My friend's dog Jana, a joyful Havanese. Photo with blue KB20 and green Rollei filter stack allowing the capture of plants in pink without channel swap. In LR some color and temperature tweaking.
Hi. Here's analysis of 6500K daylight CFL lamps (plus one LED intruder) in infrared by using a stack of 720nm cutoff filter and diffraction filter on a full spectrum converted camera. Fluorescent lamps work through mercury vapor discharge in UV which excites fluorescent phosphors that glow in visible light (plus also mixing directly emitted mercury visible lines). Thing is mercury emission will be only initiated in presence of buffer gas. This may differ between particular types of fluorescent lamps but in case of small self ballasted lamps like it is most often argon. In near-IR region mercury doesn't radiate at all but instead argon radiation can be clearly seen. This overlaps with phosphor emissions. The curious thing is argon most strongly is glowing near electrodes while phosphor emission encompasses whole length of discharge tube so it's possible to separate the two through looking at the shape of spectral image, argon is point dots at bottom while phosphor is elongated shape. There is a >1000nm phosphor emission which surprised me as literature on fluorescent materials used in lamps is sparse in data of infrared emissions. In my opinion it is Yttrium Oxide Y2O3:Eu2+ phosphor which in visible part is the red component but would be happy to get confirmation. Scale was made based on known in literature argon emissions.
Monument of Antoni Abraham, Kashubian activist and popular writer, located in Gdynia city, capture with full spectrum Canon, Mir-1V M42 lens and filter stack of B+W KB20 Blue filter and Carl Zeiss Rollei Green filter (made for Rolleiflex cameras and filter has etched Grün which is German word for Green, spectrally it should be Hoya X0 equivalent).
Recent work showing old stuff from railways in Poland. Photos include SM42 and SU42 locomotives still hauling double-decker sets to popular tourist destination. Other photos show various normal gauge and narrow gauge stuff related to Gniezno depot.
Abandoned resort in Orłowo district in Gdynia, engulfed by forest, accompanied by other maintained buildings and fishermen boats. Shot with KB20 filter, custom WB, no swap, adjusted in Lightroom. The KB20 was stacked with circular polariser to control luminance of blue sky in camera.
Here's a 2024 photo in analog format done with legendary Zenit camera, Tokina made in Japan M42 lens, Hoya 720nm filter and Rollei superpanchromatic 35mm film sensitive both to visible light and infrared.
Hi! Here's photo from the tip of Hel Peninsula done with full spectrum Canon together with Mir-1V 37mm manual lens through M42-EF adapter (in my opinion old lenses are often great performers in IR photography) and 610nm red filter. Enjoy!
Photo of awesomely illuminated escalator tube connecting surface with M2 metro line in Warsaw.
Photos from Night of Museums event which included opening a tram depot to public and preparing an exposition of old trams. Most pictured trams were made between 1908 and 1959 (with just one exception from 1990). Exterior shots done with lens fully opened and times around 1/10s.