The Scanning section is BELOW
A few attempts to clarify some mysteries about the basics of flash and digital photography, hopefully helpful. More detail about fundamentals, how it works for those interested (good to know when you're ready).
Pixels, Printing dpi, Video dpi - What's With That? First Basic Fundamentals
Image Resize - Cropping, Resampling, Scaling Basics to use digital photos
White Balance Correction Click on White things
Why Should I Shoot Raw? It's the easy way to get quality
Depth of Field and Hyperfocal with calculator, and a better way to blur the background
Field of View of Lens and sensor, with calculator
Crop Factor and Equivalent Focal Length, and the WHY of the Magnification illusion
f/stops and shutter speeds Understanding the numbers, and a few lens properties
What are JPG losses? JPG Artifacts
RGB color What is Digital Color?
How Light Meters Work Maybe not as assumed
Details about Metering Principles Including TTL flash
A Histogram is Not a Light Meter Incident vs. Reflected meters
18% Gray Card What's the Idea?
Do I need a handheld light meter? Sekonic L308S
Surprises in the Use of Histograms Use only the camera's three RGB histograms
Histograms are Gamma Encoded The numbers may not be what you think
What and Why is Gamma? with calculator for histogram values
Introduction Basics about light and flash
Inverse Square Law Flash falls off with distance
Maximum Sync Speed The shutter limits it, Not the flash
Flash pictures are Double Exposures - Learn to use it
Flash Outdoors - Fill Flash in Sunlight
Flash Indoors - Factors affecting TTL exposure
Auto ISO - but for flash?
Rear Curtain Sync - for Blur from Ambient Motion Trails
Matching White Balance of Room Lights - Colored Filters on Flash
Nikon TTL BL with D-Lens Distance Lens distance accuracy is poor
Lighting Kits for Home Setups Flash is good for Portraits
Copying slides with a camera - calculator for macro lens or extension tube
Photo Editor Curve Tool (Curve tool compared with Levels)
Diffraction Limited Pixels? Really?
Memory Card Speed How much do we need?
Camera Exif Data Need a good Exif viewer?
Math tips of EV and precise camera numbers - f/stop, shutter, ISO
This scanning material is about the basics of scanning. It may be older material, but the basics are all still very valid. The purpose here is to offer some scanning tips and to explain the basics for scanning photos and documents. It is also about the fundamentals of digital images, about the basics to help you get the most from your images from your scanner and camera. How it works, for those who want to know.
Included here are the general questions that we've all asked about digital images. The material is about the basics, certainly not superficial, but it is not at all difficult either, it is just simply about how it works. It describes in plain language the things we need to know to efficiently get the most from our images, in the various ways that we can use them. Do realize that digital camera photos are already digitized (scanned, so to speak, meaning, first preference is to use your original camera file if you have it).
Many newbies want to scan a photo at the greatest possible resolution. We'll explain why that's the wrong answer, with tips about how to choose a more appropriate answer to match the actual job. That and many other scanning basics are covered here, and it's intended to be a fast jump start to aid newcomers to graphics and scanning. There will be a little technique to learn, but when you've seen it once, then it's rather simple.
Video Resolution - How much to scan?
Say No to 72 dpi - It's a false notion
Printing Resolution - Scaling and Resampling
The Scaling Menu - Scaling Output Size
Printing Guidelines - Printing dpi
Printer Resolution - How much to scan?
Line art and Threshold - Copy, OCR, Text
Descreen to remove Moiré Interference
Images in printed media
Photo Resolution - How much can we scan?
Image File Formats - Which format?
Transparent Media Adapter - 35 mm slides?
Dynamic Range - 12 or 16 bits?
Convert Bytes between KB, MB, GB, TB
Calculate Diffraction - In support of Depth of Field
Depth of Field and Hyperfocal - And a better way to blur the background
Percentage of Fill Flash of TTL Flash Compensation with Lighting Ratio calculation
Nominal & actual Precise Goal Charts of f/stop, shutter and ISO values
Copying slides with a camera - math for macro lens or extension tube - Image size, magnification, resolution
Chart of "The Numbers" for many sensors & film sizes - And more about Depth of Field
Please report any problem with the calculators, or with any aspect of any page content. Reporting of problems will be very much appreciated, thank you.
I do try to help with questions about the basics or about my material, but I cannot help with the "what hardware to buy" or "my hardware doesn't work" questions, so those two types of email will necessarily get no response.
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