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75 Summilux


Paul J

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75 Summilux (1980) is based on 50 Summilux v. II (1961).

The Noctilux f/1.0, if anything, bears the strongest resemblance to the 50 Summilux v.I (1959) and preceding Summarit/Xenon f/1.5 - two thin rear elements.

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(images above from LEICA LENS COMPENDIUM, Erwin Puts, 2001)

In other words, lens design - at least as practiced by Leica - is not necessarily a perfectly-linear progression. Ideas and inspirations get re-used out of chronological order sometimes.

Interestingly, the 50 Nocti f/0.95 has a passing resemblance to the 75 Summilux, especially in the rear groups.

The f/0.95 of course adds (or splits off) one element (the second), and has aspheres, and FLE, and no doubt changes some (or even most) glass types.

In the end they are all modified double-gauss layouts with "extra" elements, at heart.

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  • 1 year later...

M10-D, ISO 400. Heavily cropped. 

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  • 2 weeks later...

MP + Summilux-M 75 + Portra 400

 

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MM

summilux 75

 

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I don’t usually do photos of cats, so here’s one of a new plant growing in my garden. M9, 75mm Summilux

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M10-R with 75mm 1.4 at 1.4

It´s sharp at 1.4 with Liveview, but not with rf. have to send it to leica

 

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  • 9 months later...

M10-D, f/5.6

 

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M10-D, ISO 200

 

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Posted (edited)
2 hours ago, graphlex said:

M10-D, ISO 200

 

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Just wondering, was this shot wide open or stopped down? Also does your copy focus accurately wide open from MFD all the way to infinity? 

 

Edit*  I zoomed in a bit and i assume it’s stopped down because I can see a spec of dust on the sensor.

Edited by 69xchange
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2 hours ago, 69xchange said:

Just wondering, was this shot wide open or stopped down? Also does your copy focus accurately wide open from MFD all the way to infinity? 

 

Edit*  I zoomed in a bit and i assume it’s stopped down because I can see a spec of dust on the sensor.

It was stopped down to around f/5.6.  Not sure by the way that the speck in the lower right isn’t a distant bird.

I haven’t used the 75 Summilux much at infinity, least of all wide open. I’ve done impressionistic ‘testing’ outdoors at f/2 and f/2.8 at 30 to 150 feet, where it does fine. In fact the resolution in that range is really good.

I use this lens mostly for portraits indoors, wide open or stopped down as far as f/4, and there again it seems to focus accurately on my M10-D.  I find the lens too heavy and clunky for a pleasant day hike.

According to Leica lore or myth, the 75mm Summilux was designed by Dr Mandler with NATO requirements in mind, and except at f/1.4, I think it’s meant to be a high-resolving lens, albeit a less contrasty one than current APOs. To achieve that ca. 1980 required a lot of hand workmanship in the grinding and assembly, and perhaps a measure of individualized mechanical improvisation that would be prohibitive today.

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  • 2 weeks later...

Absolutely love this lens. My daughter asked for some shots following her engagement last weekend. She's over the moon with the outcome.

M10-P, 75/1.4 Summilux M

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Could not agree more - my most used lenses - 75 Summilux, 50 Summilux, 35 Summilux (and 80 Lux R) - Here's a recent 75 Summilux shot:

 

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