F1 8 Vs F1 4

Aperture f 4 vs f 2 vs f1 . 4 Just about Photography

Today I am going to show you the practical difference between astrophotography photos taken with different apertures from a kit lens aperture of f4 through For example f 2 refers to your lens aperture being half-open. F 4 refers to it being 1 4 of the way open. That means that if you re using a 50mm lens an aperture setting os f 2 would be a 25mm hole. In the same lens f 4 would be 12.5mm and so on. Don t worry you won t have to calculate these numbers every time you go on a shoot.The Downside of F 2.8 It s important to recognize the types of shots you intend on taking. Image via nadia if. Really the only downside to this fast lens is the price. These are usually going to be considerably more expensive than the f 4. So just plan accordingly and if you absolutely need this aperture for a shot consider renting

The larger the aperture from f 2.8 down to f 1.4 the more light your lens will allow in to capture those night scenes. Prime lenses are great for low light situations some can go as low as f 1.2. Bokeh or the beautiful blurry background effect. A nice side effect of larger apertures low f-stop numbers is the creamy bokeh effect.Aperture Size Exposure Depth of Field f 1.4 Very large Lets in a lot of light Very thin f 2.0 Large Half as much light as f 1.4 Thin f 2.8 Large Half as much light as f 2 Thin f 4.0 Moderate Half as much light as f 2.8 Moderately thin f 5.6 Moderate Half as much light as f 4 Moderate f 8.0 Moderate Half as much light as f 5.6 Moderately large f 11.0 SmallYou ve probably heard the recommendation to shoot in primes to get the wider aperture. And when it comes to selecting the lens you probably have the option

A fixed maximum aperture like f 2.8 or f 4 meant consistent exposures no matter where the focal length of your zoom lens was set to. This mainly applies to shooting at maximum aperture but as this is where a lot of shooting is done it is thus very important. Canon 5D mark III EF 70-200mm f 4 L IS USM 116mm ISO 100 1 2 sec. f 11 The maximum aperture indicates the brightness of the image that the lens creates on the image sensor lenses with wider maximum apertures lower minimum f-numbers create a brighter image on the image sensor than lenses with small maximum apertures higher minimum f-numbers f 2.4 means the aperture is the length is the focal length divided by 2.4. So if you have a 50 mm lens the aperture will be 50 2.4 21mm. The reason to use the f-number in photography is that it is easier to set the exposure time of the camera using the ratio.

The difference is quite tiny and it is hard to imagine that spending the price of the f 1.2 lens for that reason would ever make sense. You can demonstrate the magnitude of the difference by using smaller stops and your depth of field preview button. A rough comparison would be to compare f 4 and something in the neighborhood of f 3. Dan. KENTGA wrote Hands-down the mood quality and separation of f 1.4 were preferable to f 5.6. But when comparing f 1.4 to f 2.8 there was less difference. The f 2.8 version had a little more detail but what I really noticed was the bokeh quality. The f 1.4 image looked softer and a better choice for a flattering portrait.f 2 is 1 stop faster than f 2.8 - so ISO 3200 vs 6400 f 1.4 is 2 stops faster than f 2.8 - ISO 1600 vs 6400 Larger apertures will also present you with a significantly shallower depth of field particularly with longer focal lengths which can make critical focus more difficult and may limit how many people you can get in focus unless they are all on the same plane .

As Douglas Herr explained each aperture f stop allows twice as much light to get to the film as the previous smaller stop. Thus f 1 is twice as bright as f 1.4 f 1.4 is twice as bright as f 2 f 2 is twice as bright as f 2.8 f 2.8 is twice as bright as f 4 close to f 3.5 etc.Despite that f 2.2 is better than f 1.8 in situations where you need to increase the focus area since its diameter produces a deeper depth of field. It s also excellent for low-light environments where you want more even sharpness across the frame you can adjust the lighting easily. Types of Photos Where You Can Use 1.8 and 2.2 AperturesSince x is being divided so larger the number smaller the opening. So f 2 means the aperture opening is half the focal length e.g for a 50mm lens it will be 25mm. It is commonly also written as F2. F4 means it is a quarter of the focal length. For a 100mm lens f4 will mean 25mm aperture opening. David Lascelles.

The brightness of the projected image illuminance relative to the brightness of the scene in the lens s field of view luminance decreases with the square of the f-number. A 100 mm focal length f 4 lens has an entrance pupil diameter of 25 mm. A 100 mm focal length f 2 lens has an entrance pupil diameter of 50 mm.If aperture f2.8 allows x amount of light into the camera then aperture f4 will allow x 2 amount of light. Here the f2.8 aperture allows one stop of extra light into the camera when compared to f4. In other words the light falling in the camera sensor gets reduced by half when you decrease the aperture by one full stop. 1 2 StopEverybody will agree that 2.4 is better than 2.8 if everything else is equal. But it is not. Unfortunately iPhone 4S lens has longer focal length. It s an equivalent of 35mm in classic 35mm camera terms vs 28mm for iPhone 4. iPhone 4 has wider lens which gives it an advantage when shooting in tight spaces or big objects .

The bokeh looks very similar between f 1.8 and f 1.4. In terms of low-light capabilities there s not even one stop of light difference between the two apertures. Personally when I was buying my prime lenses I went for the maximum aperture of f 1.8. It s more than enough for my needs and the price is significantly lower than the f 1.4 version. So does it make sense to invest in an f 1.4 lens Of course it does.