Slains Castle

by pakman

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You need to understand that closeup (macro) photography requires apertures stopped down to about f/16 to have any depth of field at all. f/1.8 would be extremely unsuitable for macro. This f/16 also means in many cases you need to add some light to the subject. Your 18-55mm zoom is the most versatile, from wide angle to mild telephoto. It is only a $120 ...


I'm not a Nikon user, nor do I have much experience with Nikon lenses, but a 35mm F1.8 for $200 is a very good deal, I would go for that since it can double as a portrait and walkaround lens, not to mention the extra light you'll get at F1.8 compared to 2.8.


As Mike has already said, there is minimal technical distortion with lenses around 35-80mm. But to pick up on your other point, the "cropped" sensor of the D5100 will only take the image from the central part of a "full Frame" lens, which is similar to you taking the middle 67% of an image taken on a full frame camera. You are effectively cropping the ...


There are two types of distortion: 1) Perspective distortion caused by being too close to your subject 2) Barrel or pincushion distortion caused by the lens optics 35mm and 50mm primes generally have very little distortion in the lens so any distortion you would see would be perspective distortion. You would tend to get more perspective distortion with ...


FF sensors behave better in low light situations because of the pixel pitch, and inherent physical size of the photo sites. It does not have to do with the size of the image circle being created by the lens. If an aps-c sensor and a full frame sensor are the same MP, then the area of the image circle we can capture increases, causing the density of the ...


The job of the camera lens is to project an image of the outside world onto the surface of the image sensor. All lenses project a fairly large circular image. Only the center portion has good definition. The boundaries of this image are indistinct and dim. The boundaries are blurred because the image forming rays hit obliquely. What should image as points ...


Your last sentence gets it right. The extra light is wasted because it falls outside the sensor area. In the approximation that your lens is a single thin lens (it is not, but it is a useful way to think about it) the rays that pass through the center of the lens are not changed in direction. In full frame, you need rays that pass at a wider angle so you ...

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