seeing how the various parts of the camera system work together to capture your images, because you will be able to view unambiguously the results of the various choices you make at exposure. In fact, using JPEG will require you to target your exposure choices carefully, because there will be less room for error. The narrow latitude will actually help you see the effects of suboptimal choices or missed exposure combinations.
There are some differences in how you will want to meter. Film allowed the option of protecting highlights in order to capture shadow detail by choosing alternative development processes. Digital images have no headroom at all, just like digital audio on a CD. You cannot recover highlights once they are lost. But much shadow detail can be recovered if images are captured with sufficient bit depth. Post processing allows that (along with a lot of other wizardry), but I'd absolutely not worry about that at the start. Plenty of time for it later.
Photography is very much a lab class. Reading can be helpful, but putting what you learn into practice is a requirement. Understanding effects on either side of "ideal" is fundamental to being able to create the best results. Systems are so good today that "almost correct" can appear deceptively on-target.
So best wishes on your journey. Your background and history tell me that you will do fine and probably become one of the strongest experts here. Take a deep breath. Focus on the facts. Avoid "lore" and institutionalized misconception and error. Mostly...have fun and remember that you eat an elephant one bite at a time.