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The advice you read is an example of the phrase, "A little knowledge can be a dangerous thing." There are filters known as Variable ND filters that are basically two polarizer filters stacked on top …

Click 'Measurements-->Sharpness-->Profiles' to see a side-by-side comparison of the Zeiss 15mm f/2.8, the Canon EF 14mm f/2.8 L II, and the EF 16-35mm f/2.8 L II. Other than at f/2.8, the Canon 14mm …

The most common use case for large apertures on a wide angle lens is in low light, especially wide angle views of the night sky. Because of the Earth's rotation and the apparent motion of the sky, shu …

To do it seamlessly the camera would need to change the angle of view as the observer moved towards or away from the screen. It would also need to move from side to side or up and down as the observer …

What would I have to do to take such photos from a 50mm lens of a Dx camera? You can't take those pictures with a 50mm lens and a DX (1.5X APS-C) camera. To fit all of what an 11mm lens will giv …

Technically, Field is a specific linear dimension measured perpendicular to the optical axis of the lens system. The width of a field is determined by the angle of view (AoV) combined with the distanc …

First off, although the sellers label it as a wide angle lens, in reality what you are considering purchasing is more properly called a wide angle conversion lens because it screws onto and converts y …

For landscape photography the advantage of most prime lenses over kit zooms is not the maximum aperture, it is the sharper image it can produce at middle apertures (i.e. f/4-f/8) and better performanc …

Strictly speaking, image stabilization (IS) is not a necessary feature for any lens. For the vast majority of the history of photography IS as we refer to it did not exist. Plenty of remarkable photos …

The comparisons between the EF 16-35mm f/2.8 L II and the EF 17-40mm f/4 are a fairly mixed bag. It may well be that copy-to-copy variation of the same model is just as great as the difference between …

As others have said, you probably discovered the limits of your 18-200mm Nikon lens in terms of edge sharpness. It's hard for any lens to maintain sharpness all the way to the edges and corners when …

As someone who owns and uses both the Canon 5D mark II and the Canon 7D I think the biggest problem with your lenses is the anti-aliasing filter on your 7D. If increasing the sharpness setting in-came …

The Tamron SP 17-50mm f/2.8 Di II is an APS-C only lens. That means it projects an image circle large enough for APS-C sensors that are roughly 24 x 16mm (Nikon. Petax) or just a tad smaller in the ca …

How do they shoot wide television-show cast photos? One actor at a time. Then they composite them together. That's pretty much it.

This is fairly typical for wide angle zoom lenses, even those that are a lot more expensive than the Tamron AF 20-40mm F2.7-3.5 SP Aspherical IF. Roger Cicala, the founder and chief lens guru at lensr …