Listen to 300+ podcasts by best-selling authors, published Wednesday, 4pm EST!

Focal Reducer

Read this tip to make your life smarter, better, faster and wiser. LifeTips is the place to go when you need to know about Focal Reducers and other Telescopes topics.

What is a focal reducer?

Focal Reducer

A focal reducer reduces the telescope's focal ratio by a factor depending on the reducer itself. Simultaneously, the lens system helps to flatten the field, significantly improving edge-of-field corrections. For example, an f/6.3 focal reducer allows a reduction of photographic exposure times by about 50%, while producing an actual field diameter of 1.5" at the film plane.

   

Comments

Nobody has commented on this tip yet. Be the first.



Name:


URL: (optional)


Comment:


Not finding the advice and tips you need on this Telescopes Tip Site? Request a Tip Now!


Guru Spotlight
Linda Handiak