what does porro mean and what does it do to make these binos better ?
1019755
Porro - prism binoculars are most identifiable by their unique shape. The inner design of the prism, which involves several types of reflective surfaces, creates a unique pathway for light. The light travels in a curved manner, as the eyepiece is slightly offset from the front lens. This necessary shape forces the large barrels of the binoculars to jut out to the side, creating a larger instrument. As a result, porro-prism binoculars are bulkier than their more recent counterparts, and can sometimes feel uncomfortable in the hand. However, people with larger hands often find porro-prism binoculars suit them well, as they feel sturdy and stable in a broad palm. Porro-prism binoculars are typically constructed entirely using reflective surfaces inside the prism. This means that when light enters the prism, none is lost or absorbed on non-reflective surfaces. Because all of the light passes through to the eyepieces, a bright image is produced. The resolution of porro-prism binoculars is also high. This occurs because images are not forced to split when passing through the prism, which is what occurs in roof-prism binoculars. In porro-prisms, images remain whole as they move to the eyepiece, allowing the user to see a high-quality reproduction of the outdoors.
2085150
Hola Eduardo, posiblemente se deba a que la Nikon la tienes en modo manual, y las medidas del obturador y del diafragma son diferentes en entornos interiores e exteriores. Puedes solucionar el problema colocando el modo automático.Te aconsejo hacer un curso sobre fotografía en muchos gratis. Pero de puedo recomendar este "http://experienciasfotograficas.com/". Es de lo mejor de lo mejor. Espero que te sirva la información. Olger Zamora
960847
The 7245 is a porro prism binocular with 6.5 degree angle, awesome image quality in light and low light. Stuart M.
1893998
Nothing - bought this for my 5yr old and ended up throwing it away. A good set of binoculars works better than this. My advice is return it if your within the return window (i was not)
2017205
They are a bit tricky to adjust and get used to. Try holding the binoculars and closing your left eye adjust the ring on the right lens till it's in focus then open your left eye and turn the middle dial until both lens are clear. One set up they are great easy to carry and great for distances my son and I used ours all over Bhutan and were very satisfied! Good luck
1111215
you need to follow the directions on the paper...binoculars have to be set up for the 1st use...or they will look blurry. There are specific steps needed to do it...
248884
Yes. You will need at least one pair of eyepieces of the same type to use the binos.
1911602
Here's the info I collected on the Trailblazer. I hope the table transfers well enough to read. Brand Model $ Type wt. in oz. field of view water proof fog proof min. focus in ft. exit pupil &lt;5mm prism diopter tripod Nikon Trailblazer 8x42 ATB $114 mid 23.6 367 x x 16.4 5.2 roof x 8x42 is the standard, 10x42, 10x50 & 12x50 for details in smaller species at a distance, compacts with a 30mm or greater objective lens size, any binocular with long eye relief and good close focusing ability; roof prism bak4 porro recommended for less expensive binoculars roof better for everything else
416812
The objective (front) lens have attached lens caps that snap on and then hang down when you are using the binoculars. They work very well. The eye pieces have a molded cover that fits over both and hangs from one of the straps. It is O.K. but a little inconvenient.
2176874
Well, while I really can't give a technical comment on the viewing distance, I can say that my wife recently used them at a concert at Gillette Stadium and was delighted with the performance. She was seated at the far end of the stadium and was able to get close up with these binoculars. When I asked her if she would have preferred to have had some larger and more powerful binos and she said no way. The small size and weight more than make up for any relative loss in distance viewing.
818456
APO stands for Apochromatic. It is a term used by Sigma to identify their lenses with this feature. It is used to increase contrast, color, and sharpness in images, as well as reduce chromatic aberration. Every brand has their version of this.
1713857
Hello, I would say the images for me are the same as I have the basic eyepieces and two sets of as you need two sets for the bino viewers but what I like is the eye relief that you get when looking through them and a almost 3d effect like you get when looking through binoculars. If you can afford it I would highly recomend it, not for just yourself but for other viewers as well. I have a Celestron 8SE and looking at Saturn, Jupiter, the moon, well its pretty awesome. My plan is to do astrophotography, if I was really into eyepieces I would go with the two inch and some nice Nagler eyepieces. Hope this helps, Good luck and dark skies. Hello, I would say the images for me are the same as I have the basic eyepieces and two sets of as you need two sets for the bino viewers but what I like is the eye relief that you get when looking through them and a almost 3d effect like you get when looking through binoculars. If you can afford it I would highly recomend it, not for just yourself but for other viewers as well. I have a Celestron 8SE and looking at Saturn, Jupiter, the moon, well its pretty awesome. My plan is to do astrophotography, if I was really into eyepieces I would go with the two inch and some nice Nagler... » Read More Hello, I would say the images for me are the same as I have the basic eyepieces and two sets of as you need two sets for the bino viewers but what I like is the eye relief that you get when looking through them and a almost 3d effect like you get when looking through binoculars. If you can afford it I would highly recomend it, not for just yourself but for other viewers as well. I have a Celestron 8SE and looking at Saturn, Jupiter, the moon, well its pretty awesome. My plan is to do astrophotography, if I was really into eyepieces I would go with the two inch and some nice Nagler eyepieces. Hope this helps, Good luck and dark skies. « Show Less
715341
Amigo, I got 3 diferent brand of polarized lenses, and u can tell they a,u can see very clear y feels good, and it says it on one of the sides, but the Wiley x valor ops, it doesn't say anything, and the advertising is tricky, I don't thing they are polarized, get what ever other brand, tha specifies so. See they take responsibility,for such product. So if u still have the chance, return them. This people! Unbelievable
734203
I haven't used mine much,they are to heavy and any little movement you lose what you are viewing.I should have bought a lighter binocular.
2182543
If you pull out the viewfinder you'll find a small dial. That's the diopter adjustment. It's great when you go from glasses to no glasses. Before you set it make sure you've actually had the camera properly focused on something first.
1209614
If you have big pockets. They are smaller than normal 10x42mm binocs but bigger than genuine compact ones.
876281
I have been deliberating over the choice between the two bino's also, can't find reviews for this thing ANYWHERE on the net! Do the dielectric coatings really add that much? Really hoping this thread will get somewhere. And Whitney, could you post the link for the review you found?