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.

Filter by
Sorted by
Tagged with
0 votes
1 answer
186 views

Canon 24-105mm aperture diaphragm screw size

I need to mount a Canon 24-105mm aperture diaphragm unit to something, but I don't have any screws for it. In the lens itself, it is attached to some sort of mount via 3 screws that screw into the ...
Bas's user avatar
  • 113
0 votes
1 answer
964 views

Verifying the integrity of your library

After reorganizing my image collection I moved a bunch of photos between different hard drives. While copying, I did get error messages. Fortunately, I had made multiple copies before doing the ...
Pete's user avatar
  • 3,302
-2 votes
1 answer
253 views

Does a high aperture impact exposure differently than a high shutter-speed? [duplicate]

Context: I am trying to shoot images that bear a black background /low-key. So I'm trying to understand this subject better. Edit: I would like to emphasize that this question is being asked with a ...
HelloWorld's user avatar
  • 1,145
6 votes
2 answers
806 views

How do XMP files encode aperture?

When I open a Lightroom XMP file, I read this odd line (the photo has been taken at f/8.0, all tools agree with that) exif:ApertureValue="6/1" Apparently, <...
PPC's user avatar
  • 234
10 votes
4 answers
3k views

Why is the background bigger and blurrier in one of these images?

On my EM-10 Mk2, I'm testing a Panasonic 25mm f1.8 (top image) against the 20mm f1.7 (bottom image). I tried to make the lamp take up the same space in the frame before focusing, yet the background ...
zakgottlieb's user avatar
9 votes
4 answers
1k views

What motivated lens makers to now use 1/3 f-stops rather than say 1/4 or 1/2 stops?

I've noticed that many older lens have just hard f-stops for lens (2, 2.8, etc). However, since the aperture wheel for some is continuous you can "stop" are some arbitrary point and shoot. From my ...
unsignedzero's user avatar
  • 2,063
0 votes
2 answers
246 views

No more F/1.2 primes?

A question from my dad: “Back in my day, all the cool kids used f/1.2 primes. Is there a reason why they don't make those any more?” If I had to guess, I'd take a stab that digital sensors don't ...
MathematicalOrchid's user avatar
3 votes
1 answer
452 views

Limits of camera lens capabilities [closed]

I read that the canon 35mm f/2 IS is the lowest aperture lens that also has IS. Is this because a stabilizer at any lower F-stop is not possible, or just because it is just currently outside of our ...
Ryan's user avatar
  • 1,135
12 votes
2 answers
8k views

Does aperture affect field of view?

I have some conceptual difficulties with understanding field of view and aperture. Let us say, I have a wide-angle lens, for example 20mm. Field of view directly ...
oneiros's user avatar
  • 223
0 votes
3 answers
2k views

Canon 70-200 f/4 L still sharp at wide open?

It recently came to my attention that lenses rarely perform at it's best when wide open. Is this the case with the Canon 70-200 f/4 L? Will I lose IQ by shooting at f/4 or should I shoot at 7.1 to be ...
Tindra's user avatar
  • 812
4 votes
3 answers
3k views

Which formula for f-numbers is correct: f/D or 1/(2NA)?

I've seen two different definitions for the f-number of a general-purpose lens. Are they consistent ? I'm assuming that subjects are distant (not macro, magnification is small), and we have a lens ...
JEJV's user avatar
  • 41
7 votes
3 answers
968 views

Does the maximum aperture vary linearly with focal length?

Many lenses list a range of maximum apertures. For example, the Nikon kit lens has a maximum aperture of f/3.5 at 18mm, but at 55mm it's only f/5.6. Does that mean that at half-way between 18mm and ...
MathematicalOrchid's user avatar
1 vote
2 answers
1k views

The command dial on my my Nikon 5100 suddenly stopped working — what can I do?

It was working fine. Just suddenly can't adjust the aperture or the f stop using the adjustment wheel while in M or A mode. In fact, the adjustment wheel doesn't work for any purpose. Basically the ...
Jeanna Wardell's user avatar
0 votes
1 answer
336 views

Nikon F - Lens with Built-in Autofocus Motor and Manual Aperture Ring

My question is as follows, is there such thing as a nikon-f mount lens that has a built in autofocus motor and a manual aperture ring? Or do the two contradict each other? The camera model is Nikon ...
Da Monster's user avatar
3 votes
1 answer
6k views

Can I control the aperture of a F-mount lens with aperture ring from the camera body?

If I buy a lens with a manual aperture ring like the Nikon AF 50mm f/1.8D, then does that mean that I can only control the aperture on the lens? Or can the camera control it too? I want one with ...
Da Monster's user avatar
3 votes
4 answers
1k views

Why does illuminance stay the same for a given f-stop even when focal length changes?

I'm trying to wrap my head around the math/physics of how illuminance on the film/sensor plane remains equal for a given f-number regardless of the focal length of the lens. Since a longer lens will ...
the_meter413's user avatar
1 vote
2 answers
632 views

How can I cancel aperture resetting between subsequent image shots of a timelapse?

