Archived posting to the Leica Users Group, 2003/09/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Dear BR, your idea is very interesting. Before I studied in more details the CMOS technology of Fill Factory, that claims very large angular tolerance (for this, go and have a look to their website: http://www.fillfactory.com/htm/applications/htm/high_resolution.htm , and by the way, check also the LEAF C-MOST cmos they produced for CREO society, isn't it thin enough to go in the film guide of a Leica-M? Nice, no?), I was thinking of a special Microlens Array (a special layer put in front of the CCD in order to enlarge the quantity of recieved light) in which the microlenses were displaced to re-collimate the light on the photosite (So, the microlens of each pixel had to be shifted in the direction of the center of picture, nearly nul in the center, biggest shift in the corner). I was also thinking of some sort of Microlens array combined with a microfresnel or catadioptric layer, that angled the light just before hitting the photodiodes (everybody knows the effect of this, look at a rolleiflex screen form 50', and a current accumate screen, that's suppression of light incidence defect, no?). I don't know though if such a device could accept every angles coming from all leica-M lenses present and past. Such microlens array- microfresnel array can be done with present technology ( http://www.canyonmaterials.com/technology.html , I invite you also to check this one) best now, Dear BD, I would like to explain my aims here, as your critics are quite direct. I recognize first I can't help this, I'm always thinking about this DigiBack, and some time, I cannot sleep because of technical details I encounter in my reflexions, so, maybe it's related to phantasm. But, I disagree on the point it is useless. If one never stops to say it's impossible, mainly because the incidence angle of the light problem, for sure, we'll never see this done in our life. So I bid on the fact technology will advance more and more quickly, and if today, the sensor doen't exist, be sure tomorrow it will. It isn't useless to think about this, to show ther is an interest to Leica, even they don't listen, rely on me to email them my webpage link, I already discuss the thing with one of their engineers. It's also interesting to think of ways to inplement this, to have an idea of what can be done, what cannot. For example, I you read the last page I added about interface between body and digiback, you would understand for example why an auto ISO mode will not be possible with the Leica-M without having the body too much modified (though this could lead to electronic shutter speed of whatever you want, 1/4000, 1/8000 with your Leica-M, or in Bulb mode, the digiback could take multiple pictures at let say 4i/s) I rejected this to maintain the M philosophy of the system. In the end, this is also useful to show you this, in order to know what other leica users think of it (I try to make a form about that on the webpage, so to have some stat data). and as far as I remeber, I never dreamed of jets and race cars when I was boy, rather well skies and mounts, lakes and flowers, wilderness maybe. and to be complete drawing was done under powerpoint in full scale, but I'm not proud of this, I would prefer Autocad. Best also after that, Best Mock, Your scripturals are always quite sibylline though poetic for me, but I always feel some kindness and positive mind in, but maybe this is due to my poor understanding of your puns. I fear maybe this is humour about some misused expressions on my webpage, if this is the case, please don't hesitate, tell me directly that there is another word more accurate for trigger half-depressed or things like that. I will be delighted to improve myself on this point. Best too JB, thanks for recognizing I'm thinking about this ;-) Best Grégoire Vandenschrick - ----- Original Message ----- From: <Afterswift@aol.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Sunday, September 21, 2003 6:37 PM Subject: Re: [Leica] Re: Re: DigiBack webpage updated > > In a message dated 9/21/03 2:04:05 AM, telyt@earthlink.net writes: > > << No doubt you (br) have solved the engineering issues regarding the > differing > angles of incidence of each lens at each focussing distance which BTW is not > communicated to the camera body by the existing lenses. >> > > If engineering has anything to do with common sense, then we all can make > suggestions. Perhaps that's how the wheel was invented. The original wheelwrights > probably got the idea from some farmer who made the connection between a > round rock rolling down a hill and a wheel he could attach to a pallet of grain. > Entire pre-Columbian civilizations in SA never made that connection. > > We could conceive of diamond-shaped sensors that could receive rays from any > angle. I've no doubt that engineers are working on the problem. > > br > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > - --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.520 / Virus Database: 318 - Release Date: 19/09/2003 - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html