Is it bad to change the lens while the camera is still powered on? Nikon doesn’t recommend it. “… make sure you turn the camera’s power off before changing the lens as the image sensor itself generates a static electric … Continue reading →

All microscopes are designed to include a stage where the specimen (usually mounted onto a glass slide) is placed for observation. Stages are often equipped with a mechanical device that holds the specimen slide in place and can smoothly translate … Continue reading →

Zoom lenses are also popular with sports photographers because of the wide range of coverage they provide. When a surfer hits a wave and rides it toward the beach, you don’t want their body to overflow the frame as they … Continue reading →

The zoom capacity of a zoom lens is generally quoted as the ratio of the longest focal length to the shortest focal length, without regard to the image size. So its 55/18 or about 3:1 Zoom ratio. It is 18–55 … Continue reading →

Tuck the end of the cord into the wrapped cord so it does not unwind. Place the cover over the microscope. Hold the microscope by the arm and base while putting it away. Check to make sure your lab station … Continue reading →

Whereas, a vignette caused by a variable ND filter is simply underexposed. With that covered, let’s look at how we can apply a soft fix. Do ND filters cause vignetting? It’s especially vulnerable at wide angles. This is not vignetting, … Continue reading →

The working distance decreases as you increase magnification. The high power objective lens has to be much closer to the specimen than the low-power objective lens in order to focus. Working distance is inversely proportional to magnification. What happens when … Continue reading →

Tight lens syndrome is when a soft contact lens fits too tightly and starts to stick to your cornea. The cornea is the clear outer layer on the front of your eye. When a contact lens on your eye shrinks, … Continue reading →

Focal length size guide Focal Length Type of Lens What is it used for? 14mm – 35mm Wide angle Landscape, architecture 35mm – 85mm Standard Street, travel, portrait 85mm – 135mm Short telephoto Street photography and portraits 135mm+ Medium telephoto … Continue reading →

No, the true focal length of your lens won’t change when using an adapter. However, if you’re using a full frame sensor lens with an ASP-C or cropped sensor camera, this can change the equivalent or perceived focal length. Do … Continue reading →

Setting the ISO speed For most full-frame cameras, ISO 3200 or 6400 are great for night photography. For most crop-sensor cameras, ISO 1600-3200 are great if it’s a relatively new camera, or ISO 1600 if it’s a much older camera. … Continue reading →