Lawrence Letham, Alex Letham: GPS Made Easy Brand_Manfrotto Nikon SLR cameras (without built-in

Nikon SLR cameras (without built-in adjustable eyepiece correction) have a base diopter value of minus one

It includes his best-known images of the 1950s and 60s

diatoms to vast geological formations

Having to change lenses as you shoot can slow you down and introduce unwanted changes in image quality

from seemingly criminal acts to simply grotesque acts

Lawrence Letham, Alex Letham: GPS Made Easy Brand_Manfrotto Nikon SLR cameras (without built-inGPS Made Easy tells you all you need to know about using handheld GPS receivers as a tool for accurate navigation in the outdoors. It explains how GPS works, describes the features of GPS receivers, and gives practical examples of how to use GPS receivers in a variety of outdoor situations.