I have several pairs of Pentax binoculars. I also got the monocular for grins and giggles. It works great for me.
My best pair is the ZD 10X43 ED I got from B&H on sale about 3 1/2 years ago. Awesome optics.
I also have the 8X25 A-Series AD WP compact binoculars. Very handy and fit in a shirt pocket.
I have the 4x20 VD WP 3-in-1 Binocular too. It can be broken down into two monoculars, or can be made into a 16x20 telescope. I got it for the novelty of the system, but it does what it says it should. When combined into a binocular, you can focus each eye separately.
Quick note. The average diameter of the pupil of the human eye is about 5mm. A 10x50 binocular has an image circle diameter of 5mm. I use it as a guide to choosing what binoculars I may want to get. That is the reason the 8x40, 10x50 and 7x35 binoculars are so popular. The same rule holds for spotting scopes. The other thing to look for is eye relief. A longer eye relief may allow you to wear glasses while viewing. That is important for some people.
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