FAQ – Long Exposure Photography
The first in a series of FAQ’s on a variety of topics but always related to Black and White fine art photography. A collection of questions I’ve received over the years and that I’ve always answered to, and still keep responding to. So it’s about time to publish them in a series. If you’d like to see any questions answered that you think might be a great help to others as well, then just write them down in the comment/reply boxes below, I’ll collect them and publish the answers. First FAQ is about long exposures. Next will be a FAQ on BW post-processing and a FAQ on post-processing with Silver Efex Pro 2. Followed by even more, depending on your questions.
Joel Tjintjelaar
FAQ – Long Exposures.
Seriously, this is a question people often ask me. And there’s not just one answer but in my case it has everything to do with creating a mysterious, surreal atmosphere. About visualizing the invisible. An extended exposure can reveal to the eye what was visible to the mind’s eye only. That’s why I love long exposure photography: I want to reveal what my mind’s eye sees. Good question. Careful preparation is an important aspect of my photography since also my time is very limited and the nature of long photography is such that every shot matters. What I usually do is scout a location I find particularly interesting by using Google maps and/or Google Earth and just zoom in and look at it from various view points. At the same time I will search the Internet for photos of the environment and I try to find as many photos of a certain object in the area as I can possibly find. But not only photos, I also try to find other information in Wikipedia or any other source of a certain area or building I want to shoot. I also never forget to check the tides if I go out shooting seascapes. The type of location I find particularly interesting is based on my preference on a certain moment, often triggered by a photo I just saw on the Internet or a story I just read, you name it. This type of scouting and preparation usually takes me a few hours, sometimes even a few days but by the time I actually arrive at the location I just know where to go to, where to stand, what the ideal position is. Before actually travelling off to the planned location make sure to check the latest weather forecasts! I know the problem and unfortunately I don’t have any special tricks. It’s all a matter of being accurate and disciplined I’m afraid. And I guess I have the same workflow as any other LE photographer:
So you see nothing special, just try to be as meticulous and disciplined as you can be That’s a very good question. After you’ve calculated the exposure time I always add 30 to 50% exposure time, even in more stable light conditions. Without getting too technical about this there are some factors you always have to take into account. These are described in one of the tutorials on this website. But if light is changing rapidly, close to sunset for example, then often I just double the exposure time. My bridge-vanishing-in-the-fog shot for example was calculated at 256 seconds and it was getting dark rapidly and there was a heavy fog. So I just doubled the exposure time during the shot. This is all a matter of experience I guess especially in dynamic light conditions. But for more stable light conditions adding 30 to 50% exposure time is a good rule of thumb. There’s not one answer to this, it all depends on the situation, the weather conditions, your personal preference, the type of photography you do and what you have available in terms of equipment at the time you’re shooting. In my case all these factors play a role in my aperture choice. But in general if you’re shooting landscapes you don’t want to have a small depth of field so you should choose a smaller aperture, for example anything higher than f/8. And in fact f/8 in general would give you the best sharpness for almost any lens. The thing is that shooting longer exposures will often require shooting with smaller apertures up to f/22 to increase the exposure time and achieve the effect you had in mind. My best shots have been shot between f/8 and f/16 with exposure times up to 4 minutes. So that’s what I prefer to shoot with and I’m always looking for situations and conditions in which I can shoot with my ideal settings. Shooting at f/22 reveals too much sensor dust and besides that the object itself isn’t as sharp as I would like it to be. Shooting at f/13 or f/16 often give me the perfect balance in sharpness of objects, depth of field and lack of sensor dust and other noise. But I won’t hesitate a moment to shoot at f/22 or for that matter, at f/4.0 if the occasion arises and I won’t have a second chance to shoot it again in more ideal circumstances I usually prefer to shoot my long exposure seascapes in poor light conditions with a lot of clouds and cloud movement, never with a blue sunny sky. The light is just too bright and it will show in the photos with contrasts that are just too harsh. Besides that I think that shooting under a sky covered with clouds the light is more diffuse and can be controlled better by the photographer. It’s works like a soft-box in studio photography. Very often I shoot close to or around sunset when light is fading fast and I can shoot longer exposures to achieve a more ethereal effect. I never shoot at sunrise although light conditions are comparable to sunset. Why? Because I’m just too lazy to get up early –I love photography, but I love the warmth of my bed in the early