Thank you, Rik! So I have to add some more details! :D The technique is very simple: take a glass jar full of warm (or hot) water, put one drop of essential oil, adjust lighting... and observe! :shock: 1. I've found that oils of conifers (pine, fir, juniper etc.) behave better. Although citrus oils ...

A few years ago, I proposed another object for similar interference images: thin layers of essential oils on the water. They live longer and are easier to obtain. I spent many hours (and even days) experimenting with different oils for aromatherapy taken from the nearest pharmacy. It was very exciti...

... The tubes are smooth without ridges so the clamps can slide along the entire tube set. I haven't found these tubes elsewhere, so suspect these are custom tubes machined for Wemacro, as are the nice wide clamps. I have found similar smooth tubes (45 mm diameter and length, with T2 = M42x0.75 thr...

Dear Philip, We've bought one LOMO POLAM-L213M microscope recently for our lab (as a good inexpensive workhorse) and I'm seeking solutions now how to attach mirrorless camera to its trinocular output (with image covering full APS-C sensor). This objective (PLAN 2.5/0.05 P) is included in the standar...