Full frame vs APS-C sensors – Test 1 – Good Lighting Conditions. The first pictures we will use to test image quality are the two below. One was taken on a full frame Nikon D850 45 mega pixel camera, and the other was taken on a Fuji XT-4 APS-C 26 mega pixel crop sensor camera.
This is a smaller sensor size than full-frame (36mm x 24mm) or APS-C (23.6mm x 15.7mm). This means a compromise in terms of raw image quality and dynamic range, however it offers up a number of advantages in other areas. Micro Four Thirds cameras are able to offer a physically smaller camera body, as well as Full frame (36mm by 24mm): The largest sensor size is called full frame, as it is the same as a frame of 35mm film. Full-frame sensors are almost twice as big as APS-C sensors. Full-frame sensors Why would you shoot an APS-C camera at the same ISO as a full frame? If you are shooting with a 50mm lens at f/5.6 and ISO 400 on the full frame, then you should be shooting an APS-C with a 35mm lens at f/4. And ISO 200. Remember, with the APS-C you can open up by one f/stop and get the same depth of field as the full frame. This term – full-frame – was defined in contrast to more minor, or APS-C, camera sensors. A full-frame lens is roughly equivalent to a 35mm film frame, while an APS-C sensor is slightly smaller. When you mount a full-frame lens on a camera with an APS-C sensor, you will get a crop factor; your camera's APS-C-size sensor magnifies the scene
A particular lens will give different fields of view if it’s used with cameras with differing sensor size. For instance a 50mm lens on a Full Frame camera will give you a field of view of about 46°, but on the smaller sensor of an APS-C camera, the same 50mm lens will give you a 31° field of view, showing you less of the world.
If you've already got a full frame camera, then a 70-200mm F4 offers a very similar set of capabilities to a 50-150mm F2.8 on APS-C (same zoom range, similar light capture and depth-of-field). But any cost benefit of buying a 70-200mm F4 rather than an equivalent zoom is lost if you have to buy a full frame camera to gain access to that capability. ‘Full frame’ and ‘crop’ refer to a camera’s sensor size.Full frame sensors share the same dimensions of 35mm film (24 x 36mm). Crop sensors are anything smaller than 35mm, such as those found in APS-C camera sensors and Micro 4/3 cameras. I'm just looking for ballpark numbers here, like: it costs $50 to manufacture an APS-C sensor and $500 to manufacture a full-frame sensor. To keep this question focused, let's ignore lenses and focus on the bodies. Let's also ignore the higher expectations of full-frame photographers. That comes from the price. Here are a few things to keep in mind when deciding between full frame and APS-C cameras: Price. Full frame cameras tend to be more expensive than APS-C cameras. So, if you are looking for a camera that is more affordable, then an APS-C camera may be a better option. Image quality

Key Takeaways: APS-C sensor uses a wider angle, and the image ratio is bigger than in Micro 4/3 sensor, which can crop the image. The Micro 4/3 sensor is way more compact and light, but the image quality is APS-C is visibly better. The price range is different. APS-C comes with higher prices, whereas Micro 4/3 offers affordable price tags.

Image Quality. One of the primary reasons photographers may opt for APS C cameras compared to MFT models is image quality. The larger the physical sensor in the camera, the bigger the pixels in the photos, increasing image quality. Since APS C has a considerably larger sensor size, you’ll have higher resolution images to work with.

The difference between lenses designed for smaller sensors and for full frame is that one covers the entire full frame sensor, the other one doesn't. But if you buy a 16mm lens designed for APS-C cameras, you'll still get a 24mm FOV on an APS-C camera, the same thing happens when you use a full frame 16mm lens on an APS-C camera. Full frame sensors are the same size as 35mm film, measuring 24 x 36mm. APS-C sensors are smaller at around 15 x 23mm, though the exact size can vary depending on the make. You might see
For example, a 28 mm lens is a wide angle lens on a traditional 35 mm camera. But the same lens on an APS-C camera, with a lens factor of 1.6× (relative to a standard full-frame 35 mm format camera), has the same angle of view as a 45 mm (28 mm × 1.6 lens factor) lens on a 35 mm camera—i.e. a normal lens.
Alternatively, instead of a 35mm equivalent, it can determine another equivalent, for example, APS-C or 1” equivalent. This feature can be used to play with various sensor sizes and focal distances to better understand how this equivalent works. Example: Calculate the equivalent focal length of a 50mm APS-C lens for a 35mm full-frame sensor.
It depends entirely upon the teleconverter in question, the lens in question, and the full frame and APS-C cameras in question. The same is true when comparing a full frame camera + 1.4x to an APS-C camera when both use the same lens. Optical quality is never better than the weakest link in the equation.
The biggest difference between full frame and APS-C is size. This starts with the birth of 135 film. After Germany developed the LEIKA camera for shooting 35mm (36mm × 24mm) film in the 1820s, the 35mm film was also called the Leica roll.
A 35mm lens on an APS-C body will have the same view angle as a 50mm on a full-frame body. Since you mention DX, I assume you're using Nikon. The Nikkor 35mm f/1.8 DX lens is sharp but has noticable barrel distortion which can be reduced in post processing. yygbpW.