Various cheap alternatives to Trioplan; lenses producing soap bubble bokeh on Nikon D800 and Sony A7

Started Oct 8, 2017 | Discussions thread
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jarek leo
jarek leo Contributing Member • Posts: 967
Various cheap alternatives to Trioplan; lenses producing soap bubble bokeh on Nikon D800 and Sony A7


I wrote a blog entry on triplets with overcorrected spherical aberration producing soap buble bokeh adapted to be used on Nikon D800 or Sony A7:

Here is a summary of the text:

Trioplan: Communist Germany takes revenge after years or triplets with overcorrected spherical aberration

Trioplan 100mm f/2.8, a simple triplet design of East Germany that used to cost just 15 USD ten years ago, suddenly sprang to fame and its prices sky-rocketed to reach 1000 USD levels. And the reason was that someone tried one on a digital camera and liked the out-of-focus areas. Then others called the effect “soap bubble bokeh” and named it the best next thing after sliced bread. The effect, which it truly pronounced only with the lens wide open, comes from simple triplet design with overcorrected spherical aberration. In all truth the effect is just the opposite of what Japanese would call a perfect bokeh, It is the most imperfect bokeh imaginable, if we stick to original notion behind the term.

To each their own; is someone likes the effect and has a spare grand, let them just buy the lens. For those who want to check the effect but would rather not spend that much, there are much cheaper options. The Meyer plant, and then its successor - the Pentacon plant – made slide projectors for 6x6cm format frequently furnished with a Diaplan 100mm f/2.8 (later called Pentacon AV 100mm f/2.8) lens, which is an exact copy of the Trioplan - only without aperture mechanism, which is irrelevant as the effect is visible only at f/2.8. Also shorter-focal length Diaplan/Pentacon AV 80mm f/2,8 projector lenses display similar characteristics. There are other East German camera lenses capable of rendering (in right conditions) soap bubble bokeh, like Primotar 135mm f/3.5, oraz Telemegor 180m f/5.5. Even DC NIkkors of either focal length – 105mm and 135mm – when used in default of their intended purpose, can show some kind of soap bubble bokeh. With ready-made or home-made adapters, all those lenses can be used on either DSLRs or mirrorless cameras. All photos in my blog entry were taken with either Nikon D800 or Sony A7.

 jarek leo's gear list:jarek leo's gear list
Sony a6000 Sony a7R II Nikon D850
Nikon D800 Sony a7
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