Major Pete Knight flew the X-15A-2 to a Mach 6.70, making it the fastest piloted flight of the X-plane program. Optical Components: Along with APO lenses with ED glass elements and like some Zeiss binoculars, these new Vortex Razor UHD use the Abbe-Koenig roof prism design with has 100% internal reflection. Whilst the best Schmidt Pechan roof prism binoculars (like those above) with dielectric mirror coatings get extremely close but still are only able to reflect 99.9% of the light.

Equipped with a 12-megapixel image sensor, the X-42 delivers sharp and detailed photos. It has a fixed focal length lens, allowing users to focus easily on their subjects. The camera also offers a digital zoom functionality for getting closer to the action. Field of View –Here they pretty much match the Vortex Razor UHD, which as I have already mentioned is excellent and often an important feature to look for in a birding binocularClose Focus: Whilst not quite as good as the Vortex, I consider anything under 6ft as excellent for a full-size binocular.

highlighted in red are weaker aspects when compared to the others on the list. Note: this does not mean that this is bad, only that in this area they not quite as good as the best. My Thoughts & Recommendations: Weight & Size: A strength can often turn out to be a weakness in another area and so the larger and heavier Abbe-Koenig prisms directly contribute to these binoculars being both larger and heavier than the others on your shortlist O’Shea, Claire (12 June 2023). "Next Generation Experimental Aircraft Becomes NASA's Newest X-Plane". NASA . Retrieved 13 June 2023. The focus wheel on these feels superior than the previous generation. The depth of field is so much greater in these as well that you barely have to move the focus, and if you need to snap to something close up, the focus is very fast and buttery smooth. I’ve never used the Nikon EDG optics, but people always talk about that focus wheel as being the best ever, and perhaps this one is close to that level? I’m not sure. a b Harrington, J.D.; Kamlet, Matt; Barnstorff, Kathy (17 June 2016). "NASA Hybrid Electric Research Plane Gets X Number, New Name". NASA.gov. NASA . Retrieved 17 June 2016.X-51 Waverider makes historic hypersonic flight". US Air Force Public Affairs. 26 May 2010 . Retrieved 27 May 2010. Jordan, Holly (2006). "Active Aeroelastic Wing flight research vehicle receives X-53 designation". Wright-Patterson Air Force Base. Archived from the original on 5 June 2011 . Retrieved 11 May 2010. there really is no bad choice. Rather it comes down to which pair has the most strengths and least weaknesses in the areas that are most important to you and the particular way you use your binoculars:

The X-42 features a built-in flash, enabling users to capture well-lit images even in low-light situations. It has a variety of shooting modes to choose from, including portrait, landscape, and sports, catering to different photography needs. Additionally, it provides various white balance and exposure settings for achieving the desired results. Hello everyone, please forgive my use or not of proper words and phrases for description of the above binoculars. If money is truly no object and you simply want the best-of-the-best 10x42 birding binocular and are prepared to carry about a slightly heavier and larger instrument, then I would probably opt for the Vortex Razor UHD for birding as you also need to consider that these have the closest minimum focus distance and the widest field of view which for bird watching is always a good thing. Not built. The Convair NB-36H experiment, a B-36 modified to carry (but not powered by) a nuclear reactor, flew from 1955 to 1957. [16] [17]

So, I am wondering if I could grovel a little and ask you to add your two-cents worth by adding your evaluation of the Zeiss in with the other 4 binos? Firstly thank you for sending in your question to the BinoWizard and I can see that you have already carried out a lot of research already which is great as it really helps me to better answer your question.