Archived posting to the Leica Users Group, 2003/07/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Felix, Thanks for your response. I was curious as it reminded me of the original Hologon for the Zeiss Contarex. From time to time the French has come up with some interesting optics...this is apparently not one of them. Thanks, David On Sunday, July 20, 2003, at 01:04 PM, Felix Lopez de Maturana wrote: > >> I just checked out the Alpa web site and found this reference; >> >> http://lux.technologies.free.fr/Pano%20en.htm >> >> Does anyone have any experience with this 15mm f/22 lens in a Leica or >> other 39mm mount camera? >> >> I suspect the price may be on the stratospheric level. Maybe Rich >> Pinto knows ( Rich?). >> >> David > > David > > This lens, in fact a 15mm f:11 a perspective orthoscpic and with an 110 > angle of view is produced by Lux Technologies a busines specialized in > thermocolormeters, and it hasn`t diaphragm nor focusing knob; it's a > fixfocus whose design is made with two tiny elements and with a weight > of 65 grams. It's, as I mentioned, a f:11 but a T/22 of photometric > value. > > A trick is made for avoiding vignetting: micropoints on the lens create > a dregraded similar to the Xpan filters, limiting the ammount of light > crossing the center zone of the lens; otherwise the vignetting woud > have > been two diaphragms. This explain the T/22 value.Distortion not bigger > than 0,4%. Contrast average and sharpness is very truly modest. > > Three years ago his price was over 800 € (US $880 I believe). I, by > far, > prefer and own a CV Heliar 12mm f:5.6 or, better, a Hologon 15mm f:8 > (On > my G2 camera) > > Felix > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html