What is the rule of 500 in photography?

Term: Description: The 500-Rule states that to obtain a clear image of stars without trails, take the number 500 and divided it by the focal length to get your exposure time. For example, a 20 mm lens would call for an exposure of about 25 seconds and theoretically, still obtain the stars without trails.

slrlounge.com - 500 Rule Definition - What is 500 Rule by SLR Lounge

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The 500 Rule

What is the 500 rule? The wider your lens, the longer your shutter speed can be before the stars start to move. The equation divides 500 by the focal length of your lens. For example, with a 50mm focal length, you’ll have 10 seconds before the stars move (500 divided by 50 equals 10). With a 24mm focal length, you’ll have 40 seconds before the stars move. Basically, the shutter speed limit changes based on your focal length.Here is a rough starting point to help practice: On a zoom lens: ISO = 6400, aperture = f/2.8, shutter speed = 15 seconds On a prime lens: ISO = 3200, aperture = f/1.4, shutter speed = 8 seconds The earth rotates at around its axis 1,000 miles per hour and hurtles around the Sun at about 70,000 miles per hour, yet the stars in the distance seem to creep idly by every night. When deciding on what maximum exposure time should be used these Astro bodies can be challenging for those trying it for the first time. For astronomical photos of the Moon’s surface, usually, the Looney-11 rule is a great starting point (f/11 and shutter speed to ISO setting). Similar to the Sunny-16 Rule, it allows for sharp well-exposed images without a light meter. Star trails can be a desired effect, but for images of the stars-as-dots, the 500-Rule should be followed. Provided you have the right equipment, it mostly comes down to tweaking your camera settings. A wide fast lens, such as the Tamron 15-30mm f/2.8, are fantastic for capturing images sharp clear images. Another useful tip is to avoid light pollution from major metropolitan areas. Sites like Dark Site Finder help you find the area closest to you that has the minimal amount of pollution, though sometimes it is hours away it can be worth it especially if you have never witnessed the full splendor that is the Milky Way.

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What foods make you sexier?

5 Sexy Foods To Get You In The Mood Garlic. Rather than repel your intended, garlic is actually one of the better-known aphrodisiacs. ... Asparagus. ... Chilli. ... Chocolate. ... Avocado. ... Looking for Valentines inspiration?

ilovecooking.ie - 5 Sexy Foods To Get You In The Mood - ILoveCooking

This Valentines Day, if you want to boost your bonking potential, then serve up meals laden with foods that are guaranteed to liven up your love life. Check out our top 5 sexy foods to get you in the mood.

Garlic

Rather than repel your intended, garlic is actually one of the better-known aphrodisiacs. People have been using it to improve their sex drives for centuries, because it contains a chemical called allicin that increases blood flow to the sexual organs and makes us feel all warm and squidgy inside.

Asparagus

In the 19th century, asparagus was served to bridegrooms in a pre-wedding feast so that they would be successful in the marital bed. Today, asparagus is one of the most well-known sexy foods. It’s filled with folic acid, which helps to ensure reproductive health but is also rich in vitamin E, which makes you glow, inside and out.

Chilli

Chilli peppers stimulate endorphins, our feel-good hormones. They are also rich in capsaicin, which speeds up our heart rate and makes us sweat – imitating the way we feel when we are in deep arousal mode.

Chocolate

For ultimate sexiness choose the darkest chocolate you can find. Cocoa is a source of phenylethylamine, known as a love booster because it quickens your pulse and tricks the brain into feeling as though it is falling in love.

Avocado

These superfoods were considered so overtly sexual that Catholic priests in Spain once banned their congregations from eating them. Rich in vitamin E which helps develop testosterone, estrogen and progesterone, avocados are the original sexy fruit.

Looking for Valentines inspiration? Check out our Valentines recipe collection here.

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