Russian big binos 30x180mm and 20x140mm !

Hi!
I was woundering if anyone knows anything about this big russian binos ( 30x180 , 20x140 ). I'am interested in tec spec. on both binos. I've herd that Markus Ludes knows quite a bit about this binos?! Has anyone made a review on this two?

/ Anders Asp

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I have not seen these but I have heard from others that the optics are good EXCEPT for color. The original versions had a strange tint on the objective coatings, shifting the image color significantly. There is supposed to be an "astronomical" version with more suitable coatings but my guess is that this version may show chromatic abberations that the original coatings hid (the optics appear to have a very low f ratio so are likely exhibit color even if they use special glass).