Questions tagged [aperture-blades]

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

Filter by
Sorted by
Tagged with
1
vote
1answer
55 views

How do you know how much of an effect on the image will be when using a strangely shaped aperture like star-shaped or heart shaped?

Compared to regular pentagonal aperture, what effect does the image have if you use the aperture of the shape below? The above aperture has a pentagonal shape and has a protruding part to the side. ...
2
votes
2answers
260 views

Why does my lens aperture stop working a few hours after attaching the lens?

I recently purchased a used Sigma 105mm f2.8 DG OS Macro lens, and when I tested it during the purchase everything worked fine. A few hours later when I tried it again, I noticed that my pictures were ...
1
vote
1answer
182 views

How to reassemble aperture of Smena lens?

I was testing a Smena lens, and it was unexpectedly susceptible to veiling glare, compared with other Smena lenses I've used. So I took it apart to make sure the elements were positioned correctly. ...
0
votes
3answers
123 views

Do aperture blades move between each shot in burst mode?

Most professional cameras have a burst mode function. Furthermore, if the camera is SLR, the optical viewfinder shows what happens between the images in the burst, but when an image is taken, there is ...
2
votes
1answer
623 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 ...
8
votes
2answers
1k 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
347 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
4k 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
votes
2answers
2k views

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 ...