Does the magnificaton not really have anything to do with it?
2006-07-24 04:15:20 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
The objective lens controls how much light is collected. Since most binocular object are large and dim, the light gathering ability is the crucial variable. Also, if you are holding the binoculars with your hands (rather than on a mount), it is difficult to have enough stability for the larger magnifications. Anything over 10x should be mounted. Astronomical binoculars should have objective lenses of at least 50mm. I have found that magnification has some effect, but not nearly as much as many beginners think it will. In a choice between 7x50 and 10x50, the 10x50 will have a larger image and so some extra detail will be possible. On the other hand, some objects are too big to fit into the field of view of 10x50s. A good pair of 7x50s are wonderful for bright comets!
2006-07-24 05:06:32 · answer #1 · answered by mathematician 7 · 3⤊ 0⤋
Any optical device the format is usually a determine X a 2d oftentimes larger IE 8x20 or 10x40 the 1st determine is the magnification in that this is the upward thrust in length of the object you're finding at. the 2d determine is the object container in mm. this isn't something to do with the lens or the size of the lens. once you look througn binoculars or a spyglass you will see a clear out interior and aperture which limits the quantity of sunshine and the part of the lens used. so which you will locate that a pair of 10x50 could have a larger magnification yet would be using a smaller element of the lens to that of a pair of 10x30. bypass to a great digital camera shop and clarify what you need to do. you would be supprised on the respond you get in that finding at close astral bodies you won't be in a position of beat the human eye yet use the curvature of the earth as your optical device. have you ever observed that with the aid of fact the sunlight or moon rises above the horison it seems larger than whilst this is extreme in the sky.. this is in basic terms by the fact the ambience is appearing as a lens. you will in all risk be offered an SLR digital camera equipment with a 35-seventy seven mm lens and a fifty 5 to 2 hundred mm lens on a straight forward tripod. improve the tripod and get one with an azimuth pan or set your pan attitude to 20 levels. Then use a sluggish shutter or dichromatic action picture you would be astounded with the aid of the conventional you hit upon as a beginner you are able to produce.
2016-10-08 06:35:22 · answer #2 · answered by ? 4 · 0⤊ 0⤋
What you really want is to get the brightest looking view possible, which requires making the exit pupil of the binoculars as close as possible to the same size as your eye's pupil, which in the dark is usually about 7mm. The exit pupil size of any binoculars is the objective diameter divided by the magnification. So for 7x50 it is 7.14mm, pretty close to 7.
2006-07-24 05:08:40 · answer #3 · answered by campbelp2002 7 · 0⤊ 0⤋
Just chiming in to agree with mathematician's excellent answer. Prakash doesn't have clue what he's talking about....the size of the objective has nothing to do with magnification.
2006-07-24 05:42:17 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Hey, Prakash, it's the FOCAL LENGTH of the objective, not the diameter, that partly determines the magnification.
2006-07-24 06:47:11 · answer #5 · answered by David S 5 · 0⤊ 0⤋
greater the objective lens,greater the magnification
and the length of the telescope depends on the objective
2006-07-24 04:50:43 · answer #6 · answered by Prakash 4 · 0⤊ 0⤋