What is the approximate field of view (in mm) using the lowest power objective?
1683030
"When seen in the picture, The max height of field of view is approximately 0.85mm with 10X objective. The width is longer about 1mm."
506297
I believe the minimum focal length was around 35 feet. This was a pretty good scope for the price. However, the front lens is held in be a really flimsy plastic retainer. Mine broke after about a year. I'd suggest a Bushnell sentry scope, more pricey, but they have a bullet proof warranty.
52207
It's the lens, a 2.8mm will give you the widest possible view, 12 being the closest.
605356
The user guide says that the "field of view is fairly small. It is approximately equivalent to the field of view through the telescope when looking through a typical (i.e. not wide-field) 5mm focal length eyepiece." So maybe 200x ?
1460487
75-100 yards, more or less. You're not going to get much resolution after 40 yards or so. My numbers are rough, novice, estimates, though.
107802
That equation is correct... it is called spherical equivalent. With a -3.00 sphere and -3.25 cylinder, your spherical equivalent is -4.50. Keep in mind this will give you pretty decent vision - good enough to see at a reasonable distance, but this will not be equal to a full spectacle prescription. I am an optometrist.
1870313
I have no experience with one other than the built in optical finder. I suppose one of the shoe finders in the 50 to 55mm range made for full frame cameras might give an approximate field of view. I think some are sold under the Voightlander brand name, but watch out for size because some can be large for so small a camera. Sorry I can't be of much help. Don.
492744
Optimum Eye Relief (in) 12-20 SPECIFICATIONSMagnification 2 - 7X Obj. Lens Diameter (mm) 32 Exit Pupil Range (mm) 15.07-5.23 Field of View @100 Yds 60-16 Optimum Eye Relief (in) 12-20 Parallax Setting 50 yds. Click Adjustment Value 1/4 Adjustment Range 45 - 45 Transmission(%) Day/Night Weight (ounces) 7.50
577394
Close to medium range. Of course a lot will depend on the, if any, ambient light there is available. The ir light is decent.
1575992
viewfinder is not great, but yes you can get a general idea...don't expect high clarity
1473035
It's clear up about 15-20 ft. You can see further but it's hard to make out the object because the image gets smaller as you look further.
688532
It depends on the distance. This device is nice but will only give you clear image in the range of up to 50 yards. Beyond that things will not be clear and recognizable.
1490057
Tongfeng Z. A good question. My throw distance is about 20 feet which makes an image 20 feet from corner to corner. I will try 10 feet tonight and let you know. There is a zoom function so I will give you the minimum and maximum.
381969
2nd answer. If you mean the closest distance you're able to focus at? I can only guess at about 15 to 20 feet. If you mean the closest distance you can calculate by using the mildot system I would again guess as close as you can get a clear focused picture. Mine gives me a very clear picture fifty yards and out but I could not honestly tell you the minimum useful distance. KT
1318880
Nikon says that at 1000 meters the FOV is 163 meters. Since a yard and a meter are only differ by about 3-inches you would probably be safe to guesstimate the FOV is on the order of 163 feet. Looks here: http://nikon.com/products/sportoptics/lineup/binoculars/aculon/aculon_a211/spec.htm
238184
These binoculars hinge in the middle and the IPD ranges from about 55mm minimum to a maximum of 70mm at the widest. I hope this helps.
935900
You can look as far as you want. I've looked at the moon and saw more detail but that is not its purpose. I would say it is most effective when looking at a specific object under a mile. I have used mine while hunting and most objects are within 500 yards. You should ask yourself what is the main reason for buying the monocular. For sporting events or hunting, it is great but not so great for astronomy.