When shooting timelapses, small deviations of aperture position between shots can cause an image to flicker. The most obvious way is buy a lens that doesn't reset aperture on every shot you take. What ...
sanjihan's user avatar
  • 237
4 votes
1 answer
3k views

How do I set the aperture of a Nikon lens when using extension tubes?

I bought extension tubes to do some macro photography. The problem I am facing is that the tubes I got disconnect the aperture from the camera settings. So, I thought I will fix the aperture, ...
sanjihan's user avatar
  • 237
1 vote
5 answers
3k views

Does shooting landscape at lower f-stop produce reasonably sharp images?

This article argues that, 50mm prime lenses, on the other hand, have a maximum aperture of somewhere between f1.2 and f2, letting you hand hold photos in much lower light levels (they also give ...
sherlock's user avatar
  • 683
2 votes
1 answer
128 views

Concert photography settings

Hello all I've just upgraded my Canon 500 D to a 750 D. With that I purchased a Tamron 16-300 mm lens all-around use for daytime trips when I go out in the wheelchair is I am a quadriplegic and it was ...
wheeles's user avatar
  • 21
3 votes
3 answers
1k views

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 ...
bdesham's user avatar
  • 678
1 vote
2 answers
9k views

Why can't I change my Nikon D3200 aperture in Live View? [duplicate]

I removed the lens to show to the shutter release. While putting the lens back on I didn't place it correctly on the first attempt. Also, when I removed the lens, the camera was on and possibly in ...
user54121's user avatar
1 vote
2 answers
744 views

Does a teleconverter lose one stop of light from both ends of a variable aperture zoom?

If I add a Canon 1.4x III extender to my new EF 100-400mm f/4.5-5.6L lens, I believe I lose one stop of light. So what happens to the f/4.5-5.6 part? Does the f/5.6 part become f/8, for example, at ...
jwg's user avatar
  • 11
0 votes
2 answers
3k views

Aperture, Canon Eos 1200D, Am a beginner [duplicate]

If we change aperture..does it affect on lighting conditions? Or only shutter speed affects light..?
learning to hold camera's user avatar
-2 votes
2 answers
2k views

Unable to change aperture setting on dial, so consequently reading poor light [closed]

Nikon d3200 (aperture scale unable to change)
Gary's user avatar
  • 1
2 votes
1 answer
978 views

How does a manual lens know when to adjust the aperture?

When I look through a viewfinder before I take the photo, the lens is "wide open" - at its largest possible aperture (unless the depth of field preview is used). The aperture is adjusted to whatever I ...
fracz's user avatar
  • 125
2 votes
3 answers
355 views

From a user perspective, is a stopped down variable aperture zoom lens equivalent to a constant aperture zoom lens?

Let's say that I have a 24-70 F3.5-4.8 variable aperture zoom lens. If I were to stop down that lens to 4.8, would it then be equivalent to a 24-70 F4.8 constant aperture zoom lens from a user ...
Speldosa's user avatar
  • 131
5 votes
8 answers
4k views

How to take a tunnel photo with a model inside the tunnel?

I recently bought Nikon D7200. A good camera. But I feel a great challenge while taking a photo of a model standing in the middle of the tunnel. The tunnel is short and outside the tunnel is a ...
Maulik V's user avatar
  • 179
0 votes
2 answers
210 views

Does focal length affect coordinate estimation?

I am using a webcam mounted on the ceiling to track some markers. I measured the area on the ground that the webcam is able to see, it is roughly 2.61m x 1.46m. The output of the coordinates right in ...
RunOrVeith's user avatar
5 votes
2 answers
2k views

Why do zooms have small apertures even around 50mm?

A 50mm f/1.8 prime from one of the major manufacturers can easily be found for $200 or less, but zooms that include 50mm in their range always seem to have much smaller apertures even at 50mm until ...
0x5f3759df's user avatar
0 votes
2 answers
2k views

How do I correctly convert from aperture diameter into f-stops?

I'd like to know whether it's possible to convert the radius of the focal point into f-stops properly. The following equation illustrates that the diameter is dependent on the f-stop: $$ \text{...
p2or's user avatar
  • 297
1 vote
2 answers
131 views

When stopped down, does light still pass through all of a glass element behind the aperture blades

When you stop down and look through the lens, the iris (circle of light) gets smaller. Does this mean that light only passes through the middle of each lens element behind the aperture blades? What ...
Alex's user avatar
  • 703
2 votes
1 answer
2k views

Why do DPReview's charts show the G7X II as having an aperture around f/8?

I have a Canon G7X II camera, which has a 24-100mm f/1.8-2.8 lens. Why does DPReview's chart show it having an aperture of around f/8 at a focal length of 100mm?
marioosh's user avatar
  • 167
0 votes
1 answer
594 views

Can you adjust Aperture in [Tv] mode on a PowerShot G7 X?

