A tripod collar, sometimes also called a lens collar, is a lens accessory that allows the lens to be mounted to a tripod. When the weight of a lens reaches a certain threshold, it’s no longer safe to mount the … Continue reading →

Yes, you can use a 35mm lens for portraits. The best way to shoot a portrait with a 35mm lens is to stay about 3ft-4ft away from your subject (don’t get too close) and keep their face towards the center … Continue reading →

Zoom lenses have also gotten impressively sharp – most, even some cheap kit lenses, are sharp enough for day-to-day needs and also boast effective image stabilization systems. Some of the modern pro-grade lenses offer image quality that matches or even … Continue reading →

In this tutorial you will learn about the 11 major types of DSLR and Mirrorless lens categories, such as wide and super-wide angle lenses, prime lenses, 50mm normal lenses, standard zoom lenses, telephoto lenses, and many more. What are the … Continue reading →

Microscope objectives are generally designed with a short free working distance, which is defined as the distance from the front lens element of the objective to the closest surface of the coverslip when the specimen is in sharp focus. What … Continue reading →

So, to look your best and brightest, find round or oval-shaped eyeglass frames that are thin and lightly colored. Avoid bottom-heavy frames, oversized frames, and frames with a lot of design elements. The goal is to draw attention to the … Continue reading →

Thus around f/1.0, a change of 0.1 corresponds to about 1/4 of an f-stop (by linear approximation): f/1.0 is about 50% faster than f/1.2, which is about 50% faster than f/1.4. Is higher or lower f-stop better? The lower the … Continue reading →

The field of view is largest on the lowest power objective. When you switch to a higher power, the field of view closes in towards the center. You will see more of an object on low power. Therefore, it is … Continue reading →