I fear this is not possible as long as you donīt send in the respective lens to the guys to get it messured. There is NO general way to calculate it, if you do not know the design strategy of the...
Type: Posts; User: xiaowei; Keyword(s):
I fear this is not possible as long as you donīt send in the respective lens to the guys to get it messured. There is NO general way to calculate it, if you do not know the design strategy of the...
However I fear that Zeiss will/can say that those cheaper products simply arenīt comparable!:(
SCNR
Hmm, just another case of bad Poly reputation!? Given the fact, that Poly Abbe is just 10% less than 1.67 resp. 1.74 Abbe , there should be (almost) no noticeable difference when going to Poly. Why...
Interesting! However, in contrast to Izone claims (which actually never claimed to have extended/automatic focus) this could actually work, especially based on the new, electrically adjustable fluid...
Nope, even if more light passes through (a meager few %), the relation of different colors (what I would call the only reasonable definition of dispersion) remains (almost) the same. Think about...
Hi edKENdanc, despite multiple (manufacturer) claims to the contrary, that AR coats would cause or even reduce additional color fringing (at least in some cases), it cannot override the basic of...
By the way, I have an interesting lens acquired in Germany, but could be made/cloned even in China, that has a circle over the add ("22" = 2.25) over the letters "Ef" temporal and the same circle...
Hi Nikolay, thanks
Sorry, somewhat OT, but interesting news for me, some time ago, when we had a new coating plant installed in our company, I had an interesting discussion with the company...
Hi DCrespo, sorry for my late return to this forum and thread, but I think your statement requires some clarification:
With FF technology you can - in principle - really point-by-point compensate ...
:bbg:I.e. .... We easily could have done this, but we deliberately chose not to, to avoid disturbing any former customers when switching....:bbg::hammer:
Hi, very interesting info. I was wondering, BTW, what is the reason for the "fine structure" of the results, i.e. the multiple "islands" and "bays" in the astigmatism surface? As I assume this is...
IMHO simply because the manufacturing technology for conventional PALs has been optimized so much over the years that the net profit per company expense if huge. Also I would assume that there are...
[QUOTE=WFruit;342880]The Ideal so far is Essilor's ONLY Free Form lens. QUOTE]
But itīs got :confused:"patented Visual Acuity Booster technology":bbg:
Funny!:bbg::nerd::finger:
Obviously you got totally lost, forum-wise! Wrong place to ask!
Iīm pretty much surprised that these guys still exist, they have withdrawn over the time so many of their initial claims how their system works and what it really acchieves. And measurements have...
Ähem, if you really are an optician, you should not rely on such a text either, which is only techno-bable filled with unscientific hype!
"designed for the 21st Centurys Age of Personalized...
This topic has been discussed soooo many times in this forum, I am sure using the search function you will find a lot of detai!l:finger:
Nevertheless, here a a very good page on this stuff bei...
Hmmm, actually that the pupil generally dilates in certain distance range, especially for distant viewing, is totally new to me. I would more likely assume it depends on the "attention" the viewer...
I thought they probably have an independent PAL design software as IIRC Loh has....
I see (more or less), so how does this work "in-praxi", when you make - say - a Shamir Autograph on that...
HI,
I think the previous poster
was referring to the DAC freeform lab equipment, not Shamir!
BTW, interesting website, unfortunatelly couldnīt find almost nothing about their PAL design...
Hmm, first I thought it might be Essilorīs variant of iScription (measuring higher order aberrations of the eye to determine a better regular low-order lens), however, actually, it "only" seems to be...
Hi Graham,
I have to fully agree with AWTECH, IMHO you are confusing things. Your somehow turning the usual "keyhole argument" around to proof just the opposite. This is not a different issue.
...
Sorry if this is not what you expect, but I would assume that there is NO such formula (CANNOT BE), because besides that higher adds will increase overall (unwanted) surface astigmatism as given by...
Yep, however that "newer" MR-8 monomer @ Abbe 42 is usually quoted with a specific gravity of ~ 1.30, 1.22 as Finalite or even 1.20 does make quite a big difference!
Yep, it shouldnīt be ILT, because AFAIK this is Rodenstocks TOP product, in direct competition to the Zeiss Individual or Shamir Autograph etc., not on the cheaper side:cool: