Opticron Discovery WP PC 8x50 Binoculars, Black

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I have only used a BA, my 8x42, but have also wondered about this, and will share my second-hand "knowledge". The Opticron Discovery WPPC 50mm series waterproof roof prism binoculars are compact in design. They offer a stylish, fashionable, and user-friendly field glass with a variety of features, including a wide field eyepiece, close focus to 6ft, and a narrow field. Read Review For telescopes, the optical diameter (also known as aperture) is the size of a telescope's main light-collecting lens or primary mirror, measured in millimeters or inches. Telescopes with larger optical diameters collect more light, which leads to an increase in brightness and image resolution compared to smaller instruments.

The name Trinovid was first used in 1958 with the first series of the Trinovid range. This is today a rare and expensive beast as only a few hundred were built (attached is a picture of the 8x40). The name came from : My pentax 8X42 binoculars have a 7.5 degree field of view, and they aren't even considered to be wide-field binoculars. Seems like there is an opening for someone to make a wider field finder. Given the test results of the Zeiss, its better Close Focus and FOV, it looks like an excellent choice for you. The KS comment says it's the best low-light 8x model they've tested. The distance between your eyes and an eyepiece while you see the entire field of vision is called eye relief. If you have glasses, this is an important spec. I'm guessing the prisms they use to erect the image are also too small to support a wider field of view.If I was looking at an 8x50 it would not be the Leica as its field of view is only 115m the same as the 10x50. I would go with the new Swarovski 8x50 EL. But most Dobs as well as a variety of other scopes have their finder mounted at an angle. This means the finder crosshairs are not aligned with the chart cross hairs and it's more difficult to navigate the night sky. When they are aligned, it makes precise pointing much easier because I can align the cross hairs with stars I have identified on the chart and bingo, the object is centered in the FOV of the main scope. Please complete the form below for a quote - Please be as accurate as possible to help us give an accurate quote. I’ll be quite interested to see if the new 8x50 Ultravid HD has less lateral color. I wouldn’t expect much improvement from a change in objective glass. Right now I consider the prime suspect to be the simple 4 element eyepiece used in the 8x50.

According to Peter Abrahams list the Hensoldt Dialyts first appeared in 1905 with a 5x35, after their first roof prism bin in 1897. A 25mm Plossl gives 6.1 deg. I don't know of anything that needs 8 deg. 52 deg is not an expansive afov, but is sharp, and long eye relief for winter eye fog. Also my amici prism 20mm clear aperture may be an issue. A bright 6.25mm exit pupil will be nice. In the case of board building materials, the threadless part of the screw must not be longer than the fixture, and the UX with rim is to be used. To update my last post, I have since had the time to do the owling I was hoping to do, and I would like to amend my previous answer. In low light, the 8x50 Trinovid outperforms my 8x42 Trinovid (classic) in a more than noticeable way. Using the 42mm's in extreme low light was simply unsatisfactory; I found myself squinting trying to see detail that was plainly visible in the 50mm's. The larger exit pupil really does make a difference, to the extent that I don't think I really need the 42's, my 32's being my optics of choice for most other daylight viewing (although the 42's are an excellent compromise if you only want to have one binocular). For the less adventurous among us, we have to deal with a stiff focuser the rest of the year when we're birding in fair weather, and I can't see the point of that.Is it smooth or rough to turn? I've read some comments that Leica improved the focus on the HDs and that they are easier to turn than the BRs, but then a HD user with a stiff focuser posted a comment that seemed to contradict that, so I'm not sure what to believe about the HD's focuser. Smoother than the BR's or not? I have been against ten power binoculars since I first started birding, but the 32mm Ultravids are very easy to hold steady, even though, when I first tested them, they seemed too small for my hands. But birding in Arizona especially convinced me that I needed more power; there were too many times when I wished I could see just a little more detail to positively ID a bird (and the wide open spaces in the desert allow for much more long distance birding than here in Michigan). My 8x42 Trinovids were my main binoculars for many years, but on some days they are actually too bright - watching hawk migrations on clear days would give me a headache.