Focal ratio calculator

Focal Ratio Calculator Calculate the focal ratio of your telescope. Formula: Focal Length / Aperture Focal Length: mm mm f/

Solve My Task
Figure out math question
Solve math questions
Clear up math question
Improve your theoretical performance

Telescope Calculator: How Does Your Telescope Perform?

A 200-mm (8-inch) telescope with a 2,000-mm focal length has a focal ratio of f/10. By contrast a 200-mm astrograph (a telescope designed for astrophotography) that has a

  • 642 Teachers
  • 85% Recurring customers
  • 30868+ Student Reviews
Determine mathematic tasks

Solve math questions

Stay in the Loop 24/7

Get Homework

Enhance your theoretical performance

Determine math tasks

Focal Ratio Calculator

The formula is quite simple. The formula for the focal ratio is: Focal length in mm / Aperture diameter in mm This, normally, gives us a very neat number to use for the focal ratio.

Astronomy field of view calculator

The ratio calculator performs three types of operations and shows the steps to solve: Simplify ratios or create an equivalent ratio when one side of the ratio is empty. Solve ratios for the one

Figure out mathematic problems

Solving math problems can be a fun and rewarding experience.

Enhance your academic performance

I love figuring out mathematic problems!

Decide mathematic equation

Keep up with the latest news and information by subscribing to our RSS feed.