A few scanning tips

by Wayne Fulton

The Scanning section is BELOW

Photography and Flash

A few attempts to clarify some mysteries about flash and digital photography basics, hopefully helpful. A little of it is Nikon-specific, however almost all subjects are general, not affected by brand at all.

Four Flash Fundamentals We Must Know

1. Inverse Square Law

2. Continuous light vs. Instantaneous flash - vs. Shutter Speed

3. What is Soft Light?

What Hot Shoe Flashes Do

4. Flash pictures are Double Exposures

Flash Outdoors - Fill Flash in Sunlight

Flash Indoors - Factors affecting TTL metering exposure

Rear Curtain Sync - for Blur from Ambient Motion Trails

Matching White Balance of Room Lights - Colored Filters on Flash

The Essential Fundamentals About Digital Images

Pixels, Printers, Video - What's With That?   Basic Fundamentals

Image Resize - Cropping, Resampling, Scaling   and Aspect Ratio

White Balance Correction   Click on White things

Why Should I Shoot Raw?   It's the easy way to go

What are JPG losses?   JPG Artifacts

Speedlights

A Beginners Guide to Select a Hot Shoe Flash     Part 2, chart

Comparing Power of Flashes with Guide Number Ratings

Nikon TTL BL with D-Lens Distance   Zoom lens distance accuracy is poor

Third Party Flash Brands Bypass D-Lens Distance Problems

Speedlight AA Batteries

Comparisons of Optical Slave Triggers   (for the SB-600 too)

Speed of Flash Units for High Speed Photography

Nikon TTL history - TTL, D-TTL, iTTL

Metering

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

Do I need a handheld light meter?   Including Sekonic L308S

There are TWO types of Histograms   The single histogram is Poor

Histograms are Gamma Encoded   The numbers are probably not what you think

Lighting

What Umbrellas Do

Mounting Speedlights in Umbrellas

Light Kits for Home Portrait Setups   It should be flash

Standard 45 Degree Portrait Lighting Setup

Nikon CLS Commander Wireless Remote Flash System (AWL)

Which is Softer, Reflected or Shoot-through Umbrellas?

The Main Trick is to Learn to Actually "See" the Lighting

Comparing Properties of Speedlights vs Studio Lights

Methods to Trigger Flashes

Miscellaneous

Scanning Thousands of old Slides with a digital camera

f/stops and shutter speeds   Understanding the numbers

EV - Exposure Value   and Chart, plus the Sunny 16 Rule

FX vs DX Lens Crop Factor

Have we hit a megapixel limit?

Rant about Diffraction Limited Pixels   Really?

Memory Card Speed   How much do we need?

Camera Exif Data   Need a good Exif viewer?

Good Books on Flash Photography

Photo Editor Curve Tool   (compared with Levels)

Solenoid Valve for Water Drop photography

Calculators

Compute Field of View of camera lens and sensor

Printing and Scanning DPI calculator

Percentage Fill of TTL Flash Compensation EV

Guide Number Calculator, including conversions

Power Difference of Two Flashes from Guide Numbers

EV Difference of any two f/stop values

EV difference of any Two Camera Exposures

EV difference of two Distances due to Inverse Square Law

Show Image Size and Data Size, for Various image formats

Determine Distance to an object in the image

Convert Units, Bytes, KB, MB, GB, TB

Maximum Image Dimensions from Megapixels

Scanning

This scanning section is older now, 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.

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.

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.

Never used a scanner before?

Evaluating Scanner Features

Scanning / Printing dpi Calculator

Scanning 101 - The Basics

The First Fundamental Concept

Video Resolution - How much to scan?

Say No to 72 dpi - It's a false notion

Images for television or for PowerPoint

Printing Resolution - Scaling and Resampling

Finding the Scaling and Resampling Menus

Printer Resolution - How much to scan?

Line art and Threshold - Copy and OCR, Text

Line art and Grayscale

Scanning for Fax

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?

What about Film Scanners?

A few Links to Other scanning sites

A few Frequently Asked Questions - FAQ

Scanning 201

A Simple Way to Get Better Scans

Histogram

UnSharp Mask sharpening

Curve Tool

Clone Tool

Restoration of Genealogical Photos

Correction of Faded Slides

A few Typical (discontinued)
Scanner Software
Acer Mirascan
HP PrecisionScan LT
HP PrecisionScan
HP PrecisionScan Pro
Microtek ScanWizard 5
Microtek ScanWizard Pro 6
Minolta Scan Dual II
Polaroid 4000
Umax VistaScan
Umax MagicScan
VueScan - Vuescan is still going strong!

Search Scantips.com
Google
Web scantips.com

Which Video Screen Resolutions Do Others Use?

Vote in a popularity survey of your video screen resolution settings   

Copyright © 1997-2015   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 scanner to buy" or "my scanner doesn't work" questions, so those email probably get no response.

Email: