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15
votes
6answers
5k views

How does background blur (bokeh) relate to sensor size?

This is a somewhat theoretical question. Suppose I first take a photo of a subject using a full frame sensor DSLR, with a given lens (say 50mm prime lens at f/3.5). Now suppose I exchange the camera ...
10
votes
3answers
1k views

What type of lens will auto-focus on Nikon bodies without a focus motor?

I know my D40 doesn't have a motor in it to auto-focus lenses. What type of lens has the motor in it? How can I know which lenses will and will not work?
8
votes
4answers
3k views

What is the quantative relation between flash guide number and ISO?

I found that formula on the Internet: Guide Number = (Shooting Distance * Aperture) ÷ ISO Sensitivity Is it correct? If it is could someone please explain why ISO is related to guide number in this ...
8
votes
4answers
6k views

What does 'how much zoom' mean?

I have Canon 18-135 and 70-300 zoom lenses. People ask me how much zoom my camera supports. What am I supposed to tell them? "135 ÷ 18 = 7.5" and "300 ÷ 70 = 4.2"?
5
votes
2answers
2k views

What is the EV scale?

I have seen an "EV" (exposure value) scale that's sometimes used to express a camera's exposure settings, or scene brightness. How exactly does this scale work?
14
votes
6answers
3k views

Is a UV Filter required/recommended for lens protection?

Is it still required/highly recommended that I buy a UV or similar filter to 'protect' the front element of my lens? I ask because this advice has been around for 30 years and you would think that ...
14
votes
3answers
2k views

What causes lens flare?

I heard a couple of years ago that only certain types of lens caused flare to appear, something related with the material and/or quality of the lens. Is this true? Which material/quality caused flare? ...
14
votes
4answers
5k views

When shooting in mRAW or sRAW, how does the camera generate smaller files?

Most mid- and high-end DLSRs offer two or three sizes for RAW capture. When the camera is generating the medium or small sized RAW files, how does it make them smaller? Does it capture less ...
9
votes
6answers
64k views

Why does my Canon DSLR stop recording video automatically?

I have read a few posts related to video recording using a DSLR so I decided to try my 60D for the first time. I've had the camera for about a year and a half but never tried recording a video. ...
9
votes
5answers
2k views

How can I approximate 'soft focus' digitally?

In a previous question about soft lenses, it was suggested that much of the current practices regarding soft focus involve selectively soft focusing certain parts of the image and mattdm suggests its ...
8
votes
9answers
1k views

How do I choose a point and shoot camera under $400?

I need a P&S camera for my family. They would probably use it for family functions,trips etc. I want a camera with flash for taking good night photos with a decent quality. They are not ...
7
votes
3answers
1k views

What is the formula for percent of frame filled at a specific distance and focal length?

I am thinking about buying a new lens specifically to take photos of distant targets (birds, bears, etc). I currently own the Canon 70-300 IS USM, which is a nice lens, but I find that if I want to ...
4
votes
1answer
856 views

How can I calculate the effect of non-TTL flash on exposure?

I recently got an old Canon AE-1 film camera back in working order. I'd like to use my modern 430EXII Speedlight flash with it, however since there is no TTL metering, I have no idea how much the ...
18
votes
3answers
18k views

What is the difference between Canon “L” lenses and non-L lenses?

The Canon L lenses are much more expensive and presumably much better quality than non-L lenses. What makes an "L" lens? How much better are they over a similar length/speed "ordinary" canon lenses?
8
votes
4answers
484 views

Is it possible to take a long exposure photograph during daytime?

I would like to take a picture of a street during the day to depict how much traffic and cars there are on the street. Is there anyway to do this with a long exposure photograph? I have a Nikon D90 ...
6
votes
4answers
1k views

What are the tradeoffs when replacing two zoom lenses with a superzoom?

I have two lens currently for my camera. An AF-S DX VR NIKKOR 18-55mm f/3.5-5.6G (kit lens) and a AF-S DX VR Zoom-NIKKOR 55-200mm f/4-5.6G IF-ED lens. I have found that there are cases when the ...
88
votes
11answers
4k views

How do I approach people for a natural look in street photography?

