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44 votes
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What is this physical filter, shaped like a shallow pyramid?

It looks like a multi-image, aka kaleidoscope filter - specifically a Cokin #201 - I can't tell whether it's an A or a P; they're the same but different sizes. I can't find any reference to it any ...
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32 votes

Do smartphones suffer from degrees of chromatic aberration? If so, how is it possible?

Because the chromatic aberrations happen in the lens, not the sensor - the picture is already distorted by the time it reaches the sensor, so it doesn't matter if there is a Bayer matrix (or any other ...
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  • 19.7k
31 votes

Does using long exposure together with ND filter make the scene look more evenly lit?

No, changing the exposure or using an ND filter will not help you with this, since both will only brighten or darken everything by a certain factor. Your problem is the large relative difference ...
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30 votes

Is there a black and white physical filter?

Pardon me while I get a little metaphysical for a bit. "Color" as we understand it isn't a real property of anything in the universe. It's something created by our vision system — a complicated ...
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  • 140k
29 votes
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Why did my ND filter produce washed out exposures?

You've got the sun almost in the frame. This is causing huge amounts of veiling flare — light bouncing all around, reducing contrast. You'll get better results from a different angle, or at a ...
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  • 140k
28 votes
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Front element shattered, can I have my lens repaired?

I have the same lens. Your front element is not broken From your photo it looks like only a protective filter (UV?) broke. Notice the letters saying "16-35mm". They are printed on the ...
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  • 1,123
25 votes
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How can I make a photo with blurred people but a sharp background?

What you are looking for is a ND (Neutral Density) filter. To illustrate, here is an example of a photo taken in daylight in a street with a ND1000 filter. The filter allowed a shutter speed of 6 ...
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  • 4,103
23 votes
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What's the difference between "Fake HDR" and real, bracketed exposure HDR?

What's the difference between “Fake HDR” and real, bracketed exposure HDR? The only difference is how broadly or narrowly you decide to define the term High Dynamic Range Imaging (HDR). Do you use ...
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  • 167k
21 votes
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Why do polarising filters only work in one direction?

You're probably comparing a linear polariser with a circular polariser. The linear polariser is a basic filter that only passes light waves polarised in a particular direction. That works either way ...
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  • 2,903
20 votes
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How can I take a long-time exposure of water without a grey filter?

You can merge multiple short exposure photos into a single long exposure image. There are a lot of tutorials on the net, for example: https://www.youtube.com/watch?v=nAuQWfS3pLg Basically, he opens ...
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  • 4,825
20 votes
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Can I stack ND Filter and Polarizer together?

Absolutely you can. Many square filter holders are specifically designed for this: The Lee Filters systems (Sev5n, 100mm) have optional front threaded rings designed to hold a polarizer in front of ...
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  • 31k
19 votes

Hour long exposure of the sun

that purple haze is probably a color cast caused by the glass itself; the welders glass often isn't neutral color. you should be looking at solar filters, or very dark (and probably stacked) ND ...
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  • 9,166
19 votes
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Is there a black and white physical filter?

No. It is not possible to create a physical filter that can completely "De-saturate" incoming light. The only way to achieve this without post-processing is at the film / sensor level.
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18 votes
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What kind of filter do I need for safe sun photography?

You need more than an ND filter and a polarizer. You need a solar filter specifically designed for imaging the sun. The danger to your eyes and camera are very real if you are pointing the unprotected ...
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  • 167k
18 votes
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Hardware / post for crisp sunrise

[SAFETY WARNING: You should never image the sun with anything approaching a telephoto lens when it is more than about 10° above the horizon without a solar filter that not only protects against ...
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  • 167k
17 votes

How do I remove a broken/warped UV filter from my lens?

If the rubber band or filter wrench doesn't work, the next step is a precision band saw. If Adam Savage (the guy in the video) and his band saw is not available, you could also use a needle file or ...
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  • 167k
16 votes

Is there a black and white physical filter?

All color is a result of software processing. The only thing a sensor, be it film or semiconductor, can do is change state in response to incoming photons. Yes, a digital camera has color filters, ...
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15 votes
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What is a good example for artistic ND filter applications?

Aside from moving water, what other motion blur applications can one achieve with an ND filter? Pretty much anything that moves in relation to the camera. One can make people moving through a scene ...
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  • 167k
14 votes

Should I go digital or analog for B/W on a budget?

For the budget? Go digital, but don't worry about those monochrome sensors. Sure, they're strictly better in terms of per-pixel awesomeness, but even entry-level DSLRs and mirrorless cameras have high ...
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  • 140k
14 votes

How can I make a photo with blurred people but a sharp background?

Apart from using an ND filter, you might be able to achieve the desired effect by taking multiple photos and then blending them in post processing. Either an automatic blend with "ghost removal" might ...
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  • 6,770
14 votes

Why did my ND filter produce washed out exposures?

Why did my ND filter produce washed out exposures? You're shooting straight into the sun with a dirty, unshaded, and flat surface on the front of your lens. The image demonstrates all three classic ...
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  • 167k
14 votes
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Are polarizers effective against reflections from glass?

CPL filters do not differ in their photographic properties from linear polarisers; they are merely friendlier to metering and autofocus. But in essence they are just linear polarisers with a ...
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  • 1,036
14 votes

Are polarizers effective against reflections from glass?

Yes. Here's an example image with very similar conditions to the post you linked to. In this case they are using a circular polarizing filter: Shown in The Mighty Circular Polarizing Filter Explained ...
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14 votes
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What ND filter strength should I use when visiting Iceland?

That is a really tough question because it is so situation dependent. It depends on the look you want to achieve and also the light that you are facing. You almost always have the wrong filter with ...
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  • 1,493
13 votes
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Why does Rosco's filter page show that 33% transmission is 1 stop rather than 50%?

If you look at filter #209 you'll see "Reduces light 1 stop (Transmission = 51%)". That is what you expect to see. Filter #210 reduces light 2 stops and has transmission of 24%. Again, what you expect....
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  • 1,749
13 votes
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Why is the IR filter present when there is already the Bayer filter on an image sensor?

The Bayer filter passbands are designed to be make the sensor have a reasonable match to the human eye, while not costing too much. They're fairly leaky even in the visible part of their stop band, ...
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  • 3,602
12 votes
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Will polarizing filter or UV filter address those reflections?

No. Adding filters will only make this worse. The reflection in your picture is not actually in the scene, so there is nothing a filter can get rid of. The ghost image is caused by reflection ...
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12 votes

Is there a black and white physical filter?

You can't add a physical filter, but you can remove a physical filter to convert any digital camera to a strictly monochrome camera. The actual sensor on any DSLR knows nothing about color - each ...
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