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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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61 views

what is the camera fstop and lens fstop correlation? [duplicate]

my sigma 50-500mm DG lens has range of f 4.5 - f 6.3, but in my Canon 70D camera I can still set fstop to 22 in manual mode. 1)How these two correlate? 2)Would a f22 setting in camera will have no ...
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1answer
108 views

What is the -5 to +5 scale below the aperture number on the back of my Canon DSLR?

Hello guys, I am completely new on this photography world and honestly I don't have much knowledge about it, but I really want to learn... and read. I've been reading about modes, light, shutter ...
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2answers
84 views

How do shutter speed, ISO and aperture work together to control exposure?

When shooting in natural or ambient artificial light (without flash, basically), how do light, shutter speed, ISO and aperture work together to control exposure?
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3answers
111 views

Why should I use the widest aperture for star photography?

Well, this question may sound dumb to some folks but I am really confused here. I was reading this article about Photographing Stars Using a Kit Lens where author talks about keeping widest aperture ...
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1answer
68 views

Graininess and lack of detail [duplicate]

Hello fellow lens loving junkies! I have been struggling to get very sharp, non-grainy images. I have a Canon Rebel Eos T3i. Even images at 100 ISO are not as sharp as I would like. Not sure if it is ...
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0answers
69 views

Scrum photo technique

I remember seeing some photos taken of children which had been staged by getting the kids to form a rugby scrum - all in a circle with arms around each others shoulder and leaning in to look at the ...
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1answer
79 views

Technique to manually set aperture and focus for a low light scene during normally lit time of day?

I have a scenario that requires manually setting the aperture and focus on a lens attached to a machine vision camera on an outdoor scene (mirrorless camera with global shutter). I need to manually ...
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1answer
42 views

What is the effect of changing the Aperture [duplicate]

What is the effect of changing the Aperture on the quality of the image?
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0answers
46 views

Achieving Bokeh using Aperture vs Focus Point [duplicate]

In terms of the bokeh aesthetic, is using a wide aperture the same as using a narrow aperture and focusing on a foreground object? Are there advantages of doing it one way or the other? I took this ...
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2answers
74 views

Why change to open-aperture metering when this causes the need to stop-down for old lenses

On my Pentax ME Super with a legacy lens (Pentax SMC 50mm 1.7) my camera meters at all aperture ring settings. Yet, if I transfer this lens to a modern Pentax DSLR, I need to stop down the lens to ...
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2answers
55 views

How can I further decrease the exposure in a studio environment?

I was trying a few things yesterday involving a studio backdrop which was lit using a grid to provide a gradient effect and a subject about 3ft in front of it, with its own lighting through umbrellas. ...
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1answer
39 views

How can I set the aperture in A mode with a D lens on my Nikon D90?

I use Nikon 35mm f/2d lense on my Nikon D90 but I am unable to change aperture of lens. I have the aperture on the lens set to f22 and locked, I can change aperture with the buttons and the change is ...
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0answers
30 views

For the same attainable sensitivity, how does DOF depend on sensor size? [duplicate]

It's well known that all other settings being the same, larger sensor translates into a shallower DOF. However, for the same number of pixels, doubling linear size of the sensor size would quadruple ...
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3answers
189 views

Why doesn't a drastic change in aperture seem to have an effect on this city skyline photo?

I rarely have time to get out from large city, so large buildings are the main theme of my photos. I still wonder if using the Manual mode instead of Auto in my D5100 can give any benefit. I made two ...
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0answers
62 views

Apertures required to enable autofocus on Rebel T6s/T6i in Live View?

Your article "What apertures are required to enable autofocus, including cross-type or high-precision focusing, on Canon DSLR cameras?" is most useful. Would the new Canon autofocus technology, in the ...
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1answer
123 views

Which Low light zoom lens with image stabilization for DSLR [closed]

Recently started doing some DSLR videos for a website. For testing purposes I got a t5i with Sigma 50mm 1.4F lens. Most videos are in low-light settings. I've been using a tripod and it's worked ...
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2answers
421 views

How does physical aperture size relate to f/stop?

There are two lenses on the market I am comparing AF Micro-Nikkor 60mm f/2.8D AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED If I use the formula for calculating apertures of both the lenses I will use ...
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0answers
52 views

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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1answer
472 views

Why does the Fujifilm X30 limit shutter speed limit in aperture priority mode?

