Questions tagged [aperture]
Aperture is the opening in the diaphragm of a camera lens. For questions relating to Apple's photo management software, please use [apple-aperture] instead.
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Under what circumstances does f/22 cause diffraction?
Today I went out to get a photo of a historic building with a lake in front and opted to shoot at f/22 with a tripod. To my surprise, the images aren't sharp. I also used the Olympus high res mode and ...
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Is diffraction limited aperture independent of lens?
I have always understood diffraction limited aperture as a property of the camera and its sensor, not of the lens. The camera has a certain sensor size and a certain megapixel count, which together ...
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Do smaller apertures provide more depth of field past the diffraction limit, even if peak sharpness suffers?
In Understanding Exposure (3rd edition, on page 48), Bryan Peterson has what might be called a rant against modern on-line conventional wisdom about diffraction limits. Answers on this web site are ...
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Taking pictures of moving objects in low light indoor settings without shake. Canon Rebel T7
I'm sort of new to photography and have been successful taking great photos during the day with good light. But anytime that I am indoors/outdoors with low light I can't seem to keep the image in my ...
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Why won’t the aperture adjust on my Sony A camera? [closed]
I recently bought a telezoom objective without built-in AF. I did not bother because my camera has an AF which could handle the focus on such lenses.
I always had used lenses with built-in AF so I did ...
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How to calculate the optimal pinhole size?
As far as I've understood, optimal diameter for pinhole size is calculated by formula
where
d - the optimal diameter for pinhole
c - constant
f - focal length (distance between pinhole and ...
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What is the major difference between aperture and shutter?
There is some thing which I get from google is: Aperture controls sharpness and focus of photo and also how much light enter in camera. Shutter is how much time shutter open and get light into light ...
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My aperture won’t go any narrower than f/8.0
I am using a Nikon Coolpix p900 with optical zoom lens of 24–2000. I am going to shoot fireworks so I was trying to set up before hand. My settings are on manual, ISO 200 and 1/30, but my aperture ...
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Does the time required to stop down the aperture affect the shutter response time?
In a (D)SLR. When pressing the shutter release button the camera must first move the diaphragm to the required setting. When a small aperture is selected it has to move it more than when you shoot ...
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How can I experimentally determine the size of my lens’s aperture?
I have a Canon FD 28mm f/2.8 that I shoot on my entry-level Canon DSLR using an adapter. You have to set the aperture manually, but only every second aperture is marked: between ƒ/2.8 and ƒ/4, for ...
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How did this note "19/65 21/90 22/130" help previous owner of this old Zenit 12XP film camera?
Camera info
The camera in question is an old Zenit 12XP. It belonged to my passed-away father-in-law.
It has shutter speed regulations: B, 30-X, 60, 125, 250, 500
"ГОСТ/ASA" (ISO): 16 * 32 * ...
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Can a smaller sensor's "crop factor" be used to calculate the exact increase in depth of field?
If APS-C and similar crop-sensor digital cameras have a focal length multiplying effect such that a 50mm lens has an apparent focal length closer to the field of view of an 80mm on a full frame camera,...
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Canon AE-1 Aperture Lever in camera sticking
The lens I have confirmed to work on my back other A-1 but for some reason this camera body isn’t allowing the aperture diaphragm to fully close. It’s working from f1.4 to f5.6 but anything more it ...
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How to maximize depth-of-field with a tripod
I'm shooting with a Sony A7C and a 35mm f/2.11 ZA Lens. Suppose it's the middle of a Summer day at high altitude. I'm using the Intelligent Auto setting, the camera identifies the scene as landscape, ...
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Tamron SP 500mm mirror lens changing aperture and DOF
Please help me understand. I have the above F8 mirror lens. I know the difference between F stop and T stop. I have measured this T stop experimentally it is higher than F8. The DOF feels very narrow ...
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Do you get more bokeh on a APSC sensor with a full frame 50mm f/1.8 lens or a APSC 30mm f/1.4?
