With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.
With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.
Similar to the number of aperture blades, rounded blades affect the way the light gets through to the sensor. Rounded blades, often only found on more expensive lenses, improve the appearance of the out-of-focus areas. This allows you to attain better, softer looking bokeh in your photos.
The aperture controls how much light gets through to the camera’s sensor. More blades is often an indicator of a better quality lens. It also allows you to achieve much nicer looking bokeh when blurring out your background, whereas a lens with less blades will often produce harsher, more polygonal bokeh.
A smaller aperture reduces the amount of light reaching the sensor. This is important in bright conditions where a wider aperture could result in your image being overexposed. Another advantage is that with a smaller aperture you get a greater depth of field, and can keep all of the image in focus.
A smaller aperture reduces the amount of light reaching the sensor. This is important in bright conditions where a wider aperture could result in your image being overexposed. Another advantage is that with a smaller aperture you get a greater depth of field, and can keep all of the image in focus.
Comments
Rick
10 months ago
9 / 10
GREAT LENS for the MONEY
Rick
10 months ago
9 / 10
The Sigma 100-400 lens I have is the Sony version, not the L-mount version. The camera I use it on is Sony A7RII. This lens (Sony version) works great providing you have sufficient light to work with but keep in mind that is the case with ALL lenses. I've taken photos indoors and find that the photos are just as sharp as my Sony 24-105 F/4.0 G lens. Outdoors in sufficient light even when cloudy the photos are great depending on how good you are at holding the camera and the right settings applied to any given situation. With plenty sunshine the photos are phenomenal. So, all in all, if all you're interested in is taking photographs and are on a budget this lens is great. Build quality is great. I have absolutely no problem with that. If you're the kind of person who beats up their lenses and abuses them then this may not be the lens for you; however, everyday normal wear and tear this lens is great. I've had mine for about a year now and have no problems with it whatsoever. I don't do video so I cannot give you any kind of worthwhile review but from what I understand this lens does ok with video, but it is not the best one out there if you are into videography. As for the weight I have had no problems carrying this lens around on lengthy hikes. Unlike many of the competition this lens is much lighter. This lens does not have a teleconverter. I'm told that the Sony teleconverter may work with it but the price of that teleconverter I am not willing to take the gamble. According to Sigma they have an agreement that they will not build one for the Sony E-mount version although they have one for the L-version. I contacted Sony and they couldn't tell me if their Sony teleconverter would work. I've also talked to other folks, and some say that it will work but not as good as expected. In such cases the teleconverter when attached produced photos that were either too smooth around the edges, too dark, or produced some other anomalies. They do not provide a tripod collar for this lens. I, for one, bought my lens second hand and it came with the collar.
Pros
Cons