Steiner 12x40 Predator vs. Pentax PCF WP 12x40
In a Steiner vs Pentax shootout, it will depend entirely on which models you are comparing. Both companies make everything from inexpensive models to top-of-the-line glasses.
The best Pentax roof prism models (made in Japan versions) are optically as good as the best Steiner roof prisms. Comparing the porro prisms from both companies is a little tougher since Steiner doesn't make a center-focus porro.
The Steiner indivdual eyepiece focus (their auto-focus) works like any other IF focusing system. When properly adjusted, everything from 30-40 yards to infinity is always in focus. This is a great feature for medium to long range observing and it is also makes for a very rugged, easy to seal binocular, hence the popularity for military applications.
For applications, however, where is observing is often done at less than forty yards, the IF system is very slow and clumsy to use. You will have to focus both eyepieces simultaneously at these distances to use your binoculars at all. This is a disaster for a lot of birding or for other close in applications such as bowhunting.
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