According to FujiFilm X30 specs: Shutter speed: (Auto mode) 1/4 sec. to 1/4000* sec. , (All other modes) 30 sec. to 1/4000* sec. * 1/4000sec. at small aperture, 1/1000sec. at full aperture In ...
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0answers
25 views

How does using a teleconverter affect the aperture of a lens? [duplicate]

I have hear that a teleconverter affects the apperture of a lens. But I don´t know how to calculate it. Is there a formula to calculate how much will a 1.5X or 2X teleconverter affect apperture?
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2answers
123 views

Why does my lens refocus when the f-stop is changed?

I have a prime Sigma f1.4 50mm lens on my Nikon D90 in P mode and focus mode on a set point of the field and notice that when I am using a tripod and change the f-stop that the camera changes the ...
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1answer
1k views

Why do my photos appear grainy when taken at the widest aperture?

I have a Nikon d5000 and just purchased a Tokina 11-16 lens. I was taking picture of a dog 1-2 meters away during winter at mid day today. Using the aperture priority setting, I set the camera to ISO ...
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1answer
36 views

Photos Imported into Aperture Aren't Showing Up

I imported about 500 images into Aperture (mostly CR2, but some jpg), and for some reason they're not showing up in my library. If I right click on my library and select "Show Package Contents" and ...
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0answers
50 views

Why does the exif data show a max aperture 1.6 when I am using a f/1.8 lens? [duplicate]

I am looking at exif data of one of my image that i took with Nikon 35mm f/1.8 lens. While the exif information of my actual aperture is correct, max aperture displayed is 1.6 for the lens which is ...
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1answer
222 views

Why does my camera insist that my Nikon 50mm f1.8 be locked at its lowest aperture setting?

I just got this lens and I really love it, but I can't seem to figure out why it will only take pictures at f/1.8. If I attempt to change the lens aperture setting, it says the aperture must be set at ...
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3answers
176 views

How can I shoot with a fast aperture in sunlight?

I have Nikon D7000 with 50 mm lens and like to shoot my family with 1.8 aperture. But, in sunlight it looks so bright. I am a beginner and had try to increase the shutter speed in manual but it's ...
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1answer
86 views

Do mobile cameras ever vary f stops?

I've been trying to get my head around the camera in my newly-bought Chinese mobile phone. I wonder how focusing actually works in these kind of phones. I imagine that in the standard context of ...
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0answers
47 views

Mechanical Aperture Control Adapter for my Nikkor lenses

I have the following lenses --- AF-S NIKKOR 18-70 mm 1:3.5-4.5G ED AF-S MICRO NIKKOR 105 mm 1:2.8G And I use it for High Speed Videography mainly. Since these lenses have no mechanical aperture ...
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2answers
115 views

How can I know how far the in focus area extends [duplicate]

I know when for example camera is on f2.8 it means an area in front and back of the place that focus is, will be in focus and areas closer or farther will be out of focus, but if it is for example ...
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1answer
435 views

Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length?

Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length (the kit lens for my T3i)? I'm looking for a cheap lens that offers a wide ...
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1answer
187 views

Nikon D7000 thinks aperture of non-cpu lens is always 16 and overexposes photos

I have a non-cpu lens with manual aperture control (I use the aperture ring to set it, and it stays that way when I shoot). My D7000 used to work fine with this lens in A mode - all images were ...
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4answers
216 views

Is it possible to get smaller aperture with diaphragm in front of the lens?

My camera has narrowest aperture of f8. To increase depth of field, could I place an opaque "filter" or lens-cap with a small hole, e.g. 12 mm for f16, on the lens? I realize that at short f.l. the ...
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0answers
111 views

How does the Tamron 70-200mm F/2.8 without VR/IS compare to the Nikon 70-300mm F/4.5-5.6 VR?

I'm looking at two different lenses. The Tamron AF 70-200mm f/2.8 Di LD IF Macro Lens. ...
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1answer
137 views

How are aperture changes implemented on D-series Nikkor lenses?

Nikkor G lenses have a built-in USM motor that permits auto-focusing on bodies with or without the focus motor. They also permit changing the aperture from the aperture dial on the body. Nikkor G ...
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2answers
503 views

Is using a large aperture with flash uncommon?