I am trying to compose a detail shot where I want to get as much background blur as possible. I am using Sony a6500 camera (APSC 1.5x crop factor body). I am considering two lenses:
Sigma 30mm f/1.4 (...
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What apertures are required to enable autofocus, including cross-type or high-precision focusing, on Canon DSLR cameras?
This is a follow-up to Why does Canon and Nikon limit or disable autofocus beyond certain f-numbers? I'm doing this to separate the AF aperture requirements from the linked question above. My goal ...
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RAW export in Aperture giving square "grid" pattern over noise
I have a RAW photo in aperture that has quite a lot of noise. When I export the photo to JPEG (and TIFF/PSD, 16 bit) I get a strange square grid like pattern on the photo.
Here is an example of the ...
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Canon M50 showing aperture f22 using Sigma 18-300mm f3.5-6.3 [duplicate]
EDIT: not sure how to delete my post but I just realized the numbers represent the minimum f number, so this makes sense!
I recently purchased both a Canon M50 and Sigma 18-300m f3.6-6.3
I understood ...
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Is it possible to calculate field of view and aperture given focal length, k1 and k2?
I have some data coming from an API that looks like this:
"camera_parameters": [0.785028, 0.032519, -0.053622]
and the data structure that I would like to obtain should look something like ...
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How to change aperture in manual mode on an entry-level Nikon SLR?
In manual mode on my Nikon D3200 I cannot change just the f/stop setting. It only changes in relation to the other settings. How can I reproduce settings that I have found in books on photography if I ...
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Why smaller AoV APS-C has same aperture as larger AoV FF lens?
I am quite confused,
FF focal length 50mm f/2.0 has aperture diameter 25mm
APS-C lens 50mm f/2.0 has aperture diameter 25mm
Then both lenses have same size front glass.
However Angle of View for lens ...
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Would a prime be redundant with a fast zoom?
Now that I am finally getting a fast zoom (Tamron 17-50mm 2.8) I've been considering a fast prime to go with it, specifically a Sigma 50mm 1.4. Despite its shortcomings, it still does really nice ...
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Is aperture the same on different format of lenses?
I have just acquired a large format lens (a Schneider-Kreuznach Angulon 1:6,8/90) for the first time, coming from 35mm and medium format, and I am a bit puzzled by its aperture.
I want to make sure I ...
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Whats the approximate aperture of a pinhole camera?
There are plenty of different pinholes you can make! Assuming I am being a little bit less creative and I am making a matchbox pinhole camera lens using a drawing pin in a sheet small sheet from an ...
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Should I use rounded or exact f-stop values for a depth of field calculator?
I'm designing a DOF calculator. Looking at other calculators, I can see that some of them use rounded values (e.g. f/2.8) and some use exact values derived from the square root calculation (e.g. f/2....
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How to remove oil from aperture blades?
If you go on ebay or other second hand places, you'll see a fair amount of lenses that have oil on the aperture (particularly on older lenses).
I've done some reading and it looks like this oil is ...
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Is deep depth of field AND bright exposure possible?
I know that a larger aperture corresponds to a brighter exposure and shallower depth of field for a given focal length.
Is it optically possible for a custom-built camera to form an image with both a ...
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What is the relation between aperture number and exposure, keeping all other parameters fixed?
My language is German, so forgive my lack in English words, especially with regard to photography.
I tried to understand at a very basic level the relation between aperture number and exposure and ...
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What lenses can produce a clean starburst effect?
I have seen several examples of a beautiful lens effect, naturally due to a stopped down aperture, but not like a lens star I have managed to create myself - it is so clean. Here is an example:
https:...
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What are the technical reasons to design lenses with oddly shaped apertures?
Some lenses have oddly shaped apertures, like star or shuriken shaped. It seems to be intentional since making "normal" rounded or polygonal apertures is fairly simple (as I have observed while ...
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Does lens speed still increase meaningfully when the physical aperture is larger than the sensor size?
This question came to me this morning, thinking about 50mm lenses. I have the Pentax 50mm f/1.7 (manual) and it's a very nice lens, but would be considered (relatively) slow on 35mm film, and many ...
