The Leica "Glow"....any pics!

The term "Leica Glow" has been the most overused and undefined optical term over the last 20 years.
If you can provide a definition in terms of optical qualities, I can probably find a lens that produces it. I have a lot of lenses.
For the "traditional use" of the term, anything made after the Summarit 5cm F1.5 and Type 1 Rigid/Dual-Range Summicron 5cm F2 have lost it.

Thanks Brian.
 
Yup, my Summilux 35/1.4 pre-asph was “glowing” wide open which is also the case for most older fast lenses at full aperture of any brand.
 
Flare or glow it is just a defect. But for those who can’t produce content, special d-effects is blessing.

Here is a link to marketing promotion and defects. Rather than post the image here in a degraded version view it on Flickr. Yes, the lens is wide open at f/2.0 and also the shutter at 1/12 of a second. The light is very nice with a glow/defect while the image details are in focus. Nice trick for marketing and the lens designers use of defects. https://flic.kr/p/2nPv5bQ
 
Digital Fuji folks claim the Fuji X 35mm 1.4 lens is "magic"
Is that the same?
Or different, if so, how?
My experience with it shows lovely bokeh at 1.4 in OOF backgrounds, particularly when backlit. But then, that's usually going to look good with other lenses, too.
 
both with lux 35 v2

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These are with my Summar, very clean glass. I also refinished the inner surfaces of the elements that the paint had flaked off of.
This cut way down on the flare. On my m Monochrom. Second shot- Sun in the corner.

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Like it, don't like it- one of the few lenses that flares like this.
 
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From an article that I am writing- included this comparison of the Leitz 5cm F1.5 Xenon and my 1934 5cm F1.5 Sonnar, converted to Leica Mount.
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The Xenon is far better than the reputation would have you believe. The Sonnar- always amazes me. Glass on both is near perfect, both have a beautiful bloom. The Summar, Summitar, Xenon, Summarit, Summicron collapsible and Type 1 Rigid: These are the lenses that the term "Leica Glow" originated with, before the move to higher contrast when the Japanese lenses became so popular.
 
I think there was a Star Trek Episode where Kirk and Harry Mudd explain to Norman the Android exactly how to achieve Leica Glow, stating that it can only be recorded using B&W film using a Barnack Leica and thread-mount lens.



Harry just told him exactly what produces Leica Glow.

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Leica Summarit 5cm F1.5, wide-open. Probably on the Canon 7. Harry was lying about the Barnack Leica part. Nikki just out of Children's Hospital after more surgery than anyone should go through in a lifetime. High doses of Prednisone, wears off in a few weeks. She liked wearing the RN uniform at the hospital.
 
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The traditional term meant the trade-off between contrast and resolution that Leica engineers chose when designing lenses. Leica lenses favored absolute resolution over contrast, making for lower-contrast images with very high detail, This "Look" fell out of favor in the 1960s with many of the new optics from Japan, and Leica designs such as the second version Rigid Summicron 50/2 of the 1960s reflected the more popular look. The "Glow" was diminished.
To me, that is what makes some older Leica lenses very interesting to shoot with. In certain occasions, when the light is right, certain legacy Leica lenses give an almost crystalline rendition, which is no doubt down to moderate contrast and high rez. Highlight bloom I can live without.

I think the best exemplars of that sort of thing are the photos of Dr. Paul Wollf, an early Leica photographer.
 
These are with my Summar, very clean glass. I also refinished the inner surfaces of the elements that the paint had flaked off of.
This cut way down on the flare. On my m Monochrom. Second shot- Sun in the corner.

View attachment 4815345View attachment 4815346

Like it, don't like it- one of the few lenses that flares like this.
Very cool flare how many aperture blades does your Summar have?
 
Very cool flare how many aperture blades does your Summar have?
All Summars, the Xenon, and some Summitars use a Hex shape aperture, the Summar uses a double set of blades.
I believe this was to reduce focus shift caused by spherical aberration. The Xenon that I own is optimized for wide-open use, the Summarit is optimized for between F2 and F2.8.

The fast Leica lenses have very little chromatic aberration. The IR focus index is within the F2 DOF. Lenses from other makers have it between F4 and F8.
 
The traditional term meant the trade-off between contrast and resolution that Leica engineers chose when designing lenses. Leica lenses favored absolute resolution over contrast, making for lower-contrast images with very high detail, This "Look" fell out of favor in the 1960s with many of the new optics from Japan…
At a normal viewing distance sometimes I’ll see a photograph that looks very sharp and detailed, but on closer inspection it is not as sharp as I thought, it doesn’t have the resolution I thought. I’ve also seen high resolution low contrast images. What I don’t understand is why a higher contrast image doesn’t have the same or higher resolution. Is it that fine grain detail is lost when the exposure produces higher contrast - that fewer grains contribute to the resolution? What about digital - can contrast be increased without losing resolution?
 
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