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 →

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 →

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 →

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 →

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 →

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 →

Nikon Model I. Less than two years after the completion of blueprints in September of 1946, the first Nikon camera, the Nikon Model I, was launched in March of 1948. Are old Nikon cameras worth anything? “Classic Nikon F cameras, … Continue reading →

No. It’s not. It puts out lots of vapors you don’t want on the optics. Can you lubricate a camera lens? Lightly Lubricate The Focus Lens Applying lens lubricants in extremely light quantities can help to fix a stiff lens … Continue reading →

If you order progressive lenses online go with the anti-reflective coating. Always get that in addition. It makes the lenses more transparent and will give you a more natural look. Because the person in front of you will have an … Continue reading →

The short answer to your question: Yes, you will lose image quality. If you resize your images down to a smaller size, and then size back up again, your image will be a lot less clear. When you resize the … Continue reading →

The desire for longer range zoom capabilities and larger image sensors to close the gap on DSLR cameras are the two biggest factors driving the trend. It’s no coincidence that smartphone cameras offering industry-leading sensor sizes, zoom capabilities, and image … Continue reading →

Why are Zenni glasses so cheap? There are various reasons why Zenni Optical is able to keep the cost of its eyeglasses low. Zenni glasses are made at a dedicated factory and shipped directly to the consumer. Also, because Zenni … Continue reading →

GlassesUSA has a B rating on the Better Business Bureau website and a 4.5 (excellent) rating on Trustpilot. Most customers give GlassesUSA favorable reviews. The complaints that have been logged tend to be about returns or exchanges for glasses that … Continue reading →

Top 10 Essential Photography Gear For Wildlife Photography Suitable Camera. Which camera you go for is very much down to personal preference, however there are certain things to look out for when choosing your first camera. Telephoto Lens. Teleconverter. Wide-Angle … Continue reading →

When it comes to wildlife photography, a top class tripod is certainly one of the best investments you can make. As a professional wildlife photographer for the last 8 years, I’ve been through multiple iterations of cameras, many lens revisions … Continue reading →