Tools
Interactive calculators and tools to help with telescope selection and astronomy planning.
View Simulator
See what planets, nebulae, and galaxies actually look like through any telescope. Compare views, not just specs.
Performance Calculator
Complete optical analysis: resolution, limiting magnitude, eyepiece coverage, target difficulty, and side-by-side telescope comparison.
Eyepiece Calculator
Calculate magnification, true field of view, and exit pupil for any telescope and eyepiece combination.
Telescope Finder Quiz
Answer a few questions about your experience, budget, and goals and get personalized telescope recommendations.