October 30, 2009, Newsletter Issue #50: Focal Reducers With Field Flatteners
Tip of the Week
Focal reducers work by shortening the focal length of a telescope to give you a wider field of view and speeding up the focal ratios – ideal for situations where you are photographing the night sky. Some focal reducers also come with field flatteners. With a basic focal reducer, stars at the edge of field may become blurry and out of focus. Field flatteners work to reduce the curvature in the field of view, improving the sharpness of images at the edges.
About LifeTips
Now one of the top on-line publishers in the world, LifeTips offers tips to millions of monthly visitors. Our mission mission is to make your life smarter, better, faster and wiser. Expert writers earn dough for what they know. And exclusive sponsors in each niche topic help us make-it-all happen.
| Guru Spotlight |
| Barbara Gibson |
