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4
votes
2answers
3k views

Does wide angle equivalent in crop sensor skew image?

I see many posts on both this forum and elsewhere the discuss the use of a wide angle on a crop sensor. For example, they discuss how at 14mm lens is 14mm on a 35mm film or full frame, but with a 1....
54
votes
23answers
40k views

How can I backup my RAW photos while travelling without Internet access?

This question seems similar to this one, but my needs are different : I shoot in RAW exclusively I'm looking for a 100% offline solution: while traveling, Internet won't be accessible the "laptop" ...
46
votes
7answers
83k views

Is it better to shoot with a higher ISO, or use lower ISO and raise the exposure in post-processing?

Suppose there are two photos taken in the following scenario: Scenario 1 - Photo taken using ISO of 3200. Scenario 2 - Photo taken using ISO of 100. Both photos are taken in a medium light scenario....
18
votes
3answers
3k views

What is HDR photography?

What is HDR photography, and when might it be useful?
30
votes
5answers
30k views

Why does my Lightroom/Photoshop preview change after loading?

Everybody who is using Lightroom probably has seen this. After importing RAW files, Lightroom shows a preview, but contrast and color of the preview change after a few short seconds to a slightly ...
30
votes
8answers
5k views

Is high ISO useful for photography?

I started photography sometime back, and always wondered when is high ISO handy in photography? Also can it be used to get any special effect in pictures? My camera has Max ISO of 800 but I see some ...
9
votes
1answer
1k views

What lens characteristics are important in star photography?

In optimal world I would buy a lens that is good in every way. But I'm on a budget and have to find a balance in quality and price. I'm looking for a lens for star photography, so in my case it will ...
11
votes
3answers
13k views

What does an expensive flash unit buy over a cheap one?

General question: What will I get from an expensive flash unit, that I can't get from a cheap one? Specific example: The $250 Canon Speedlite 430EX II vs. the $50 Neewer TT560. To my naive eye, the ...
34
votes
8answers
26k views

Technically, why is the out of focus area blurred more when using a bigger aperture?

I'm wondering, technically, why and how does the out of focus areas blur more when using a bigger aperture. I think it'd help a lot if I presented a problem that's been driving me nuts for a long time:...
30
votes
3answers
4k views

What is the meaning of “white balance”?

I would like to understand the term white balance. My camera has settings for white balance with the following options: Auto white balance Daylight Cloudy Shade Flash Incandescent lights White set1 / ...
42
votes
5answers
131k views

How many actuations are “too many actuations”?

When looking at used camera bodies, a question that comes up a lot, is "how many shutter actuations, or clicks, does it have?" What I am wondering is, how many is too many. In other words, is there ...
38
votes
8answers
11k views

Why do people recommend 50mm or other prime lenses as starting lenses for learning photography?

I've seen quite a few people recommend the 50mm prime lenses, in particular the sub-$100 50mm/f1.8, as a starting lens for photographers (especially because they're likely to be using cameras with ...
31
votes
2answers
26k 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 (e....
39
votes
5answers
8k views

What is the difference between a linear and a circular polarizer?

When I bought my polarizer, a friend told me that I should get a circular one, because the linear ones can mess with the autofocus. Is this true? What should each be used for?
20
votes
8answers
50k views

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

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 can'...
28
votes
2answers
4k views

Why use a small aperture when trying to see sensor dust?

Here and there I read of people who set their lens to a small aperture while testing their sensor cleanness, supposedly to get the best image of dust speckles. However, the image of the on-sensor dust ...
18
votes
8answers
5k 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 ...
7
votes
6answers
2k views

Does sensor size impact the diffraction limit of a lens?

My understanding of diffraction, is that with a small aperture the 'airy disk' (which I understand is the pattern light from a given direction relative to the lens will form on passing through the ...
33
votes
5answers
32k views

How can I calculate what the effect of an extension tube will be?

There must be a mathematical description of the difference that an extension tube makes to a lens -- is it something that can be easily described? (For example, with teleconverters you can say things ...
28
votes
4answers
23k views

When should you use a normal flash vs a second-curtain flash?

There have been many questions lately that focus on improving the quality of the image taken, where the answers circle around using a second-curtain flash to reduce blur and freeze motion. Why not ...
26
votes
6answers
3k 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 ...
20
votes
5answers
11k views

What is a rolling shutter? When do I have to be aware of it?

In answer to another question, Adam Davis writes: Your camera complicates this by using a rolling shutter above a given speed (usually around 1/200. This means that only a portion of the ...
25
votes
9answers
5k views

Prime lens or flash: which upgrade will most improve baby photos?

I current own a Nikon D5000 with kit lens (18-55mm f/3.5-5.6) and am looking to take better indoor photos of my fast-moving 9-month-old, which sometimes come out blurred or not natural I use the on-...
21
votes
4answers
4k views

What is GAS and how can I avoid it?

What is this GAS that all the pros talk about? It sounds pretty bad. How do I avoid it? Is there a cure?
12
votes
3answers
4k 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 ...
8
votes
2answers
5k views

How do I set exposure with a manual flash?

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 ...
26
votes
5answers
7k views

Why is the depth-of-field preview in the optical viewfinder of my Canon 500D inaccurate?

I have noticed that in my Canon 500D, the depth-of-field preview in the optical viewfinder is inaccurate with large aperture settings. If I press the DoF preview button, there is very little ...
27
votes
7answers
3k views

What exactly is flash sync speed, and should it be a factor in a buying decision?

