Q1: What type of lenses do the Nikon 10x42 Monarch ATB have?

A: They use a fully multi-coated optical glass with BAK-4 prisms.

Q2: What are the dimensions of these binoculars?

A: The dimensions are 5.6 x 5.0.

Q3: Is the Monarch DCF and Monarch ATB the same binoculars?

A: Yes they are the same.  The DCF is a European designation while ATB is the US.

Q4: What is the twilight factor?

A: The Twilight Factor is 23.

Q5: What binoculars would you recommend for a combination of at home use and hiking/backpacking use? I'd like something that has much stronger magnification than my little Minolta 8x25's. Was looking at the Nikon Monarch 10x42? I want it for looking at wildlife, looking at the mountains 30-50 miles from my house, (and being easy to focus, from one person to the other.)

A: Nikon's 10x42mm Monarch ATBs are a great all-around choice. They're light, powerful, rugged and have nice optics for binoculars in their price range. Both Monarch 8x42s and 10x42s placed in the top 10 among mid-price binoculars in the 2005 Cornell University Ornithology Lab's binocular reviews.

Q6: Is there an angled soft eyecup accessory for the Nikon Monarch ATB 10X40 available for separate purchase?

A: Unfortunately, Nikon does not make angled soft eyecup accessories for the Nikon Monarch ATB.

Q7: What is the difference between BAK 4 and BAK 7 prisms? What is a twilight rating?

A: BaK-4 and BK-7 are types of optical glass. BaK-4 glass provides better light transmission and brighter images. "Twilight factor" is an arbitrary measure that provides some indication of a binoculars low-light performance. It's simply the square root of the binoculars magnification multiplied by its objective lens diameter. A value (or "twilight factor") of 17 is considered the threshold for decent low-light performance. Higher values are better. Twilight factor alone, though, isn't a true measure of low-light performance. The type of optical glass used and optical coatings make a great deal of difference. Good coatings can allow binoculars with a twilight factor of, say, 17 to outperform those with a twilight factor a whole number or more higher.

Q8: Where is the glass made for Nikon Binoculars? What Country?

A: Nikon Monarch ATB binoculars are made in Japan.

Q9: Does the Nikon Monarch 10x42 ATB come with a strap?

A: Yes, Nikon Monarch 10x42 ATB binoculars come with case, neck strap, lens covers and lens cloth.

Q10: What is the weight of the Nikon 10x42 ATB?

A: Nikon Monarch 10x42 ATB binoculars weigh 21.2 ounces.

Q11: Hello, I would love to buy these Binoculars however my eyes are a little on the narrow side and my concern is not being able to see through both eye pieces at the same time. Do you know the distance between the eye pieces at the narrowest width? Thank you

A: The interpupillary distance adjustment for the 10 x42 Monarch ATBs is 56-72mm.

Q12: How much does the Nikon 10x42 Monarch ATB weigh?

A: The Nikon 10x42 Monarchs weigh 1.3lbs.