The Scanning section is BELOW
A few attempts to clarify some mysteries about the basics of flash and digital photography, hopefully helpful. A little of it is Nikon specific, however almost all subjects are general, not affected by brand.
Guide Numbers (with calculator)
How Light Meters Work (maybe not as assumed)
Details about Metering Principles (including TTL)
A Histogram is Not a Light Meter Incident meters vs. Reflected meters
18% Gray Card - What's the Idea?
EV - Exposure Value and Chart
Do I need a handheld light meter? Including Sekonic L308S
Surprises in the Use of Histograms Avoid the camera single gray histogram
Histograms are Gamma Encoded The numbers are probably not what you think
Review of Aperlite YH-700N Speedlight ($90) w/HSS and Commander Master
Review of Neewer NW-985N Speedlight ($63 - Not recommended)
Nikon TTL BL with D-Lens Distance Zoom lens distance accuracy is poor
Comparisons of Optical Slave Triggers (for the SB-600 too)
Lighting Kits for Home Setups Portraits should be flash
f/stops and shutter speeds Understanding the numbers
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)
|Calculate EV difference of:|
|Two camera Exposures||Two f/stop values f/stop math|
|Power of Two Flashes from Guide Numbers||Two Distances due to Inverse Square Law|
|Compute Field of View of camera lens and sensor||DPI calculator - Printing and Scanning resolution|
|Guide Number calculator||Nominal and Precise f/stops, Shutter speeds, and ISO|
|Convert Bytes, KB, MB, GB, TB||Calculate EV|
|Cropping for Printing||Calculate Gamma|
|Percentage Fill Flash for TTL Flash Compensation EV||Show Image Size and Data Size, for Various image formats|
|Determine Distance to an object in the image||Compute Maximum Image Size from Megapixels|
This scanning section is older now, but the site has since moved towards digital camera basics. But do realize that the scanning material is about the basics, and the basics of scanning have not changed, still very valid. The purpose is to offer some scanning tips and to explain the basics for photos and documents. It is 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 that want to know.
Included here are the general questions that we've all asked about digital images. The material is about the basics, and is appropriate for the beginner. The content is 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 be efficient and get the most from our images, in the various ways that we can use them.
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. 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.
The material was written about scanning, but most of it is a basic primer on digital images in general, applicable to images from digital cameras too, about which there is a quick summary here. This material is intended for home and hobby users, and is not concerned with commercial prepress.
Video Resolution - How much to scan?
Say No to 72 dpi - It's a false notion
Printing Resolution - Scaling and Resampling
Printer Resolution - How much to scan?
Line art and Threshold - Copy and OCR, Text
Descreen to remove Moiré Interference
Images in magazines/books/newspapers
Interpolated Resolution - 9600 dpi?
Photo Resolution - How much can we scan?
Image File Formats - Which format?
Transparent Media Adapter - 35 mm slides?
Copyright © 1997-2016 by Wayne Fulton - All rights are reserved.
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 get no response.