Talk:Lens (optics)
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Hey folks, I must say this is the most understandable and concise page, that I know of, dealing with this subject matter. keep up the good work. Could you add a piece on how lenses are made? What equipment, processes, etc.? How large or small can they be made? How accurately can they be machined at such large and small dimensions? [User Randall Meyer]06 12 06
Who feel to write something about photographic lenses ?
Would it not be an idea to split this large article? The chapter on optical aberration would be a good candicate User:Egil
- I considered splitting off the aberration section before, but that would really require merging it with the aberration in optical systems article. That article is very dense and hard to read (being copied from the 1911 EB), so it'd be a lot of work.
- As it stands, I don't think the current article is too long, and the aberration section is limited in scope to a single lens, which makes it fine in my opinion. It's also only a qualitative description of aberration, I think a quantitative treatment should reside in a seperate article. -- DrBob 17:45 Jan 24, 2003 (UTC)
Fine with me. I've put a link from aberration to lens. Wrt. the to do items, I've left them as unterminated links. So if you later feel for putting them into the lens article, then it would just be a matter of deleting the links.
PS: How do you add your name and the date to your answers? I assume it is automatic?
Argh, someone moving the article to lens (optics) means everything that links to the primary meaning of lens now goes through a redirect. Can someone move it back? I can't, because lens has a history and I'm not a sysop. -- DrBob 17:08, 5 Mar 2004 (UTC)
Oops - I am the guilty party - and I;m sorry. But I do think there is a good case for not treating the optical-instrument type of lens as the primary meaning. Willing to fix all the links manually - but only if there is agreement on how best to do it. Sorry for causing mess and hassle, but maybe it is time to make a change. -- Hugh2414 22:31, 7 Mar 2004 (UTC)
- To me lens (optics) seems just fine. Lens has to many meanings for the previous arrangement. The primary lens page should be the disambiguation page though, i.e. no need for lens (disambiguation) IMHO. -- Egil 23:27, 7 Mar 2004 (UTC)
- PS: But all the links must be fixed, there are now a number of double redirects! I assume the person doing the rename will also fix the links!
I have copied the contents of lens (disambiguation) into lens. Next step would be to fix all the links to lens to point (most of) them at lens (optics), and then get lens (disambiguation) deleted. I'll happily go ahead on a link-fixing spree. Just waiting to hear from DrBob -- Hugh2414 09:28, 8 Mar 2004 (UTC)
- Sure, I'm probably biased towards the optical meaning, so leave the page at lens (optics) since that seems to be the consensus. You can use the "what links here" page to see which links need to be updated. Thanks. -- DrBob 15:53, 8 Mar 2004 (UTC)
Should one include Cartesian sign conventions in the part after the thin lens fourmula -- which states that when the distance of the image from the optical centre should be taken as positive and when the same should be taken as negative? -- Guest
I think, after checking, that the lensmaker's equation when d is small is 1/f=(n-1)(1/R1+1/R2)
the change: plus instead of minus between the radiuses