What exactly is flash sync speed and should it be a factor in a buying decision?
15
votes
7answers
8k views

What is a normal lens?

I've heard people call 50mm lenses "normal lenses". For a lens to be considered normal, does it have to be exactly 50mm or is there some leeway? Does the normal focal length depend on crop factor of ...
2
votes
2answers
1k views

Is there a good remote timer compatible with most Nikon and Canon (and Pentax and Sony) cameras?

I wish to experiment with HDR night photography and timelapse video editing. Both require me to take multiple shots are regular intervals for prolonged durations, and I obviously do not wish to sit ...
3
votes
2answers
2k views

is uv filter a must? [duplicate]

I am using panasonic 25mm 1.7 lens in olympus omd-em10 ii body. Neither of them have a uv coating. Will it hurt lens/processor health if I use it without filter?
35
votes
7answers
22k views

How do I capture the milky way?

Can the milky way actually be photographed like this? I know the image is manipulated, and is probably a composite, but how do you capture such contrast in the milky way? Is an equitorially mounted ...
50
votes
16answers
23k views

Which tools are good for creating panoramas/stitching multiple photos?

Can anyone recommend some good tools for creating panoramas from multiple photos. (Free and commercial) Personally I use either Windows and Ubuntu, but I'm not fussy, suggestions for other platforms ...
76
votes
15answers
18k views

How does one focus for landscape photos in very dark conditions?

Tonight I tried my best to take some night landscapes in the darkest of dark conditions. Hoping for an epic composition of the Milky Way and a landmark. Of course, none of my glass could auto focus ...
44
votes
5answers
16k views

What does it mean for a photograph to be “high key”?

As I learned the term, a high-key image is one where the shadows are effectively eliminated, and the mid-tone detail pushed into brighter zones. My question is simple: is this an accurate definition, ...
42
votes
3answers
33k views

Why is a 1" sensor actually 13.2 × 8.8mm?

I'm wondering how sensor sizes are calculated. The Sony RX100 reportedly has a sensor size of 1" which is 13.2 x 8.8 mm according to the press release and various sites. How does that work? That's a ...
12
votes
4answers
18k 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?
48
votes
3answers
394k views

What does STM mean on a Canon lens?

The Canon EF 40mm f/2.8 has a designation of STM on the lens. What does this mean? What are the advantages of having it and does it replace an older technology? We have a terminology thread that ...
7
votes
2answers
4k views

Are Yongnuo flashes interchangeable between dslr's or are they brand specific?

I see the Yongnuo triggers are brand specific. For example YN-622c (for Canon) and the YN-622n (for Nikon) I was looking at the YN-565 and YN-568 but did not want to make a wrong purchase and buy a ...
14
votes
7answers
4k views

How to know you've outgrown your equipment?

I have only started shooting recently, as a hobby. I use Canon EOS M100. I use a EF to EF-M adapter to use EF 50mm f/1.2L USM. The camera seems to have trouble focusing and light metering (with auto ...
4
votes
4answers
3k views

How to make camera LCD show true RAW data in JPG preview and histogram?

With Canon 650D (and presumably all the other Canon), I noticed that the picture style and full JPG processing is used to generate a review JPEG which is what the camera actually reads when reviewing ...
59
votes
17answers
4k views

What are the first few photography books someone should read? [closed]

The books that helped me most initially were the Bryan Peterson books and more recently the Joe McNally books. Both of these working photographers give a lot of honest and helpful examples. These ...
68
votes
6answers
14k views

Why are wide-angle lenses so much more expensive?

What is it about wide-angle lenses that makes them so much more expensive than an equivalent-quality tele or prime lens? Take the Canon EF-S 10-22mm USM, for example. RRP is nearly £1,000! Are they ...
30
votes
2answers
7k views

How does exposure fusion work?

I understand that "exposure fusion" is a method for combining different exposures into a single image. How exactly does it work, and how is it related to HDR?
43
votes
5answers
7k views

When best to use Multi-Zone/Matrix, Spot, or Center-Weight exposure metering modes?

What are Multi-Zone/Matrix metering, Center-Weighted metering, and Spot metering? What about Partial? Is there a good rule of thumb, or a few pointers, on when best to use each exposure metering mode?...
34
votes
4answers
7k views

How do you find out the “sweet spot” of a lens?

I've tried googling this, but have never found a satisfactory answer. I've heard the term "sweet spot" thrown around by some photographers to mean the f-stop of a lens which results in the highest ...
37
votes
9answers
33k views

How to nail focus for DSLR astrophotography?

I've been doing a bit of astrophotography and the problem that I almost always have is nailing focus. I'll manually focus on a bright star or the moon (which hopefully isn't an option!) by magnifying ...
20
votes
5answers
105k views

How can I upscale a low-res image to make it appear higher-res?

I want to enlarge an image to a bigger size. This will cause pixelation. So I want to apply some treatment to it in Photoshop that will suppress some of this pixelation. Of course I cannot generate ...
75
votes
16answers
30k views

Is it lenses which make your photographs, not camera bodies?

I read somewhere on this site itself that you should spend more on your lenses and less on your camera bodies. Is it a myth or a fact that mostly it is the lenses which make your photographs not the ...
27
votes
10answers
8k views

How do I choose a polarizer?

It was suggested that I should get myself a polarizer filter to get over my reflection problem. ( How to avoid reflection when taking a picture of a ceramic object with a shiny glaze? ) I found out ...

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