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Whats depth of field all about?

Depth of field is an indispensable creative tool — but what exactly is it, and how can you control it?

Depth of field, or DoF for short, is the distance between the nearest and farthest objects in a scene that appear acceptably sharp in a photo. We say ‘acceptably sharp’ because only one point will be truly razor-sharp in your pictures, as your lens can only focus at a single distance. However, the sharpness falls off gradually both in front of and behind the point you’re focusing on, and the depth of field is a measure of how far this

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Unique landscapes.

Learn how to shoot scenery with a shallow depth of field.

The lens aperture is one of the three settings (along with shutter speed and ISO) that control exposure, as it determines how much light falls on the sensor. However, it also has an effect on the creative look of the image because it controls the depth of field too — the zone of sharpness either side of the point of focus.

The principle is quite simple: the smaller the aperture, the greater the depth of field.

While that bit is straightforward, a little confusion is caused by the way

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SHORT AND SWEET

1. Greenhouses are great places to photograph flowers because the lighting is usually diffused and there is no wind. Wind is the enemy of macro photography. Most public greenhouses allow tripods, too, so you can have as much depth of field as you want.

2. Landscape photography requires complete depth of field virtually without exception. I recommend using f/22 or f/32 if foreground elements are close to the camera. If everything in the composition is far away, then you should use f/8 for maximum sharpness.

3. When traveling to another city, stay in a hotel with a great view. You

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ONE Jerk for all occasions.

It is widely believed that jerkbaits can be used only in the spring, as well as in shallow waters to catch pike, zander and perch. David

Hagemayster considers it a great mistake.

Using little tricks, fishing guide uses jerks and summer catchability places.

I rarely meet in the waters anglers who catch predatory fish on jerkbaits. On the one hand, this can be explained by the high cost of such baits, on the other hand — the false understanding that jerks the spring can successfully catch and in the rest of the year they can be fished a shallow

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Depth Of Field

By varying the aperture on your camera lens, you can control the image brightness, as well as increase the range of objects that will appear sharp at a single focus setting. This band of sharpness is called depth-of-field.

In SLR cameras, you can observe the lens diaphragm change as you vary the aperture. Aperture, as has been mentioned earlier, is shown in f/numbers or f/stops. This is an internationally accepted number scale that runs as f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f//11, f/16, f/22 and so on. When a lens has an aperture of say f/1.4, it is termed a

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Mogilevsky land unwilling to keep the NPP?

Until sites where nuclear power facilities should be located, in globally very strict specifications. Thus, the soil must withstand loads up to 7 tons per 1 square meter, as tall buildings achieve 60 meters. The reactor itself is located underground at a depth of 20 meters.Distance between Krasnaya and Kukshinovskaya foothold in Chaussky and Shklovsky areas — only 30 km away, because the identity of the deep structure is completely understandable.In this case, this similarity is not much fun responsible for the design work. Admitted as head of surveillance harmless conduct of work in the nuclear industry ("Promatomnadzor") Alex Goldfinches,

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Unique military nuclear bathyscaphe was tested in the Arctic

Deep-water nuclear power plant project 10830 "gate" received for the unusual design of the nickname "Losharik", took part in the expedition "Arktika-2012" in underwater drilling operations offshore Mendeleev in the Arctic Ocean, write "News".

As described in the Defense Ministry, the boat helped to adjust drilling operations, which were carried out with a diesel-electric icebreaker "Kapitan Dranitsin" and "Dixon" to define the outer boundaries of Russian Continental Shelf. "Carrier" Losharik "is reworked strategic submarine of project 667" squid ", which has been dismantled ballistic missile silos — bathyscaphe fastened under her head"

"By working together to get a huge

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Sudozavod Pella has completed testing tug Sfinksa for Freeport

JSC "Leningrad Shipyard" Pella " finished running, traction and escort tug test project Sfinksa 16609 for Freeport. The press service of the shipyard. Tests confirmed the indicators of stability and maneuverability. The tractive force is 47.7 tons, the holding force when the escort — 49.9 tons. Currently, the ship is preparing to move into the area of operation. Length of the tow — 28.5 m, width 9.5 m, depth — 4.8 m, overall depth — 3.5 m, speed — about 12 knots.

 Photo source:pellaship.ru

Recall that in August 2011 it was announced that JSC "Leningrad Shipyard" Pella "won

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MRO probe has helped scientists to study the underground water channels on Mars

08.03.2013

 

U.S. planetary scientists have confirmed the existence of a system of giant canals under the Elysium volcanic plateau on the equator of Mars, the resulting output of groundwater to the surface of the red planet, according to a paper published in the journal Science.

"Our work has shown that we have underestimated the degree of erosion of the surface of Mars and that the depth of the channels is approximately two times greater than earlier estimates showed. Apparently, the source

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Kamchatka deep earthquake was the most powerful in the history of

September 20, 2013. Seismologists from the University of California found that 8.3-magnitude earthquake in the Sea of Okhotsk, occurred on May 24 of this year, was the most powerful of all known deep earthquakes. Research published papers Science, its summary can be read on the University website.

Scientists have found that seismic activity hypocenter was at a depth of 609 kilometers under the shelf of the Sea of Okhotsk. Earthquake, so no doubt be attributed to a poorly-studied class of deep, although the velocity of the fault, and some other indication it was "very similar to the surface of

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