My Awesome Field Guide to Rocks and Minerals: Track and Identify Your Treasures (9781641525954) Replacement Lens multi-layer coating that reduces reflectance

multi-layer coating that reduces reflectance in the visible light spectrum

This fully revised edition of the best-selling North American bird field guide is the most up-to-date guide on the market

6″ (150 mm) and 12″ (300 mm)

0" focal path extension between 2

8° only minimal performance loss at edge of FOV Wavelength range: 400 - 700 nm Spot size: < 4

My Awesome Field Guide to Rocks and Minerals: Track and Identify Your Treasures (9781641525954) Replacement Lens multi-layer coating that reduces reflectanceBecome a rock hound with this field guide for kids ages 7 to 10 The world of rocks and minerals is massive, amazing, and full of cool new things to uncover! My Awesome Field Guide to Rocks and Minerals teaches you the skills you need to collect, identify, and catalog your own treasures. Explore 150 different rocks and minerals, and get step by step guidelines for testing and identifying the ones you encounter out in the field. Theres also plenty of