Questions tagged [aperture-blades]

Aperture blades make up the lens diaphragm which usually has multiple blades.

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1answer
375 views

Why many professional movie lenses have so few aperture blades [closed]

In many big-budget movies one see octagonal bokeh balls, in TV talk shows even pentagonal ones are common! Because these movie budgets are not small and the cameras in general are very expensive to ...
7
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2answers
823 views

Why did typical number of iris blades decrease from the 1950s to the 1970s and 80s?

I have in my collection a number of 1950s "silver" lenses, and they all have a high number of iris blades: 10, some even 12. On the other hand lenses from the end of manual focus era (late 1970s to ...
4
votes
1answer
302 views

Why do lens manufacturers produce lenses with few aperture blades?

A lot of lenses have very few aperture blades (especially budget lenses). A large number of aperture blades can make a real difference to the bokeh and seems like it should be a priority for the lens ...
5
votes
1answer
1k views

How does a circular polarizer affect the “stars” from strong lights at night?

When taking night photos at narrower apertures strong light sources such as streetlights demonstrate a star effect based on the number of blades in the lens' aperture. What effect would a polarizer ...
6
votes
4answers
3k views

What are the types of aperture blades?

The Canon EF 24-105mm f/4 L USM IS lens has rounded aperture blades. What other types of aperture blades are there, and what are the advantages and disadvantages of each of them? Is the aperture ...
18
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2answers
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Do rounded edges on aperture blades improve image sharpness, and how?

In the description for the XF lenses for its new X-Pro system, Fujifilm crows: The [XF lenses] all offer precise control over depth-of-field and deliver excellent out-of-focus bokeh thanks to the ...