----------------------------------- Dbird 03 Sep 2019 16:50 ----------------------------------- Mi-am luat inima in dinti si iam scris domnului Lederman despre review-ul meu si doua nemultumiri: prima fiind modalitatea grea prin care eu obtin efectul 3D si a doua pretul prea mare. El a avut amabilitatea sa imi raspunda in doua mailuri urmatoarele: "Amazing work! I can tell that you spent a lot of time on this. I will spend time as well reading it carefully. As the inventor of the Lederman Optical Array, I want to give you quick feedback and an initial reaction. In November 2014 I realized that I could finally create 3D views of the night sky if I could make precision optics and mount them on a precisely made optical flat. Some experiments proved this much to my amazement! Then came the work to optimize this new and amazing way to see the night sky. After many months of testing my own D21s fitted with the array through a variety of telescope designs, I came to the conclusion that many experiments with each individual array panel and the displacement power and direction would be required. In addition, I needed to design a new eyepiece because The D21s did not allow access to the ideal position of the array in relation to the ep focal plane! Furthermore, binoculars design, ep focal length, cementing technique, panel arrangement ALL had to be experimented with by ME. It was new territory! That said, I had to be very objective in my assessment. Example: I created plano glasses fitted with a different array in order to see fireworks in 3D. It worked. But success was dependent on distance from the fireworks. I did not fo forward with it. Too dependent on ideal parameters. I found my binoculars to be easy, instant, very user friendly even fir novices and especially for experienced observers. There were a few who had trouble seeing the 3D. Example: At Chiefland Star Party many observers were instantly thrilled with the 3D. Then a few could not seem to differentiate it from a flat view. Curious! I hope that you allowed many others to look through them in order to assess the ease of seeing the 3D effect. Two nights ago in my suburban sky I grabbed my own pair to look up at The Dumbell. It was seen. It thrilled me once again to immediately remember what I created and why. The community has not adequately supported my work and so I will discontinue creating any new product for astronomy. We as a group are aging, shrinking, and mist damaging, buying used second hand products of mine here in USA on Cloudy Nights and Astromart. This was a quick answer. I will carefully read your email more! Best Regards, Russ" respectiv : "Ok Dorin. I do think that you are obviously and easily seeing the 3D effect when looking at say a hedge row or a bush during the day. Your Sketch proves this. So the function is quick, instant and easy. However, it is clear that a night target like star field is giving you some trouble. It is a perceptual thing. The variables that determine ease of seeing the 3D must also include your own complicated eye/brain/psychological makeup. All that I can suggest when assessing how easy it is to use The Spacewalker Binocs is to have at least 5 others or more try them. A lawn chair and darker sky is all that is needed. Price? I chose phase corrected coatings and a dielectric coated splitter in the binoculars. My array panels are 1/10 wave flat, the optical window us also 1/10 wave flat, and all are fully multi-coated. These are for you astro-nuts!!😉 I am going broke as it is. $299 for these is a great price. I must discount them for dealers like B&H Camera too. OK. So where did you buy them? They are the genuine piece. I know because I test and finish each one myself. Best Regards, Russ" Daca cel putin deocamdata se pare ca am o problema creier/ochi (Tudor ? Esti aici?) si mai trebuie testat si ochii altora, pretul devine clar umflat pe parcursul comercial de la $299 la $485.98 cat se vinde la noi... cred ca va urma...