Lawrence Letham, Alex Letham: GPS Made Easy Category_Telephoto Lenses bright maximum aperture means you

bright maximum aperture means you can shoot handheld in low-light conditions while still getting outstanding sharpness and clarity

but negatives will still produce good prints

4 maximum aperture produces outstanding evenly lit images with edge-to-edge sharpness—virtually no sagittal coma or light falloff

Articulated arm with centre lever to lock all 3 movements

Lawrence Letham, Alex Letham: GPS Made Easy Category_Telephoto Lenses bright maximum aperture means youGPS 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.