Are Exposure Lights Worth It
While it’s completely possible to shoot digital cameras without a handheld meter, they do seem to be back in fashion lately. They provide quick and easy consistency between shots, or completely different lighting setups and environments. They help you get setup and ready to shoot before your subject’s even arrived at the studio or location. They’re also very handy for street photography, too.
There’s a lot of options out there, and plenty of digital ones for all budgets. You could go with an old used digital Minolta. Or even something fancy and expensive like the Sekonic L758DR or L478DR. The least expensive meters today tend to be the very old analogue light meters. You can often find them in the used sections of local camera stores and auction sites. But how do you actually use them?
This video from YouTuber Mind Splurge was uploaded a few months ago. Recently, though, it seems to have been discovered and post around Facebook and various forums. In it, we’re shown exactly how these old meters work. And they can still apply them to your modern digital photography.
Exposure make great lights that not only allow you to run while charging, but also have the ability to transfer power from one light to another over an umbilical cord. But then there’s the lack of smart features and the ability to mount them on the out front mount. The perfect light whatever your pursuit! Contact Us Ultimate Sports Engineering Ltd Unit 4 Bury Mill Farm Bury West Sussex RH20 1NN info@use.group +44 (0)1798 839300 Service Warranty. Like all Exposure lights, the Six Pack is an all-in-one design, which means the lamp and battery are contained in a single barrel-shaped body. There are no flapping cables or frame-mounting issues and everything is kept together for charging and storage.
With little information about them available on the web, Mr Splurge sought the advice of his grandfather. His grandfather was also a photographer. So, he explained all about how it all works. Then Mind Splurge put this video together to explain it to the rest of us.
The first step is to set the ISO (or ASA – it’s basically another label for the same thing). In this case, ASA 100. Then, depending on whether it’s sunny or cloudy, you rotate the dial over to the appropriately coloured mark. Blue represented sunny conditions, while red was for cloudy or dimly lit environments.
Are Exposure Lights Worth It Lyrics
The indicators on the bottom of the two dials give us the shutter speed and aperture combinations we can shoot at to get a good exposure. With film, it was easy enough to just round up. For example, in the image above, you can see that the shutter speed marker goes a little past each aperture mark.
In the above example, for a shutter speed of 1/500th of a second, it recommends an aperture about a quarter to a third of a stop darker than f/4. So, around f/4.5. On negative film, however, you could happily shoot away at f/4 and ensure a decent shot as it has very good highlight preserving qualities. On digital, it might still take a test shot or two to get things perfect, but it gives you a great starting figure.
Even with modern digital light meters, the results provided aren’t perfect right out of the box for every digital camera. But they out with consistency on a given camera, regardless of the exposure. So, you’ll want to figure out how far out your meter is from what your camera’s sensor picks up, in order to be able to quickly compensate in the future.
I know on my old Nikon D300s, for example, I have to underexpose my Sekonic L718 by about 2/3rds of a stop to get a good exposure. On one of my Canon bodies, I have to overexpose my meter by 1/3rd of a stop to get the same result. All my other digital cameras are somewhere in between those two extremes. With film, it’s spot on every time.
Anyway, if you’ve been thinking about picking up a light meter, but don’t want to fork over the cash for a modern digital one, these can do the job. So, if you’ve seen one laying around on the shelves of your local camera store looking for a new home, it may be worth picking.
Do you still use a light meter for your photography? All of it or just some of it? Where do you find they help you the most? Or do you just use your camera’s built in reflective meter? Have you wanted to get a light meter, but don’t know where to begin? Let us know in the comments.
Air purifiers are an excellent tool for eliminating indoor odors and reducing allergens. Simply put, an air filter captures pollutants and expels clean air, much like a tree absorbs carbon dioxide and releases oxygen. However, just like trees, the types of filters are legion. Carbon prefilters capture hair and some odors; volatile organic compound (VOC) filters trap odors and airborne pathogens; and HEPA filters reduce indoor allergens such as dust and pollen.
However, air filters are only the tip of the purification iceberg. Some air purifiers use ionizers and UV light, but you may not know what these technologies actually do. This article will give you simplified explanations and warn you about the potential dangers of both. We do not want to scare you away from air purifiers that use ionizers and UV lights, but we do want you to understand the risks and be careful when you use them.
Ionizers
Many of the air purifiers that we reviewed include an optional ionizer. In fact, some of our favorite purifiers use ionizers to increase the cleaning power. But what does this technology do? Without confusing you with too much chemistry, oxygen is a neutral element that loves to change its charge. An ionizer uses an electromagnetic charge to add or remove electrons from oxygen atoms, making the oxygen particles either positively or negatively charged as they leave the ionizer.
Are Exposure Lights Worth It Good
Ionized particles are far more common in the upper atmosphere, and the air we breathe tends to combine oxygen molecules with several other elements. In theory, after the oxygen passes through the air filter, it detaches from other particles and looks for a new particle to bond with. The ionizer gives the outgoing air an electromagnetic charge so that it will bond with other particles more easily. Then, when the charged ion passes through the air filter a second time, it is easier to capture.
The potential danger with this is that humans don't usually breathe ionized air, and many studies show that electromagnetically charged particles can damage lungs. Also, if an oxygen molecule bonds with two others, it becomes O3, or ozone. Ozone can irritate airways and exacerbate breathing-related problems.
The best way to use an ionizer is with an operation scheduler or timer. This way, you can run your air purifier and ionizer while you are out of the house. Then, the charged particles will bond with other compounds without damaging your lungs. However, if you are sensitive to ozone, you should avoid ionizers entirely.
UV Lights
When an air purifier uses a UV light, it promises to eliminate airborne pathogens. Many point to the UV light hospitals use to purify equipment. In theory, ultraviolet rays will kill the microorganisms passing through your air filter.
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However, this type of purification cleans as much air as your television. Most UV light cleaners are ozone free and will not damage lungs, but they also will not actually kill the pathogens. Air purifiers zip air through the filters and out the vents, creating air circulation in a room. Hospital UV lights are effective in killing particles by reducing or eliminating airflow.
Also, air purifier manufacturers do not usually explain what kind of UV technology they used, and some of these technologies produce high volumes of ozone. Ozone is not an effective or safe way to eliminate airborne pathogens. Since UV lights are not effective purification methods and could generate ozone, it is best to avoid air filters with this technology, or turn it off.
Summary
Air purifiers are an excellent tool in the fight against indoor allergens and pathogens. However, you should pay close attention to the technology the air filter uses. Clean air is not worth damaged lungs.