
In a hands-on examination, GSMArena discovered a technical detail Samsung didn't highlight in its marketing: the Galaxy S26 Ultra's 5x telephoto uses a traditional lens design — where lens elements and sensor are parallel to the phone's back — rather than the periscope lens from the S25 Ultra, which uses a prism to bend light 90 degrees.
A periscope design lets phones achieve long focal lengths (5x, 10x zoom and beyond) without increasing body thickness — by redirecting light horizontally through a prism rather than straight through a conventional lens stack. It became the standard approach for flagship telephoto cameras.
The S25 Ultra used a periscope lens at a 111mm focal length — the standard approach at this zoom range. The S26 Ultra replaces this with a traditional lens design where elements and sensor sit on a straight optical axis parallel to the phone.
Rounder, More Pleasing Bokeh: Periscope lenses produce rectangular bokeh shapes in background blur, which is less aesthetically pleasing. Traditional lenses produce round bokeh in the center that gradually shifts toward the edges — a more attractive result for portrait and close-up photography.
Wider Aperture: The new f/2.9 aperture vs. f/3.4 on the S25 Ultra theoretically lets in 38% more light — beneficial for low-light telephoto shots and detail retention.
Minimum Focusing Distance — The Key Trade-Off: The circular lens opening is more compact and better suited for thinner phones, but comes with a trade-off: the minimum focusing distance has increased, meaning the phone cannot focus on subjects as close as the S25 Ultra's periscope unit could.
In practical terms: detailed close-up telephoto shots — food photography, coins, insects, product detail — become harder to achieve with the S26 Ultra.
If you only use telephoto for distant subjects, this may actually be an upgrade: better bokeh and a wider aperture. If you relied on the telephoto for close-up and detail photography, this is a tangible downgrade. Notably, Samsung's official S26 Ultra page contains no mention of "periscope" — while the S25 Ultra page referenced it explicitly.
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