John Shriver
Well-known
Let's remember that the Serenar 50/1.9 is a copy of the Leica Summitar 50/2.0. That was Leica's latest 50mm lens at the time the patents were revoked and Canon started copying the designs.
Mechanically, they look close to identical. They are same basic double-gauss optical formula. They have the same constraints of a collapsible lens barrel that makes it rather hard to design such a fast lens. So, I'd expect that they have similar character.
I'd note that testing the 50/1.9 in color could provide different results. The bokeh on my Summitar was totally tame in B&W, but I got some color shots with swirly tangential circular bokeh.
As for the Canon/Serenar 50/3.5, sure, it's old. So is the Summar, and so is the Tessar design it evolved from. But I'm sure it's a fine lens. It does have trouble with balsam separation. It's also rare enough that collector prices render it not a "user" lens.
Mechanically, they look close to identical. They are same basic double-gauss optical formula. They have the same constraints of a collapsible lens barrel that makes it rather hard to design such a fast lens. So, I'd expect that they have similar character.
I'd note that testing the 50/1.9 in color could provide different results. The bokeh on my Summitar was totally tame in B&W, but I got some color shots with swirly tangential circular bokeh.
As for the Canon/Serenar 50/3.5, sure, it's old. So is the Summar, and so is the Tessar design it evolved from. But I'm sure it's a fine lens. It does have trouble with balsam separation. It's also rare enough that collector prices render it not a "user" lens.