what shutter blades has to do with image quality?How does the lens elements affect the IQ and is it better to have more shutter blades?
From the few replies, my understanding is:
- more lens element better IQ cos light 'process' before reaching sensor
So the better lens would be one with more lens element (better IQ) and more blades (better bokeh) if the focal lens is the same.
Correct me if I am wrong
the better lens is the one that serves your purpose.So the better lens would be one with more lens element (better IQ) and more blades (better bokeh) if the focal lens is the same.
Correct me if I am wrong
Better lens elements improve image sharpness, contrast and colour. They are also known as ED glass (Extra-low Dispersion).
Basically better quality equals better image capture. The glass captures the image before being fed to the sensor.
Having more shutter blades normally allows you to achieve a more circular aperture opening.
As a result your bokeh (background blur) will be smoother.
If you have a blurred light point, you can see clearly the shape of the bokeh.
Sometimes they are 5, 6, or 7-sided points, rather than a nice round point.
From the few replies, my understanding is:
- more lens element better IQ cos light 'process' before reaching sensor
- more blades means bigger aperture, hence more bokeh. Hence cannot get same f-no with diff number of blades
So the better lens would be one with more lens element (better IQ) and more blades (better bokeh) if the focal lens is the same.
Correct me if I am wrong
From the few replies, my understanding is:
- more lens element better IQ cos light 'process' before reaching sensor
- more blades means bigger aperture, hence more bokeh. Hence cannot get same f-no with diff number of blades
So the better lens would be one with more lens element (better IQ) and more blades (better bokeh) if the focal lens is the same.
Correct me if I am wrong
Wrong.
The amount of lens elements is defined by the type of the lens, the optical requirements and the maximum aperture. Compare the structure of prime lenses and zoom lenses and you'll notice some patterns. Also, compare a kit lens (18-55 etc.) and a superzoom (18-270), pay attention to the maximum aperture as well.
You can find 50mm f/1.4 lenses with 7 blades and with 9 blades, so the whole "cannot get same f-no with diff number of blades" statement is rubbish.
How does the lens elements affect the IQ and is it better to have more shutter blades?
So what will be the difference bet the 7-blade 50mm f/1.4 lens and the one with the 9 blades?
I am asking this question because when I read specifications they always mention number of lens elements in so many grps and sometimes the number of aperture blade. Just trying to understand why the elements and number of aperture blade is mentioned.
For example I noticed that the Canon L lens usually has more lens element than the cheaper lens eg EF 50mm f1.2L has 8 lens elements with 8 aperture blades whilst the EF 50mm f1.8 has only 6 lens elements with 5 aperture blades.
So from the discussions I cleared one hurdle - that more aperture blades gives better bokeh
U compare the price, built and performance between the f/1.2 and f/1.8 II. It's like comparing a Toyota to a Lambo for example. More blades only makes the circular highlights more round.
Sorry, maybe wrong comparison. How about this comparison: Canon EF70-300 f4-5.6 with 15 element with Tamron AF70-300mm f4-5.6 with 13 element? Just from this specification alone and not from brand name reputation, can any inference be made about which lens is better; akin to comparing computer specs before purchase