Monday, October 25, 2010
What if I wear eyeglasses while using my binoculars?
Most models of binoculars will allow you to view in comfort while wearing eyeglasses or sunglasses. These binoculars have been designed to provide you with longer eye relief. Eye relief refers to the distance images are projected from the ocular lens to their focal point and can vary from 10mm to 23mm. If you want to use your binoculars with eyeglasses or sunglasses, look for binoculars that offer at least 15mm of eye relief.
Note: Without proper eye relief, the eyeglass wearer will not see the full field of view.
When using your binoculars, be sure you understand the correct use of the eyecups. Most models have adjustable mechanical eyecups that either twist or slide up and down on the eyepiece of the binocular (older and sometimes less expensive models have a rubber piece that folds down).
If you're an eyeglass wearer using binoculars, be sure you have the binocular eyecup placed in the down position while using your binoculars. Your glasses will provide the distance needed from the ocular lens, and this will allow you to see the widest possible field of view through your binoculars. Conversely, if you don't wear glasses, you'll enjoy your binoculars more if you leave these eyecups fully extended (placed in the up position). This will allow the binocular eyecups to just comfortably touch your face and provide the necessary distance between your eye and the lens.
To see our short video which illustrates fit and focus of the binocular, click on this link: Understanding Binoculars: Fit and Focus.