I had to enlarge low quality photos at auctions to check if that was a Diaplan or not.Ī nice image. Some people sell East German slide projectors not providing information about the lens they are equipped with. Orester has no soap bubbles but is a likable lens. Yes, I agree this boils down to hitting a sweet spot in the kingdom of soap bubbles. And yes, I would not pay $1000 for a lens that has marginal use However I am bit over the hyper-bubble and exploring the cat-eye bokeh at the moment. Now, on Micro 4/3 any lens that is a bit soft and low contrast will perform even worse than on a larger sensor, so often the Diaplan 100/2.8 is kind of meh on that format. I think this is the 3rd image I took after I adapted the Domiplan
SOAP BUBBLE BOKEH LENS MANUAL
It is actually the Domiplan that started my fetish for vintage lenses (my very fist manual focus lens on digital) and if it wasn't for those bubbles maybe my initial excitement would have not been there and I could have taken a different path. (another member of this forum who is very good at making hs own adapters. Had to give everyone else a chance - did not want to corner the market. ĭiaplan not so rare - I passed on the lot of 100 units and also on the 50 unit batch But it is a capable lens if a little Despite having a few bubble-bokeh lenses in my collection I am not that much good at provoking them - must try harder. The Bonotar 105/4.5 from Feinmess may also be another candidate but might not be fast enough. Also the shorter focal length Trioplan from Meyer which is also on the expensive side. Some have suggested the Meyer Domiplan as well.
Maybe the Diaplan "stock price" will soar now that the secret is out. I have noted your Diaplan recommendation and will check it out. I find that their apertures tend to stick even with the re-design and reduction to six blades. I suggest that "easy bubbles" are a factor of focal length and size of aperture and presumably the Meyer Trioplan 100/2.8 may have just hit that sweet spot.įrankly I prefer the early multi-blade Orester 100/2.8 - seet little lens but maybe no "bubbles" to speak of - I think that was one lens that did not improve the breed as it became older. The cheapest way is truly the Diaplan - I paid 15 USD for a slide projector with the Diaplan. It is not easy to adapt but such adaptation is doable at home. I think I paid close to 40 USD for it with AltiX camera. I have Trioplan 50mm and it does produce some bubbles.
All photos in my blog entry were taken with either Nikon D800 or Sony A7. With ready-made or home-made adapters, all those lenses can be used on either DSLRs or mirrorless cameras. 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. 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. Also shorter-focal length Diaplan/Pentacon AV 80mm f/2,8 projector lenses display similar characteristics. The Meyer plant, and then its successor - the Pentacon plant – made slide projectors for 6圆cm 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. For those who want to check the effect but would rather not spend that much, there are much cheaper options. To each their own is someone likes the effect and has a spare grand, let them just buy the lens. 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. The effect, which it truly pronounced only with the lens wide open, comes from simple triplet design with overcorrected spherical aberration. Then others called the effect “soap bubble bokeh” and named it the best next thing after sliced bread. And the reason was that someone tried one on a digital camera and liked the out-of-focus areas.
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. Trioplan: Communist Germany takes revenge after years or triplets with overcorrected spherical aberration
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:
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