I had a local store bring in some different Pentax to try. All are made in China and it was very hard to pick a favorite of the bunch.
The DCF NV 10x36 and 8x36 seem robust and reasonably clear. For $150 they are an excellent value and I have seen far worse glass for a lot more money. There was no obvious flaw in the view but hey lacked the brightness and crisp edge to edge view of the higher end stuff. If they fit the budget check them out for sure. They are far better than what I have been using for years. I compared them to the Monarchs and they are as good as the in stock M5s but not as nice as the M7s to my eye.
The DCF LV 9x28 were very interesting. Again, not spectacular, but very nice in a compact package. Much easier to handle than a true pocket and optical clarity ahead of the NVs. I would say as clear as the M7s but not nearly as bright or as wide a FOV. This to be expected in a 28mm but for less than $200 they would be so handy to have in the pocket and light enough to carry at all times. The 9x is a nice idea to split the 8x or 10x decision. I think I may end up with a pair of these just to take fishing and hiking.
My favorite so far is the now discontinued Pentax DCF SP 8x43. These are old stock made in Japan and they are unquestionably of higher quality than the others. They are old news considering all the latest and greatest but to my eye they are crystal clear edge to edge and very bright. Some sites suggest they use ED glass and multi coating equal to the very best made. The FOV is a little narrow but it is truly useable. Most boast a wide field but are so fuzzy at the edges it is a moot point. The reviews were very good in their hay day but like I mentioned they are old news. They are of course fog and water proof.
Here is a blurb for a review site;
Pentax DCF SP Binoculars
The DCF SP series of binoculars includes the very popular award-winning 10x50 DCF SP. They combine exceptional image quality with edge-edge sharpness and come with a long list of outstanding features including an inner-focus optical design incorporating hybrid aspherical eyepiece lenses, high-resolution phase-coated roof prisms, hydrophobic coating on exposed objective and eyepiece lenses, and multi-coated optical elements. Coupled with a magnesium-alloy body with JIS Class 6 waterproof construction, these high-performance binoculars are a great choice for those with uncompromising standards without an unlimited budget. Perfect for a wide variety of applications including birdwatching, safaris and other wildlife viewing as well as close-up viewing and use in less-than-ideal weather conditions.
Sizes Available:
•8x43 mm
•10x43 mm
•10x50 mm
•12.5x50 mm
These are discontinued and on for a very good price while they last.