pat mitchel
Well-known member
Forgive my ignorance in the small roof binos category, but the use of dielectric coatings does not seem to be common on compact roof binos. Is there a reason for that or simply economics? Regards, Pat
The p-coating is a dielectric coating, too. Also - dielectric mirror coatings are not that much of an upgrade. For example all the Fujinon KFs or the respective Sightron/Kenko models which were still made a little while back have silver coatings and the difference in brightness is not as great as one might imagine when comparing them to similar models with dielectric coatings.The dielectric coating has nothing to do with phase correction and was a big upgrade over the older silvered mirror surfaces bringing an upgrade in light transmission for a brighter image.
On higher end binoculars it’s become the standard.
Price probably. The dielectric ones need at least 25 layers or even more.I'm referring specifically to the coatings that are doing the reflection in place of the silver (or aluminum in earlier roofs) coats that provide the reflection. Better??? Again, they use them in 180 dollar US 8x30's, why aren't dielectric coatings used on a mid priced compact? Pat
Whaaaaaat??? I've still got more to learn??? Just when I thought I understood, I find out more stuff...The p-coating is a dielectric coating, too. Also - dielectric mirror coatings are not that much of an upgrade.
Doesn't it? According to Leica both the Trinovid and Ultravid compacts have HDC (transmission multicoating), P40 (phase), HLS (dielectric mirror), and AquaDura (hydrophobic) coatings. So I expect you'd have to go fairly cheap to not find it.the use of dielectric coatings does not seem to be common on compact roof binos. Is there a reason for that or simply economics?
And my 7x21 Curios are damn bright, I have no idea what coatings they have, but they sure pass the eye test.Doesn't it? According to Leica both the Trinovid and Ultravid compacts have HDC (transmission multicoating), P40 (phase), HLS (dielectric mirror), and AquaDura (hydrophobic) coatings. So I expect you'd have to go fairly cheap to not find it.
I'm aware.Hi Philipp; Understand I'm not being critical of silver or aluminum just trying to frame the fact that dielectric coating for reflection seems to be the latest/greatest (marketing) that is supposed to improve the optics and seem curiously absent for compacts when it's applied to most of the other classes of roof prism binos.
The effect is not "major" though. If it was, there would be a much bigger difference between old porros and old roofs than there actually is as everybody can confirm who compares a porro from the 70's with a roof from the 70's of otherwise comparable quality and price.Binoculars that do not have this layer have a low contrast, having a major impact on the optical quality