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Praktica Roof 10x25

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£19.09 Best Offer by: amazon.co.uk marketplace See more offers
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    Your dooyooMiles Miles

    1 Review
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      01.02.2010 05:55
      Very helpful
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      Budget optics, but more than good enough for ordinary use.

      Having owned a pair of these binoculars for years, I would highly recommend them for casual use. They usually stand on a table near the window and are used to look at birds in the garden, but they fold up and are eminently pocketable, and regularly get taken on walks, for identifying wildlife.

      The first number, 10, is the magnification, and the second, 25, the objective (front lens) diameter in millimeters. 10x magnification is ideal for birdwatching while at home or walking in daylight. Few binoculars have greater magnification (if they did it would be difficult to hold them steady enough, as "shake" is also magnified), but the objective lenses are tiny: military-style binoculars have objectives of around 50mm, which gives them more than four times more light-gathering power. These small binoculars give an image that is somewhat dimmer than the uninterrupted view, but perfectly useable, however they are not useful as "night glasses". As opera glasses they are at least better than the ones found clipped to the back of the seat in front.

      They are plastic coated and seem robust; they have survived years of normal use in rainy Britain, though I don't suppose they are truly waterproof. I have never actually dropped them, but they do not feel fragile. One eyepiece has diopter adjustment to accommodate differences between the eyes. The adjustment range is more than adequate for anyone with reasonable vision: if you have only one effective eye, buy a small telescope! A shortish neck strap (which I prefer as they don't swing about) and a soft carry case (I always just put them in my pocket) are included.

      The lenses are coated to reduce aberrations, but for this price - there are similar binoculars costing 20 times more - one can't complain. Centre sharpness is reasonable. Peripheral sharpness and colour haloing are terrible, but then the creature I am looking at is always in the centre of the frame anyway. The field of view is narrow (about 5 degrees) and you may struggle to find the area of interest. Colours look muted, though the hazy British atmosphere is as much to blame here as the optics. The small focussing wheel is a bit fiddly and tracking advancing/receding targets is not really an option. The 16 foot close focussing distance is reasonable, though garden birds may at times get closer than this.

      In short, these are ideal for anyone with a casual interest in birds or wildlife - on my regular walks I like to think I can identify any vertebrated animal I might happen to see - but not suitable for those who would call birdwatching a hobby and wish to watch for long periods. Any bird too far away to be identified through these binoculars would probably be too far away to spot in the first place.


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