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please recommend some good binoculars.

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Initial post: Apr 4, 2010 2:05:51 PM PDT
My parents were visiting a relative recently and really liked some bushnell auto focus binoculars my mom's cousin had. I got the product information from my mom's cousin. The binoculars are BUSHNELL XTRA WIDE SELF FOCUSING 13-421. I was going to get them a pair, but my mom said they thought this model was a little clunky. I have been scouting around for binoculars with similar capabilities but are maybe not so clunky. Any advice would be appreciated.

Posted on Apr 16, 2010 2:38:42 PM PDT
I would like to get Nikon 7218 Action 10 X 50mm Binoculars to use on our SouthAfrican Safari. But I am totally novice. Please advise which will be the best one to get around $100.

Posted on Apr 24, 2010 2:46:46 PM PDT
F. Hoyte says:
Could you explain to me the dimensions with binoculars like 7x50, 10x50 and so. This information would definitely enlighten me besides the the manufacturer the varian spec about binoculars. I understand cameras, but binoculars, please help.

Posted on Apr 25, 2010 7:24:45 AM PDT
snafu59 says:
the first number is the magnification power, the second number is the size of the objective lens (the front lens) in mm.

7x50 means 7x power, and 50mm front lenses.

Posted on Jan 21, 2013 5:50:40 PM PST
Last edited by the author on Jan 21, 2013 5:56:47 PM PST
Hi! As "snafu59" said, the first number in a binocular's (binos) size description is the MAGNIFICATION (MAG) at the eyepiece (EP), the part you look through. It tells you how many times closer than the naked eye the image will be. The second number is the OBJECTIVE LENS (OL) size in millimeters. This determines how much light the binos can concentrate on the image. This is all limited by the pupils in your eye and how much they can dilate (expand) in the dark. If your eye pupil can't dilate as much as the size of the exit pupil in your binos, you will not be able to take in all the image and light, and you will be wasting your money. It's like trying to drink from a fully open fireman's water hose. Children, youngsters and people of about 30 years or less can usually dilate to 7mm, the human maximum. Older than this and your pupil dilates to no more than somewhere between 4 to 5 mm. You can have it measured by your eye doctor or go for the general rule I just explained. To measure the EXIT PUPIL (EP) of your specific binoculars so it better matches your eye pupil when dilated, divide the second number (the OL) by the first (the MAG). In 10X50 binos: 50 divided by 10= 5mm. That's good for all ages. In a 10X70 binos: 70 divided by 10=7mm. This binos would be better for the young. There's some controversy about this by those who say: what if the binos are used only in bright daylight? The better questions: what guarantess that you will never use them at dawn, at dusk, cloudy skies or to observe the wonders of the night sky? Do you live in area with no light pollution and a perfect dark night?

As far as specific recommendations, the binos usually considered the most versatile are the 10X50. Considering that top binos in the Zeiss, Swaroski and Leica brands can cost $2,000 or more, the very good quality budget alternative is the Redfield Renegade 10X50, with the (porro prism) traditional look ($114 on Amazon) or the Redfield Rebel 10X50 ($150 on Amazon) with a double straight tube look (roof prism). These weigh about two pounds. If you can't hold this weight steady, you will have a jumpy image and feel sick (try holding two cans of soup). You might try to go to smaller and lighter binos sizes. I recommend all the smaller ones in the Redfield brand because of the amazing quality for the low price. This brand is associated with Leupold, a brand that makes much more expensive binos. You can easily, conveniently overcome the weight problem and enjoy higher visual power with a chest pod ( $35). It easily holds 5 pounds of binos (or cameras) and weighs 5 ounces. There's a dizzying array of lots of brands and features out there. It is a time consuming search. If you're still interested in other alternatives go to My comments were made on 1-21-13. Remember: binos enjoyment is a VERY personal thing, visit your local store for a good benchmark to start.
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Discussion in:  Binoculars forum
Participants:  5
Total posts:  5
Initial post:  Apr 4, 2010
Latest post:  Jan 21, 2013

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