I found How can I use wide aperture with fill flash? and How can I use flash with large apertures? while trying to find a solution for using a large aperture to get DOF with the flash setup I have. ...
2
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2answers
368 views

Which lens for a milky way photo

I have a Nikon D7000 and don't know whether my 50mm 1.4 or 17-55m 2.8 lens would be better. I was automatically going to go with the 50mm lens, but then I was reading up on how I can use a longer ...
3
votes
1answer
94 views

How do I set the aperture on my Canon camera with an old Zuiko lens mounted with an adapter?

I recently bought an adapter to make the om-system mount of my Olympus Zuiko 50mm f/1.8 fit my Canon 60D. I experimented a bit shooting in Av, but still don't get how the setting given to the aperture ...
2
votes
2answers
303 views

I don't see the hole in the lens getting bigger or smaller, so is it damaged?

Just started learning photography and ordered a 35mm f1.8G ED Nikon lens. I understand it is a prime lens, and doesn't zoom in or out, but the f number there doesn't show any change from 1.8 when I ...
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2answers
222 views

Why are lens apertures usually 1.4, 1.8, 2.8, 4…? [duplicate]

Why are lens apertures usually of only certain sizes? 1.4, 1.8, 2.8 and so on. Why not 1.6, 2.5 or any other sizes?
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2answers
341 views

Nikon d7000 change aperture while shooting video [closed]

I have nikon d7000 and I thought until today that I can't change aperture on the fly. Here is what I found . Go to shooting menu -> movie settings -> and set manual movie settings to OFF This allows ...
3
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1answer
190 views

What are these green numbers on my Canonet’s aperture scale?

There are three green numbers on my Canonet QL19’s aperture scale: The numbers are 28, 20, and 14. What are those?
0
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1answer
185 views

Nikon Lens - Stopping down causes over exposure in Aperture Priority mode

I just got a used Nikon 300mm f/4 AF (the older, non-AF-S version), and unmounted, when set to f/4, the aperture blades are still slightly visible (you can push the aperture lever on the lens a bit to ...
5
votes
2answers
680 views

Why are large zoom ratio constant apertures lenses not generally available?

I know about 17-55 f2.8 and the likes of it, but I am talking about something say 18-135 f2.8. There exists 70-200mm f2.8 and the range (200-70 = 130mm) is much bigger than in 18-135. I am aware of ...
3
votes
1answer
196 views

Sharp, in focus portraits - analyse an example please

I have tried taking a few portraits in my living room, using studio flash. I'm still new to it, so my lighting setups may not be great. I have found sometimes that I can shoot 3 or 4 shots in a row - ...
6
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5answers
742 views

What is the benefit of a wide-aperture lens if you stop it down?

As an example, say you have two lenses: 300mm, f/2.8 being used at f/8 300mm, f/4 being used at f/8 My understanding is that by definition the amount of light coming through the aperture means that ...
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votes
1answer
156 views

How does a modern DSLR camera and lens actually adjust its aperture

I understand what aperture is and how it applies to photography. Larger F number = less light but more depth of focus, smaller F number = more light but less depth of focus. On an older Nikon lens ...
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votes
3answers
184 views

How can I better take indoor photographs with wide aperture and low light?

Recently I photographed an event for a friend as a favour using my Canon 750D, my 18-55mm stock and the 50mm f/1.8. The event was indoors, followed briefly by outdoors and then back indoors in a ...
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0answers
54 views

Difference between shutter speed, iso and Aperture [duplicate]

What are the main differences between shutter speed , iso and aperture? 1.How are they interdependent? 2.Because every three of them are controlling the light,it gets very confusing how? ...
2
votes
1answer
140 views

Why isn't the aperture visibly changing on my lens when it appears like it is changing on my camera?

I own a Nikon d5300 camera and I recently purchased a Nikon 200mm f/4.0D ED-IF Micro-Nikkor lens for close-up photography. When I was testing it out today, I was shooting at f22, and my shots looked ...
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3answers
458 views

Do I use the crop factor in calculating aperture size and area?

How do I calculate the aperture size and area, considering an 35mm equivalent focal length value and non-equivalent aperture f-number (in terms of exposure, no multiplication of the crop factor of the ...