Archived posting to the Leica Users Group, 2007/06/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I could be wrong here but doesn't the image appear to be projected onto the film from the rear lens vertex? or is that exit pupil? If so a retrofocus wide angle lens will not project as big an image through the film gate as a symmetrical lens of the same focal length. The gate is only a couple of mm ahead of the film so it won't be that much apart from designs like the hologon. Frank On 8 Jun, 2007, at 08:59, G Hopkinson wrote: > Robert, I follow what you are saying. I'll have to think about > that, I have a suspicion that you may be tampering with some laws of > optics there ;-) > > Coming at it my post below from another direction, always 8 > sprocket holes per frame, consistently much smaller gap between frames > over complete films shot with varying lenses, with the older cameras. > > Today's useless trivia item for film photographers. > Now I'll shut up before someone beats me up with a bag full of > broken digicams. > > Cheers > Hoppy > > -----Original Message----- > Subject: Re: [Leica] 24 x 36mm ? > > If you shoot with a wide-angle lens, the negative image will be > slightly > larger, and the wider the lens, the larger the image gets. The > reason for > this is that the greater angle of the light striking the film with a > wide-angle spreads the light, and thus the image, slightly under > the edges > of the film gate. > > ----- Original Message ----- > >>> From neg samples here, widths of: >> 111c Width 36.84 mm distinctly much tighter spacing >> M3 36.78mm gaps visibly not quite as narrow as 111c >> M6 & M7 35.6mm >> The difference between the three is easily visible at arm's length. I >> might speculate that the standard has altered over the long >> period to allow for ease of handling, for example. Certainly the >> oldest >> camera is extremely precise. >> >> So, on these examples the range is actually more than 3.4% >> >> Cheers >> Hoppy >> -----Original Message----- >> Lew said:<lew1716@optonline.net> >>> I'm just off to my darkroom to confirm something that's been >>> bothering >>> me for a while. The standard 35mm full frame format is supposed >>> to be >>> 24 x 36mm or 1:1.5. This should mean that I can print full frame at >>> 6x9", but (this is the part that's bugging me...) the images from my >>> Leica negatives never quite fit an opening of this size on my easel. >>> The only thing I can think of to explain this is that the Leica negs >>> just aren't exactly 24x36mm. >>> OCD acknowledged, other comments ...?<<<<<<< > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information