I am enjoying taking candid photos of people, but the subject is usually someone I know, or it is during some family/friend event, so after a while the people get used to the presence of the camera ...
41
votes
24answers
3k views

What are good photography projects?

I am currently in the middle of a year long photo a day project, and am beginning to think about what I will do once this is done. What types of photography projects have you done? Please keep ...
39
votes
7answers
6k views

What is the best way to synchronize Adobe Lightroom databases between two computers?

What is the best way to synchronize Adobe Lightroom databases between two computers (a desktop and a laptop)? I'd like to be able to edit photos on either machine, and preferably not copy the whole ...
30
votes
3answers
2k views

Unsharp mask - what do the parameters do?

I'm interested in getting into post-processing stuff, and I'm wondering about the Unsharp Mask operation. Specifically, there are 3 parameters involved: amount radius threshold What do these do? ...
38
votes
13answers
8k views

Any good tutorials for learning how to post-process images?

I don't really know where to start with post-processing my images. I normally just straighten, crop and sharpen. Do people know of any good resources on the internet for getting a grip with Photoshop ...
34
votes
5answers
6k views

What should one look for when buying a used lens?

When buying a used lens, what should the buyer check? Other than looking for obvious physical damage on the outside of the lens, what else should be inspected to identify the condition or quality of ...
57
votes
10answers
4k views

How can I get my portrait subjects to look natural and drop the cheesy smile?

I am surprised by how many people automatically put on a cheesy smile when I point a camera in their direction. Please share any tips / techniques / links that might help me get better, more ...
30
votes
6answers
2k views

What is the best technique for long-exposure photography in good light?

Can anyone offer any tips on achieving long exposures (with the intention of blurring water, clouds etc)?
30
votes
6answers
2k views

How can knowledge of human perception of color be used in photography?

How does the human vision system perceive color, and how can/should this be taken into account when taking and post-processing photographs (both in color and in black and white)? The bit above is ...
62
votes
22answers
5k views

What kind of photography is still better done with film cameras?

Are there any kind of photography left today which digital cameras are still in the disadvantage to film cameras?
53
votes
8answers
3k views

Why do some lenses cost 10 times as much when the specs are very close?

For example, a Canon 50mm f/1.8 lens is about US$110, while another Canon 50mm f/1.2 lens is about 14 times as expensive, at about $1450. Is the 1.8 or 1.2 the main reason for the price difference? ...
15
votes
10answers
28k views

Which prime lens for Pentax?

My girlfriend is buying a Pentax K-5 (I already have a Pentax DSLR so we thought it made sense for us to be able to share lenses), and she's not sure about which lens to get with it, so I've been ...
44
votes
4answers
39k views

What is moiré? How can we avoid it?

What is the image defect called "moiré"? What causes it, and how can we avoid or reduce it? Is it related to "false color"?
15
votes
4answers
14k views

How can I avoid star trails without an expensive tracking mount?

I want to take pictures of the Milky Way or a lunar eclipse or earth glow on the moon, but I don't have an equatorial tracking mount, and don't want to spend that much money on one. How can I get ...
14
votes
7answers
11k views

How do I properly do shadowless product photos?

My friend asked me to create a photo like this. I noticed that its shadowless and my first question is whether it was setup to be shadowless, or was it made shadowless in post? How many lights are ...
39
votes
6answers
2k views

Is crop-factor a bad thing?

It seems to me that there is a preference for full-frame sensors rather than cropped sensors, and I'm curious as to why. It seems to me, that the cropped sensor means that I get more bang for my buck ...
37
votes
4answers
4k views

How can I get photos showing the “shaft of light” effect?

I would like to be able to capture a photo which shows light shafts coming through the window. A famous example is this: I'm guessing this involves a tripod, a long exposure and strong sunlight, ...
31
votes
8answers
8k views

What's the difference between Adobe RGB and sRGB and which should I set in my camera?