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Why is my aperture mode taking forever to take a photo of the moon?
I tried to take a photo of the moon, I was in Aperture mode but it was like a self timer was on. It took ages, it took that long, I had to turn off the actual camera and of course, it took as soon as ...
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There are many f2.8 zooms for FF. Why are there so few f2/f1.8 zooms for APS-C?
APS-C/Super35 cameras are less staple for film than they were before, but are still widely used. Besides, there are quite a few semi-professional APS-C DSLRs on the market.
As far as I understand, a ...
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What should I do when my D3400 aperture is stuck no matter what lens I use?
I have a D3400 and recently I haven't been able to change the aperture on any of my lenses in manual mode. I have lenses with aperture rings and if I set the aperture to anything below the largest ...
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how to find best FX camera to avoid diffraction at small apertures
Long time Nikon user. Looking to capture highest resolution images at smallest apertures possible in order to obtain most depth of field.
Have read various scientific writing about diffraction and ...
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Aperture setting on the camera vs. the lens
I have a Canon 80D and have a question about the aperture setting on the camera vs. the lens.
I know about aperture, and my understanding is it's similar to how your eye works in letting in more or ...
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No1 Pocket Kodak aperture 1 to 4, f stop equivalent?
I have a lovely little No1 Pocket Kodak from about the 1920s or 30s. It is the bottom of the range model with the "Single lens". The aperture is not marked in f-numbers, but just labelled 1, ...
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In what way does the lens mount limit the maximum possible aperture of a lens?
In many answers to questions about different aspects of really large aperture lenses it's pointed out that the lens mount sets a hard limit on the maximum possible aperture of the lenses to that ...
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Why does an iPhone need software for Portrait Mode? [duplicate]
I have an iPhone X, with a camera specs of:
Wide-angle: ƒ/1.8 aperture
Telephoto: ƒ/2.4 aperture
Why does the phone need software to produce Portrait Mode image (image with background blur / bokeh)? ...
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New but old Canon 20 - 35mm f3.5 - 4.5 will no longer stop down to f 3.5
Need some info/help please. I have a 6dmk2. I bought a brand New/Old Canon 20 - 35mm f3.5 - 4.5 Love this lens, inexpensive, light and exactly what for my needs. PROBLEM: it will no longer stop down ...
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Is there any practical way to measure the T-stop of a lens?
T-stop measures actual light transmission in a lens. Therefore, different f/2.8 lenses can have different T-stops. T-stops are usually only given for cine lenses. For photography lenses, is there any ...
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focal length to aperture relation while zooming - is my russian lens lying to me?
I have this old soviet/russian "Granit" 80-200mm lens, connected to my Canon 550d DSLR through M42 adapter. I also have "modern" kit 18-55mm lens.
What I don't get is how aperture ...
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Does this telescope only have a 4 blade aperture?
I was just looking at an image from NASA's APOD project
I noticed that the starbursts are directly horizontal and vertical. If I recall correctly, on my DSLR I get one "ray" per blade. So does that ...
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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.
...
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Why don't I see a difference in the brightness through my viewfinder when I change the aperture?
If I change the aperture for a particular photo, why don't I see a change in the brightness of the image in the viewfinder?
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Which Konica AR to NEX E-mount adapters support manual (mechanical) aperture control?
I have a Tokina 28mm f/2.8 lens which uses a Konica AR mount. I am trying to adapt it to fit on an E-mount body. However, the lens has a manual mechanical aperture control (circled in yellow). Are ...
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Using FF lens on APS-C changes lens aperture value?
Someone told me that hen using Full frame lens on APS-C camera (1.5x crop factor) in addition to multiplying focal length by crop factor (e.g. 35mm * 1.5 = 52mm actual focal length on APS-C) you also ...
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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 ...
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What causes images to have flat depth?
I am learning about photography and I remember reading about an effect that causes images to look like there is no depth but now I cannot find what it is called or what causes it.
I remember an ...
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