[6.6' / 2 m] I'm 76 year old. After long search for binoculars for my birdwatching hobby and trying different models including vortex, this is my choice. Very happy with Pentax 10X42 S-Series SD WP Binoculars.
Mary

[42 mm] Clear, and gathers light good at dusk. Not bulky ,but easy to use.

[Roof (BAK4)] The field of view is just like they say they are. Easy to use on a boat or land. Crisp clear and easy to adjust from near to far images. They got 5atars because they deserve it my only problem with them is the top lens cap comes off easy in the case.

[42 mm] very good binos. i was wanting to get vortex talon or Nikon monarch7. i have looked through monarch 7 and wanted that super clear glass. After a lot of research i kept reading about these Carson 3d ed. im glad i got them. they have excellent glass. i would say rite up there with the Monarch 7. but half the cost. build quailty is excellent and life time warranty!! the case and back strap are very nice as well. high recommend!!

[42 mm] They are every bit as nice as expected based on the many reviews i looked at. I looked at the new Nikon Monarch 5 and these are every bit as nice. They really shine at night; looking at stars or big city lights. They also have fantastic clarity and true color resolution. They also come with very nice lens caps now, that say Carson.

[4.2 mm] The Eschenbach Optik 8x25 Sektor compact binoculars are a hit for me and my usage. Great travel bino's, fit in the carry on pack, and small enough to be in a pocket when out and about. I do a lot of traveling and it is nice to have a pair of bino's handy. These are a great middle ground in price and optics. The size never causes you to think, should I leave these or bring them? These are very fine binoculars, and unless you are more image conscious you will love these. If you need or want a small compact bino's, you can't go wrong with these. I am very pleased.

Cheers...

[4.2 mm] Swarovski 10x52 NL Pure is a wonderful new addition to the NL Pure line. Super sharp / Super resolution. Great performance in low light.
Ergonomics are so comfortable in the hands. The just over a half inch in barrel length and roughly 6 ounces in additional weight versus the Swarovski 10x42 NL Pure are so worth it for the gain in low light performance and resolution. The 10x52 NL Pure is now my go to Binocular. B&H is a terrific seller, I have been buying from them since the early 90's. Thank you B&H for the fast shipping and very good shipment packaging.

[Roof (BAK4)] I was expecting pretty good quality at this price. Definitely not disappointed!
There aren't a whole lot of choices in the lowest power range of 4x, and this one was the lightest weight while also having a center manual focus knob and a right eye diopter adjustment. I am nearsighted with astigmatism and there is a significant difference in my glasses prescription between left and right eyes, so I need the diopter when using these without glasses.
With glasses on, however, the view was also great. Many binoculars give me a very restricted field of view when I keep my glasses on, but the restriction of these is minimal. I've seldom seen this from any binocular and I'm delighted.
Outdoors in bright daylight I did not see the slightest evidence of chromatic aberration anywhere in my field of view, with plenty of sharpness all around.
Inside the concert hall, I can view performers without trouble and I'm not having to inspect their dental work at this magnification.
These are so light that I can forget I am carrying them. Not mentioned in the blurb is the cleaning cloth, the pouch with belt loop, and the perfectly-sized neck strap. No need to buy accessories!

[15 mm] Wanted a nice pair of opera glasses (for the opera, actually) and wanted something very traditional and stylish. These hit the mark, and the optics are very good as well. Can't wait for the shut-downs to lift so I can actually use them.

[10x] Image quality is very good, true to color, despite the small 18mm lenses they are very good in low light. I used them as opera glasses and they are perfect due to their clarity and the wide field of view. Outdoors they are also nice to use due to the wide field of view. I didn't think the close focussing distance of about 20 inch is very useful but it turns out it's nice to look at flowers, butterflies, frogs and other shy wildlife. They are also super lightweight. That helps a lot for their use as Opera glasses. They seem to be sturdy though. The right diopter once adjusted seems to stay the same throughout the entire focussing distance. The lenses are recessed and well protected from accidental touching and scratches. The eye relief is good. The only drawbacks I can think of is that they might not be the most robust Bino's due to their lightweight construction and the overall look of the white plastic housing looks a bit cheap. A grey-ish finish like expensive DSLR lenses would have been better. The ocular rubber can be folded over to use them with glasses on. This is a bit cumbersome when you hand the binoculars back and forth to your partner who doesn't have glasses. A system like on my 8x20 Zeiss binoculars would have been better.