Hoya 1.71

[Robert Wagner]

I have been hearing that Hoya is discontinuing the 1.71 in all of there lens styles, and using a 1.70.
Does anyone know why? I think it is a legal thing, however I don't know.

Robert
;)

[karen]

Robert, they came out with the first 1.70 product right before I left Hoya San Diego-it was my understanding that there wasn't really any difference. In fact, I don't even remember anybody saying anything to us. I am sure there is a reason. sticklert- are you out there?? (he may be at the show) I think the bottom line is it's essentially the same good stuff. Now that I read this, it doesn't really answer your question does it???:D

[OregonOptician]

Hi all, Well what I have been told is that the 1.71 was too brittle to do a good job on Drills and grooves. I have had that experience myself as a matter of fact. The 1.70 is supposed to be Higher tencle strengeth. This way it can be used in a more constitant manner. If you Look at he math, the only place the diffrence would make the lens any thinner is in the much higher Rx's and the balance for less chipping and staring is a great trade off.... I just Hope that it holds to be true. I have had trouble with a standard metal mount starring around the edges on the 1.71 . this shows the brittleness.

[sticklert]

Just got back from Vegas. Great Show this year thanks to all the HOYA Supporters out there. To answer the original question posted the 1.71 did indeed have some issues due to the fact it was very brittle. You could not drill it, and in some cases edged it without it cracking. HOYA recognized that problem and developed a better 1.7 product that is acutally much easier to process while still giving you a 1.0 CT, 36 ABBE, and improving the tensile strength to 132 lbs of pulling pressure. HOYA has converted ALL 1.71 product to the new 1.70 Eyry material.

So it was not a legal thing it was HOYA reacting to market changes and feedback from its customers to bring to market a drill-able ultra high index lens.

please refer to the link below to learn more:

http://www.hoyaopticallabs.com/170_eyry.htm

[Billy Brock]

S,

great to see you at the show , as always you guys are are a wealth of product knowledge ....... thanks for taking the time to personally help my clients ! !

B

[sticklert]

Thanks Billy,

It was great to see you at VE. You are a fine craftsman and your work speaks for itself. Good luck!, and continued success.

Todd