![]() ![]() The "f" in f-stop is a number or value that represents the ratiobetween the size of the focal length of the lens to the aperture. They soon updated thisto an f with a slash mark to read Group f/64. He simply wrote an "f"and then put a dot similar to the old aperture settings. Van Dyke originally proposed the name US256,but Adams thought it sounded like a highway. This group was dedicated to pure photography,including portraits and landscapes. He and a few others, Willard Van Dyke, ImogenCunningham, Edward Weston, Hentry Swift, Sonya Noskowiak, and John Paul Edwards,formed a group called f.64. ![]() What's the widest aperture on a lens which are consideredįast, i would say it depend also bout the focal length, but let's give a between:Īll wide angle at f/2.8 and wider apertureĥ0 to 100mm f/2.8 to f/1.4 is fast to very-very fast.ġ01 to 200mm f/2.8 to f/2 is fast to very-very fast.Ģ01mm to 400mm f/4 is fast, if f/2.8 it's very-veryĤ01mm to 600mm f/5.6 is fast, if f/4 it's very-veryįast lens are usually more expensive thanĪverage lens, but if you are shooting people at night or indoor, you will often need a fast lens to not blur people with a slow shutter speed due to the lack ofĮffect on what it's called : The Depth of Field, and this effect is one of the most important effect in photography.The origin of the lower case "f" in f-stop goes back to 1932 andrenowned photographer Ansel Adams. You might have heard or read about those two words " fast lens", so aįast lens is a lens which can open very wide, usually a lens who can open to f/2.8 is considered to be fast by the majority not only because it let pass a lot more light thanį/4, in fact it let pass the double amount of light than a lens which can open at it's widest at f/4, but at f/2.8 the glass of the front element of a lens start to be quite Wide aperture are good for portrait photography or low light situation, narrowĪperture like f/11 or f/16 are often use for landscape (with a tripod) or when we want a big depth of field (soon "what's depth of field?") or a slow Tips about when and where to use a wide aperture like f/2 or a narrow aperture like f/8 or f/11. So now that you understand what's aperture and f/stop (if you have watched the video above), i will give you some Which give, control and tell you the amount of light you are controlling to hit the sensor of your camera. Those strange numbers like f/4 are the ratio (fraction-scale) of the size of the iris aperture What's the meaning of Aperture in photography? So what is the meaning of those strange numbers and their relation with the aperture ? But most important, Same thing! Let's try another one 1:3.5-5.6 mean exactly f/3.5-5.6 or f:3.5-5.6 all the same. ![]() you will not be surprised.Īt first to eliminate any confusion, you need to know that 1:4 mean f/4. Of f/x where "x" represent a number) i gave you this one also in case you encounter it. And more rarely this way too f:5.6-6.3 ( f:x instead On the lenses it is printed in this way 1:4 or 1: 5.6-6.3 to designate the maximum opened aperture. ![]() Very often if not always, in photography you will see, if not already seen, those fraction numbers which look ![]()
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