![]() ![]() Next, place your camera on a tripod and take some test shots to compare.Īn open aperture was used to blur out the foregroundĪnother common example of when an open aperture is ideal is during night photography. So, have a look at what the widest aperture of your lens is and use that to calculate the optimal aperture for overall sharpness. #F stop comparison professional#Since the majority of professional lenses have the widest aperture of either f/2.8 or f/4, you’ll often hear that the best aperture is either f/8 or f/11. A faster lens, such as the 14-24mm f/2.8, has a sweet spot between f/5.6 and f/8. This spot is located two to three f/stops from the widest aperture.įor example, the sharpest aperture of the Nikon 16-35mm f/4 is between f/8 and f/11. The sweet spot of a lens is the aperture that gives the best overall sharpness. I recommend reading our Introduction to Aperture in Landscape Photography for further understanding of this subject. ![]() When referring to the sharpest aperture, I’m referring to the point in which the overall image is at its sharpest. Note: in this article, we’re talking about overall front-to-back sharpness not Depth of Field sharpness. The best aperture for my system might not be the same as for yours. If you’re just learning about aperture it might sound confusing that the sharpest aperture depends on the lens you’re using. Let’s take a closer look at what this is before we move over to the situations you want to use it. It’s at that setting you’ll find the greatest front-to-back sharpness with your setup. You don't have to know that one lens takes more light than another or spend any time calculating and compensating for the light loss.Step one is to find your lens’ sweet spot. Using t-stops just means you don't have to worry about it or think about it at all. I guess more still shooters are measuring through the lens more often, but enty of people use light meters in the stills world. If you're using slide film with has so much smaller a latitude that it could really affect your exposure. It sounds crazy to me to use a light meter, but *know* that if you set it to that f/stop, that you aren't feeding the sensor or film enough light because there is no compensation for the light loss.especially since there aren't markings on the side of the lenses to help you compensate for the light loss the way filters will tell you the filter factor. It's just how they are marked for cinema.Īs far as why still lenses use f/stops.who cares? This is a film blog. I mean, sure, they have to calibrate them (you know, measure the light going in and compare it to the light coming out the other side), but that's really no different than making sure your 25mm lens isn't really 24.9mm or your 114mm front diameter (or 104mm, 95mm, 80mm.etc.) isn't mismeasured. Measuring t-stops are not why cinema lenses are more expensive. ![]() So, what's the big deal? "My lenses have f-stops-should I find ones with t-stops? Are my images suffering because of this?" Hold your horses-and no, probably. Chances are you will be able to do your job just fine without the added power of an expertly calibrated lens with t-stops, but Sudhakaran shares three things you should think about now that you know more about f/t-stops. This is why lenses that show t-stops tend to be so expensive, like the cinema lenses of Cooke, Zeiss, Angenieux, and Leica, because manufacturers have to put each lens through a lengthy and costly testing process. However, while f-stops are a "theoretical" measurement, t-stops are actual measurements that are tested when the lens is calibrated. Video is no longer available: F-stops and t-stops both represent a certain value, one that is determined by the focal length of a lens divided by the diameter of the aperture. Most filmmakers and photographers are familiar with what an f-stop is and how each measurement on your camera affects your images, but how many know about t-stops? Sareesh Sudhakaran of wolfcrow puts it all in terms anyone can understand in the video below, explaining the differences between the two, as well as why it might be more helpful to use t-stops for filmmaking. If you've never bothered to learn about the difference between f-stops and t-stops, now might be the time. ![]()
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