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Whenever I come across with some reports or impressions on old lenses especially made by Ernst Leitz Solms GMBh, I mourn and lament. The condition of object are not always well settled and maintained, they were not estimated their original and innate capability and potentials.
Mold and dust particles causing cloudiness and peeling of the edge lacquer can lead to poor image quality and the occurrence of flare and ghosting.
Consequently, we should restore them as original condition if we try to know their potentials fairly, of course the best care must be paied especially not to wipe out delicat and sbtle coating layer---difficult for layman.
The subtle differences in spherical aberration correction should be discussed under fair and correct establishment of any conditions. It is not an area that amateurs can easily enter.

Cold air pressure comes down from the Western Continent and cold weather are lasting in our country these days. On frozen road surface must be paid attention. Once start to slip all the vehicle fall into uncontrol.

My photo shooting hobby is inhibited this coldest season. Newly obtained equipment, Elmar 90mm/f4.0-Black lacquer painted no coating, Summitar 50mm/f2.0-square iris shape and M Rokkor 40mm/f2.0-similar with Summicron M 40mm/f2.0.

When it get warmer and the flowers bloom, things get busy.

Raised edge on edge painting causes reduction of resolution especially in lower frequency. Half a century after its production might such a change over time. Silver circle is observed the phenomena, just removing original painting without hesitation however looked no problem. New black painting will show you apparent improvement in image quality especially when iris is fully opened. Then a bad reputation because of Whitening image would be thoroughly wiped out as a matter of fact.

The existing old media, dominated by dirty money, will be driven out and wiped away by the new wave formed by the newly developed web. The distorted truth can no longer win, and in an instant, the disguise of a lie is exposed as the truth. No matter how many times a lie is announced so repeatedly, it will never turn into the truth. Not the difference of the way of expression nor that in how to receive, the Truth and the Fact are not movable.
We Japanese people are not intentionally taught modern history, but here too there is an intention of foreign powers. It is not too late to start learning. Looking back at the past from the current situation, it is easy to understand the connection between the present and the past. We can see how we have been oppressed and exploited. It is well hidden and camouflaged as nothing.
When you watch variety shows that are easy on the brain, you will be brainwashed and become stupid without realizing it. Just stop it!
Unconscious brainwashing by instantaneous insertion images, so to speak Subliminal stimuli. Prayers, spells and hypnosis are no longer effective in the age of science.
It is important to gather information and make your own judgments. Money cannot turn a lie into a false truth. The Japanese have finally gone from being junior high school students to adults. They have grown smart and wise. We will no longer have our emotions manipulated by boring foreigners, whether East or West.
Strange and primitive religions will also disappear from our country.
You have to decide yourself by yourself, for yourself and on yourself.
The time has come to establish ourselves without relying on external forces as before.
The right of self-determination is a priority for every nation.

Ernst Leitz Wetzlar Summitar 50mm/f2.0 and Elmar 90mm/f4.0 are the tool I would like to use for shooting on Nikon Z8 for the time being. Former has angled illis window and latter does no or slight coating on every glass element. Both of them have L39 screw mounting flange.

Summitar is a predecessor of famous Summicron because of its extraordinary performance in resolution. Less power of resolving is more moderate edge drawing leading to gentle line. More softer pics would be obtained as a matter of fact, probably because of residual Spherical aberration. Consequently, I dare chose Summitar than commonly prevailing one, both of them are designed similar with Gaussian symmetric with the iris brade between, also the fuselage construction with retractable are the same, so it's difficult to tell which is from a distance. The way of atmospheric resolutions are different each other, this is not a title which is the sharper.

As for Elmar 90mm/f4.0, earlier model, black painted, no coating and a bit heavier because of brass fuselage construction, has tasty character.

Triplet design invited this Elmar has les inconvenient reflecting surfaces, 6 in total leading to more transparent resolution. I know that recent lenses are produced with multi-coating and more lens element to eliminate abberasins also aspherical element application. And eye-openingly clear and brilliant pictures are common especially corners.

Complicated lens designing requires so sophisticated machining technology, lens element it self, lens case also does and increasing reflection surfaces also coating surfaces inviting resorption of light source, establishing the centricity of every element, precise matching and fitting between lens element and its case. Product quality must be checked so carefully on the way of production.

From this point very selfish and self-contented opinion would be described, I feel that something is lost in the pics taken by such a recent lens designing---something important that should not be lost. It's a very difficult task to explain it in word, resolution of atmosphere, smell of air or temp and moisture, very small sound that is difficult to be discerned at that time. This tendency is discerned when monochrome method is invited for the works. This is why I prefer old less lens element design to new and modern computer done ones.

All the ancient lenses take good pics also newer ones, my opinion is just depending on the comfort level of ones Hobby.

Trifle is nothing but piled ones are not so but great.

The joy of life lies in noticing small, little and tiny things?