{"id":13759,"date":"2023-03-14T13:24:51","date_gmt":"2023-03-14T13:24:51","guid":{"rendered":"https:\/\/www.mcfade.co.uk\/blog\/?p=13759"},"modified":"2024-04-08T21:45:44","modified_gmt":"2024-04-08T21:45:44","slug":"why-constant-aperture-zoom-lenses-are-the-best","status":"publish","type":"post","link":"https:\/\/www.mcfade.co.uk\/blog\/why-constant-aperture-zoom-lenses-are-the-best\/%20","title":{"rendered":"Why constant-aperture ZOOM Lenses are the best"},"content":{"rendered":"\n

The main difference between a constant aperture lens like an f\/2.8 zoom and a variable aperture lens like an f\/3.5-5.6 zoom is how the aperture changes as you zoom in and out.<\/p>\n\n\n\n

A constant aperture lens maintains the same aperture throughout its zoom range, meaning that regardless of the focal length you set, the aperture remains the same. For example, an f\/2.8 lens will have a maximum aperture of f\/2.8 throughout its entire zoom range. The 70-200 can be F2.8<\/a> at 70 and 200mm. <\/p>\n\n\n\n

In contrast, a variable aperture lens changes its aperture as you zoom<\/a> in and out, meaning that the maximum aperture changes depending on the focal length you set. For example, an f\/3.5-5.6 lens will have a maximum aperture of f\/3.5 at its widest zoom setting, but as you zoom in, the maximum aperture will decrease to f\/5.6.<\/p>\n\n\n\n

The advantage of a constant aperture lens is that you can maintain a consistent exposure and depth of field<\/a> as you zoom in and out. This can be particularly useful in low-light situations where you need a wide aperture to let in more light.<\/p>\n\n\n\n

The price difference…<\/h2>\n\n\n\n

The disadvantage of a constant aperture lens is the price – it tends to be more expensive than a variable aperture lens, due to the complexity of the lens design required to maintain a constant aperture throughout the zoom range.<\/p>\n\n\n\n

The weight difference…<\/h2>\n\n\n\n

The advantage of a variable aperture lens is it requires less complex lens design, so it can also be lighter and more compact than a constant aperture lens. Better for travel perhaps. <\/p>\n\n\n\n

The practical difference…<\/h2>\n\n\n\n

The disadvantage of a variable aperture lens is that as you zoom in, the aperture decreases, which can make it more challenging to maintain a consistent exposure and depth of field. This can be particularly problematic in low-light situations where you need a wider aperture to let in more light. Additionally, a variable aperture can make it more difficult to achieve a pleasing bokeh effect (the blurred background), as the aperture changes with the zoom range.<\/p>\n\n\n\n

It’s never straightforward forward is it! <\/p>\n\n\n\n

Better quality but heavier and more expensive, versus lower quality but portable and cheaper. <\/strong><\/p>\n