I do not own a PowerShot G7 X, but my friend does. We want to know if it is possible to adjust the aperture when in [Tv] mode, so that she can try for milky water on a waterfall. Is this possible?
Steve's user avatar
  • 237
0 votes
3 answers
12k views

Why do I get the "Press Shutter Release Button Again" error when my D3200 isn't set to max. aperture?

I know there are quite a few posts out there about the famous "Press Shutter Release Button Again" error. But mine seems to be quite weird. I own a Nikon D3200 with the standard 18-55 mm lens. It ...
TheUnriashol's user avatar
1 vote
3 answers
2k views

tokina at-x pro 100mm f/2.8 macro for Nikon - aperture automatically changes while in manual mode

The max aperture on my Tokina 100mm at-x pro is f/2.8 but when I focus on anything closer than around 9 feet, the aperture automatically starts to close down and get progressively smaller (higher f-...
Eric's user avatar
  • 11
1 vote
6 answers
2k views

Aperture iris in front of lenses (in object space)

This question discusses the iris placed in camera body and this question does not reveal too much details about external iris. I recall from scattered information that I have read that iris placed in ...
Euri Pinhollow's user avatar
0 votes
1 answer
152 views

How can I maximizing dynamic range without postprocessing?

How can I maximize the amount of detail captured in both dark and light objects in the same photo? I don't have the option of post-processing, so "traditional" HDR is not possible. If I reduce ...
RoadieRich's user avatar
0 votes
3 answers
112 views

What all techniques and best practices I should use or improve for these photos? [closed]

I am beginner in photography. These two photos are taken in manual mode and I feel it's perfect shot. Please have a look and let me what all things I should improve and what I shouldn't consider. ...
Miqdad Ali's user avatar
1 vote
1 answer
115 views

Finding the real settings of my camera

I installed the CHDK firmware on my camera. One of the options it has is to show the "true" ISO that any given displayed ISO represents (eg. display ISO 80 is really ISO 45). This got me wondering: ...
Mark's user avatar
  • 856
0 votes
2 answers
277 views

zoom or aperture which one decreases DoF?

When I want to decrease my DoF and have Bokeh in my photos, I always stuck between choosing either opening the aperture or zooming. Should I start zooming or should I decrease the aperture? Edit: I'...
Andrew Ravus's user avatar
0 votes
2 answers
7k views

Does F number stay the same between 35mm and Medium Format?

Rented a medium format camera to see "what is this medium format look" everyone talks about! and evaluate if it is awesome enough to start saving money for it or not. So my own camera is a ...
Brandon's user avatar
  • 2,460
0 votes
1 answer
10k views

Why can't I set the aperture on my Nikon D7200?

I have just recently bought the Nikon D7200 and am having trouble using aperture priority mode. I have been doing exactly what the manual says - I switch the mode to A but when I turn the dial on the ...
user avatar
21 votes
5 answers
5k views

What are the practical advantages of fast lenses when shooting landscapes?

I'm still using my 18-105 kit lens on my Nikon D5300, and the (lower) quality of the photo on edges is bothering me, so I want to get some lens that produces good quality through the whole photo. ...
danizmax's user avatar
  • 477
0 votes
5 answers
14k views

Why doesn't the f-stop on my D7100 change when I hold +/- and change the dial in manual mode?

On my Nikon D7100, the f/stop will not go down from 14 when I hold down the +/- button and turn dial. All I get is a little number below but the photos do not change exposure when I change this number....
Katy Pauls's user avatar
-3 votes
2 answers
684 views

Reverse Engineer this processing in lightroom

Wondering if anyone can put a quick eye on these photos below and share what develop edits in Adobe Lightroom they think could help create a similar style in other photos. These were taken by ...
Graham Zimmerman's user avatar
1 vote
2 answers
3k views

Why my dslr takes more time to process pictures shot at high apertures?

Using the same setting, my 600d takes about 10 secs from flash to preview picture if I shoot with a high aperture of f/22. But if I shoot with the same settings at f/3.5, I can see the picture preview ...
Bar Akiva's user avatar
  • 217
9 votes
2 answers
2k views

Landscapes: why *narrow* aperture?

In an earlier question, several people suggested that for landscape photography, you want a small aperture, “to maximise the depth of field”. I'm not sure I understand that… Surely if you're ...
MathematicalOrchid's user avatar
0 votes
5 answers
2k views

Which smartphone camera would give better low-light picture results?

Just interested in choosing the right smartphone for lowlight photography I have following contenders. Option 1 has 16 MP, Aperture f/1.8, OIS, with sensor size 1/2.6" and 1.12 μm pixel size Option ...
Alex's user avatar
  • 17
4 votes
2 answers
3k views

Why is the Depth of Field Preview button necessary?

I've looked far and wide but i cannot find the answer for this question. I know some older cameras and lenses used to have aperture rings on them, which allowed the user to set how open or closed the ...
Ben Franchuk's user avatar

1
3 4
5
6 7
13