A lens does not have the same sharpness throughout the complete aperture range. The sweet spot of a lens is simply the aperture value at which the lens is at its sharpest. For instance, most lenses are slightly soft at … Continue reading →

They have to be tubular because the optical elements inside have to be able to move to focus and zoom, and the lens body itself may need to extend. A few very long focal length prime lenses are somewhat conical, … Continue reading →

Focal length: The longer the focal length, the more visible the bokeh effect and vice versa. Shooting distance: The nearer the subject, the more visible the bokeh effect and vice versa. Distance between subject and background: The further away the … Continue reading →

Older cameras are also mostly mechanical, so if you pick the right one, you can repair it yourself. It’s the best way into a fascinating hobby. How much does it cost to get a film camera fixed? Repair Prices Cameras … Continue reading →

Now the company is crowdfunding a new and improved version of its digital back for 35mm SLRs, called the I’m Back 35. The main appeal of this quirky add-on is the same today as it was in 2017: convert your … Continue reading →

To evaluate calibration accuracy, you look at the distances between the detected points and the reprojected points. This is what a calibration algorithm typically tries to minimize. Depending on the calibration software you use, you may also be able to … Continue reading →

1,000 yards. Night vision devices let you see in the dark. With quality night vision goggles and scopes you can see people, animals, and objects up to 1,000 yards away on a dark night. How far can night vision camera … Continue reading →

You’ll not only gain the upper hand when you embrace it, understand it, and realize that advertising not only works, but it works on everyone — including you — but you’ll also become part of the ecosystem that will eventually … Continue reading →

Top 10 Things Burglars Avoid Strong Doors. Many people when purchasing a home, renting an apartment or building a new home can tend to get skimpy on details like the quality of exterior doors. Security Systems. Dogs. Well-lit Areas. Security … Continue reading →

The OnePlus 9 Pro has a curved display, a glass body and a metal frame, while the OnePlus 9 comes with a plastic frame, glass body and a flat display. The OnePlus 9R also has a flat display. Is OnePlus … Continue reading →

Before calling in the professionals, try the following tips to get your heater working again: Check that your thermostat is set to “heat.” Change the filter. Make sure the gas is on. Clear the chimney exhaust flue. Clean away leaves … Continue reading →

Overall, the camera quality on the iPhone XR is just fine, and it can go toe to toe with a multitude of other handsets on the market. Does the iPhone XR have good camera quality? Video recording is great on … Continue reading →

The camera houses an APS-C format (1.6x crop factor) CMOS sensor with 24.1MP (shedding 100 pixels off the SL2’s sensor) and the engine inside is the next generation DIGIC 8 Image Processor. Is the Canon SL3 full frame or crop … Continue reading →

The SL3 doesn’t have a stabilized image sensor, so it relies on lens-based stabilization. That’s typically fine for stills, but can struggle with handheld video. Canon offers digital stabilization, but it comes at a cost—an additional crop. Autofocus when recording … Continue reading →

The halibut season runs annually, from mid-March until mid-November. During the season, wild-caught halibut can be purchased whole, or in steaks, fillets and cheeks (the most tender, flavorful part of the fish). When can you buy halibut? Halibut is available … Continue reading →