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 for those interested, more about how the details actually work (which is good to know when you're ready).
Pixels, Printing dpi, Video dpi - What's With That? First Basic Fundamentals
Image Resize - Cropping, Resampling, Scaling What we need to know to use digital photos
White Balance Correction Click on White things
Why Should I Shoot Raw? It's the easy way to get quality
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?
EV - Exposure Value and EV Chart
Do I need a handheld light meter? Sekonic L308S
Surprises in the Use of Histograms Avoid the camera single gray histogram
Histograms are Gamma Encoded The numbers may not be what you think
What and Why is Gamma? (with calculator).
Introduction Basics about light and flash
Inverse Square Law Flash falls off with distance
Flash pictures are Double Exposures - Important
Flash Outdoors - Fill Flash in Sunlight
Flash Indoors - Factors affecting TTL metering exposure
Auto ISO - 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
Depth of Field Plus a better way to blur the background
Field of View Of Lens and sensor
Crop Factor also Equivalent Focal Length, and the WHY of the Magnification illusion
f/stops and shutter speeds Understanding the numbers, and a few lens properties
Charts of Nominal and Precise numerical values f/stops, shutter speeds and ISO
Math tips of EV and precise camera numbers - f/stop, shutter, ISO
Diffraction Limited Pixels? Really?
Memory Card Speed How much do we need?
Camera Exif Data Need a good Exif viewer?
Photo Editor Curve Tool (compared with Levels)
Depth of Field and Hyperfocal - And a better way to blur the background
Chart of "The Numbers" for many sensors & film sizes - More about Depth of Field
Nominal & Precise Actual Goal values of each f/stop, shutter and ISO
Copying slides with camera - macro lens or extension tube math - Image size, magnification, resolution
Percentage Fill Flash of TTL Flash Compensation and Lighting Ratio calculation
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?
Please report any problem with the calculators, or with any aspect of any page. 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 email types probably necessarily get no response.
Copyright © 1997-2022 by Wayne Fulton - All rights are reserved.