In my Canon 60D, there's a setting between Adobe RGB and sRGB. What's the difference and what should I prefer when shooting to RAW ?
20
votes
4answers
1k views

What is ETTR (Expose To The Right)?

Picking up from this answer and this question, What exactly is ETTR? How it may reduce the image noise? And how is it difference from film to digital sensors? In the answer linked above, what are the ...
19
votes
3answers
6k views

How does the human eye compare to modern cameras and lenses?

A goal in most photography is to present a scene which resembles what a person who had been there at that moment would have seen. Even when intentionally working outside of that, human vision is the ...
17
votes
2answers
7k views

What is T-number / T-stop?

Usually, when discussing aperture of a lens, F-stop and F-number are used for quantifying. But some photographers, and especially videographers, also mention T-stop. The concept and numbering used ...
13
votes
8answers
4k views

How I could take crisp sharp shots without expensive lens?

Recently I bought my first DSLR camera. It is a beginner's one, a Sony alpha 230 kit. To tell the truth, my shots are not more crisp than those I used to take with my old Point and Shoot Nikon ...
32
votes
8answers
4k views

Do I really need a fast 50mm lens?

Everyone I speak to says that a 50mm lens is the best and beats them all as an all-rounder. I was wondering whether to get myself a decent, fast 50mm as well. However I'm still not 100% sure whether I ...
23
votes
5answers
32k views

Why does fungus form in lenses, and how to get rid of it?

Recently I was using an old Pentax 50mm f/2 that had a quite big green spot, and later I was informed that it was a fungus. A couple of questions raised from this: Why does fungus form inside the ...
20
votes
6answers
976 views

How do I manage good photos of babies and kids?

Apart from the strain they create by not sitting in one place while in photo shoot, kids do make nice subjects for pictures. I have been trying various scenes, props, etc., to get the best out of my ...
19
votes
5answers
4k views

How do I set up a home portrait studio area in zero space?

I live in a small urban apartment with my wife, two children, two cats, a goat, and a flock of chickens. Or, at least it feels like that sometimes. I'd like to set up an area for basic portrait ...
16
votes
2answers
2k views

How are virtual tour photos taken?

I am currently working to design a flash virtual tour, but I know little about how the photographs are taken. Ideally I'd like to be able to take a set of 6 shots from a single focal point, and be ...
16
votes
6answers
2k views

Which scenarios are better shot with a prime lens versus zoom lens or macro lens?

What scenarios are better shot with a prime lens? A zoom lens? A macro lens?
14
votes
9answers
15k views

Why is Aperture changing the color of my RAW photos?

For some strange reason, Aperture 3 seems to shift the colors of the raw images, after importing them. For example, the reds become washed out and something not red. In the following example, the red ...
25
votes
4answers
2k views

Do I lose anything converting to DNG?

I'd like to convert all my ARW (Sony) files to DNG for several reasons, but the only thing keeping me back from doing it is the fear of losing useful metadata during the conversion. I know that the ...
20
votes
10answers
3k views

Is the iPhone 4S camera good enough to serve as one's “everyday-carry”?

I'd like to have a camera with me at all times, but my DSLR is often too bulky. For some time now, I have tried cell phones as a compact camera substitutes, but with limited success. Often, the ...
19
votes
4answers
763 views

What should I consider when purchasing a macro lens?

What should I be aware of when buying a macro lens (other than that it will fit my camera)? What features should I look for? What specs should I pay close attention to? What factors affect macro ...
17
votes
4answers
2k views

When is it OK to place the subject in the middle of a picture?

When is it OK to place the subject in the middle of a picture? I took this picture and feel very compelled to put the subject in the centre rather than on the sides.
16
votes
6answers
9k views

Why can't I get a decent white background with product photgraphy?

I'm a new photographer, and I'm trying to take photos of a product with a pure white background (#ffffff). I'm using a light box (something like this one), so my lighting should be solid. But I ...

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