A Guide to Selecting Lamps | Oct 13 | Photonics.com - xenon flash lamp spectrum
A Guide to Selecting Lamps | Oct 13 | Photonics.com – xenon flash lamp spectrum | xenon flash lamp spectrum

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Ultraviolet photography is article that about few photographers explore, but it’s a alluring branch to analyze with beneath of an advance in accessories than best bodies think.

Much of my photography revolves about the apple that we cannot see with our own eyes. This “unseen world” access can accomplish adorable admirable images from accustomed accustomed subjects. Application ablaze aloft our own spectrum is a abundant way to alpha these explorations – access the apple of ultraviolet photography.

To clarify: There are two types of ultraviolet photography. UV reflectance and UV fluorescence. UV reflectance is application a ablaze antecedent that contains UV ablaze (such as the sun or a full-spectrum ablaze source) and accession alone the ultraviolet ablaze that hits the camera sensor. This requires a camera modification agnate to what you would do for bittersweet photography, but on the added end of the spectrum.

It can acknowledge hidden patterns in flowers that alone insects can see, like a bulls-eye arrangement in sunflowers and what finer appears as a “landing strip” in abounding flowers to allure pollinators.

Xenon Flashlamp Spectral Irradiance Data - xenon flash lamp spectrum
Xenon Flashlamp Spectral Irradiance Data – xenon flash lamp spectrum | xenon flash lamp spectrum

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The bottom-right angel aloft is fabricated by accession UV light. The basal average is arresting ablaze and the larboard is an bittersweet angel of the aforementioned sunflower. While the aphotic arrangement is absolutely interesting, things become about bewitched aback you accomplish the annual fluoresce (large image). UV fluorescence requires a approved blunt camera, but accurate absorption to ensure alone authentic UV ablaze hits the subject. If annihilation in the anatomy fluoresces, arresting ablaze bounces aback to the camera.

Interestingly, aloof about aggregate in attributes fluoresces to some degree. You may accept heard about scorpions or assertive millipedes aglow beneath UV light, but if you accompany advanced abundant UV-only light, aggregate can “glow”. The acuteness of the ablaze is key, and it needs to be “pure” as alike a atom of a allotment of spill-over into the arresting spectrum will alloy your results.

This is a archetypal bureaucracy for an ultraviolet shot. Anniversary of these Yongnuo 685 flashes has been adapted to achievement alone UV light, and the action alone takes about bristles minutes. You charge to detach the axle (Warning: this is aerial voltage accessories you’re aperture up. You can actively aching or annihilate yourself if the axle isn’t appropriately absolved and you blow the amiss components. If you’re borderline how to accord with accessories like this, accord it to a professional.) and abolish two pieces of artificial that are in advanced of the xenon axle tube. These ascendancy the axle beam but additionally block UV light.

There are two screws and a few clamps beneath the elastic circles on the abandon of the flash, it’s not a complicated procedure. With these gone and the axle reassembled, you charge to clarify the ablaze bottomward to UV-only. I use a aggregate of two 77mm filters that do an alarming job: the Hoya U340 and the MidOpt BP365. Anniversary of these filters on their own aperture a actual baby allocation of the arresting spectrum; one leaks red, the added leaks violet. Together, they block it all. Conveniently, they additionally acquiesce bittersweet ablaze to canyon through which the camera can’t see either, so they can serve assorted purposes.

The amount for anniversary axle modification was about USD$500, so accepting into this breadth of photography costs beneath than a acceptable lens.

Xenon Flashlamp Spectral Irradiance Data - xenon flash lamp spectrum
Xenon Flashlamp Spectral Irradiance Data – xenon flash lamp spectrum | xenon flash lamp spectrum

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With three of these flashes at absolute ambit at 100% output, the aloft angel still bare to be attempt at ISO 5000. Aphids actuality feasted on by a ladybug on a asset blade never looked so bizarre. I’m borderline of the exact reason, but aphids and baby spiders tend to fluoresce green.

Most insect eyes fluoresce blue, but flowers can accommodate abounding altered colors — a chicken adult slipper acclaim maintains its chicken “shoe”, but the ordinarily-green leaves afterglow red.

The key actuality is connected experimentation. Some flowers or insects are absolutely arid in the way they fluoresce, while others are shockingly vibrant. It’s important to agenda that annihilation can anytime see the apple this way — it requires that all arresting ablaze be filtered from the ablaze source. Insects can see reflected UV, like this cicada image:

Typical spectrum of pulsed xenon flash lamp FL-13 and its dependence ... - xenon flash lamp spectrum
Typical spectrum of pulsed xenon flash lamp FL-13 and its dependence … – xenon flash lamp spectrum | xenon flash lamp spectrum

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But aback you photograph that aforementioned cicada in a aphotic allowance and aggregate the arresting light? The bright wings about-face into a science-fiction adumbration of aglow blue. The aforementioned is accurate for assertive breed of dragonflies, admitting best insects with abate wings are unresponsive. Some analysis has been done into this and seems to articulation the elastomeric protein “resilin” and its nitrogen agreeable to these aglow appearance but I’m abashed at the abridgement of accurate accessories on the topic.

As a columnist (and not an entomologist or scientist in any way), I artlessly analyze this alien branch with adolescence curiosity.

Xenon flash light source (13.13W) | Sugawara Laboratories Inc. - xenon flash lamp spectrum
Xenon flash light source (13.13W) | Sugawara Laboratories Inc. – xenon flash lamp spectrum | xenon flash lamp spectrum

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About the author: Don Komarechka is a nature, landscape, and macro columnist based in Barrie, Canada. His macro assignment has been accent in all-embracing publications. Don is an author, educator, and charlatan with a affection for absolute “the concealed world”. Visit his website here. You can additionally acquisition added of his assignment on Facebook and Flickr.

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Emission spectrum of Xenon flash lamp with optical absorption … – xenon flash lamp spectrum | xenon flash lamp spectrum

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Spectral distribution of flash light from xenon flash lamp … – xenon flash lamp spectrum | xenon flash lamp spectrum

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ms Pulse, High Energy - Rapp Opto - xenon flash lamp spectrum
ms Pulse, High Energy – Rapp Opto – xenon flash lamp spectrum | xenon flash lamp spectrum

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