Q1: Are there any instructions for these?

A:

All of the manuals are downloadable from the Zhumell website in PDF (Adobe Acrobat) format. The link directly to the Tachyon manual is:

http://zhumell.com/manuals/tachyon_manual.pdf

Q2: I am interested in this Zhumell 25x100, besides looking at stars, can it use for other outdoor activities as viewing birds and sailing regatta.

A: Absolutely, although with that high of a magnification you will definitely want to keep it with a tripod.

Q3: Is there much of a noticable difference in what I will see in the night sky [planets, nebula, moons, ect] in viewing between the Zhumell Tachyon 25x100 and the Zhumell Super Giant 20x80 Astro-binoculars.

A: The difference is that the magnification will bring things 5x closer with the Tachyon.

Q4: I'm thinking of purchasing a set of Tachyon 25x100 binoculars as I over look a harbor I like to look at the ships in the distance. Could you please tell me if these binoculars set up on a tripod would be suitable for that purpose? And would you send me details of the type of tripod?

A: These would definitely be a great choice for that use. They are designed to work with any standard photographic tripod the one we sell the most with these are the Zhumell proffessional tripods.

Q5: How much is the weight, length and width of this binoculars?

A: The weight is 9.75 lbs., the length is 15.4 inches and the width is 10.8 inches.

Q6: We travel a lot and spend a lot of time in the blue ridge mountains and like to use our binoculars to see into the valleys. We have 28x80 and are interested in the tachyon 25x100. Would this be a good binocular for this application?

A: It would definitely be a great binocular for that use, generally as you get higher than this in magnification the binocular is either a zoom or it is just too large to really carry around with you. These are big, but the aluminum case it comes with is nice for traveling.

Q7: Will the 25x100 Zhumell show the rings of Saturn and the Cassini Division? How well will it perform on galaxies, nebula's, globular clusters?  Will it show the 2 cloud bands of Jupiter and are the binoculars employed with BAK 4 or 7 prisms? 

A: The minimum objective size to see the Cassinin Division and cloud belts of Jupiter is 60mm these have 100 mm objectives so, yes, it will be good for deep space viewing. They use a BAK-7 prism in them.

Q8: Will the Zhumell 25x100 with BAK 7 prisms give pinpoint star images as well as a BAK 4 Prism? Will it perform as well as the 25x100 Skymaster binocular?

A: The BAK-7 is not as fast for light transmission as a BAK-4 prism. So there will of course be some light dispersion but you will get that even with a BAK-4 which will cause a slight blurring on the edges of stars. There really is no way around that as we are trying to gather light from millions upon millions of miles away. The tachyon definitely performs as well as the Skymaster.

Q9: I wear glasses, would this item be good for my eyes?

A: Because this is an individual focus once you focus the binoculars they are set for your eyes to view distance, this makes them good with or without glasses.

Q10: Where are the tachyon binoculars manufactured?  Where are the lenses ground?

A: Both the lens grinding and manufacturing is done in China.

Q11: Do these use a BAK 4 prism?

A: The Zhumell Tachyon 25x100 binocular does indeed use BaK4 glass in its prisms.

Q12: How many elements make up the eye pieces? What percent of the field of view is sharp?

A: The Tachyon's eyepieces contain three elements. Because the binocular uses BaK4 prisms, the entire field of view is sharp.

Q13: Are these binoculars achromatic or apochromatic? I would rather not deal with any chromatic aberration. How hard is it to aim these? Is it possible to mount a simple red dot finder to them or is it not needed?

A: The Zhumell Tachyon 25x100 Astronomical Binoculars are achromatic. It probably would be possible to mount a simple red dot sight on them, but there's probably no need.

Q14: Are these waterproof?

A: The Zhumell Tachyon 25x100 Astronomical Binocular IS waterproof.

Q15: My heavy duty tripod does have the quick release plate, and I do have the plate w/bolt that I used for my video camera. Would I still have to have an L bracket to hook up the Tachyon 25X100 to this tripod?

A: You will not need an L-mount adapter with the Tachyon 25x100 Astronomical Binocular. It has a tripod adapter that will mount directly on the tripod.

Q16: Which Tripod is the best for the Zhumell Tachyon 25x100 Astronomical Binoculars?

A: We recommend the Zhumell Heavy Duty Tripod for use with the Zhumell Tachyon 25x100 Astronomical Binoculars.