morning maybe even more! Now, shooting long exposure architecture is a different matter in my opinion. In that case I’d like a blue sky with bits of clouds, thin layers of clouds are even better. They result in more subtle looking cloud movement. I prefer the subtle streak of clouds in my long exposure architecture shots to the ones with the explosive streaks of clouds. It’s all a matter of balance in the end-result. I will discuss this subject in another FAQ on B&W processing. This depends on so many things: weather conditions, the type of light, the subject, the angle, the effect you want to achieve, etc. An extreme long exposure of let’s say 3 minutes or longer isn’t necessarily better than a shorter exposure of 45 seconds. But it’s true that a longer exposure, especially when shooting seascapes, will give a more ethereal feel to it. Hard to explain but it just looks and feels more fragile, more surreal. But if you shoot architecture and you want to have those dynamic looking streaks of clouds then very often shorter exposure times varying from 45 seconds to 2 minutes is more than enough and a longer exposure would give a totally different look. And then there’s also the subjective and very personal factor. In my case I prefer to have exposure times of 3 minutes or longer for seascapes or landscapes and exposure times of 45 seconds up to 2 minutes for architecture. You can use my personal preference as a guideline but please do experiment! Well Mr. X. did you perhaps use a gradient filter or CP filter by any chance? Yes I did, replied Mr. X. So Mr. X., when you took the photo after you’ve rotated your camera 90 degrees to shoot in portrait orientation, did you also rotate your filter? Uhmmmm……… thanks Joel! (Real story!) Hi J., to be sure I have to take a look at your photo but my guess for now that this is caused by light leakage, either through the filters or more probable, through your viewfinder. Very often this is the cause of this type of magenta/purple coloured stripes or banding in the photo. Next time you go out shooting make sure to cover the viewfinder especially when the sun is shining on the back of the camera! I also would recommend using a lens hood. After I’ve looked at the photos I could see that this was indeed the cause. J. confirmed he didn’t cover the viewfinder and that it was very sunny that day. Unfortunately it’s a basic and physic rule that noise will increase with longer exposures. There’s a lot of literature on this subject available on the Internet but basically noise will increase in poor light conditions combined with longer exposures. There’s however a difference in how noise is handled by modern DSLR’s when compared with older model DSLR’s: modern DSLR’s simply handle noise better. There are many sites discussing this issue with some great examples and I surely can recommend reading Ken Rockwell’s site on this subject. How do I handle this myself? I think I have a good camera but still in some particular cases (very poor lighting conditions, or shooting with 20 stops) I’d notice increased noise in my photos. I try to avoid that by shooting at the lowest ISO (100) and if there’s still noise I just get rid of it by using noise reduction software. My favourite software for this is NIK Software’s DFine noise reduction tool. It works perfect for me: no noise at all! Short answer: never. Longer version: I never use it since I think, and with me other respected writers discussing this subject on the Internet, it is much more time effective to remove the noise in post-processing with for example Photoshop or with DFine from NIK software and controlling all parameters yourself instead of the camera. Besides that, and that is the most urgent argument to me: in-camera NR doubles the time of the exposure and since I usually shoot with exposure times of 3 minutes or longer this would increase exposure times for just one shot up to 20 minutes! I’m a patient man, but I don’t like to waste my time. I’m not going to discuss in detail here what in-camera NR does – I’m not a techy but consider myself a fine-art photographer – but basically it takes another shot right after the regular exposure, with the shutter closed. This results in a dark frame with noise or hot pixels from the image sensor, that’s being subtracted from the original shot and thus removing the noise and hot pixels. This is called dark frame subtraction and you can read more on this on Ken Rockwell’s site for example: great explanation with some great examples why removing noise yourself in PP is often just a better option. There are so many manufacturers of ND filters these days and there’s a lot of bad stuff around. The bad stuff is almost always very cheap. The good filters are almost always without an exception more expensive. I can recommend the following two brands: ND filters made by B+W (from Schneider optics and these are the ones I use) or the Lee filters. Singh-Ray also makes some fantastic filters but they are all very expensive. B+W and Lee are great high quality filters and I have shot with both. The difference between B+W and Lee filters is that B+W only have screw-on filters while the Lee filters require a holder that you have to attach to your lens and you basically put the filter into the holder. Some photographers prefer the Lee since you don’t have to screw the filter onto the lens and risk changing the settings. Another difference is that shooting with B+W filters will cause a red cast while shooting with Lee will cause a blue cast. I personally think the blue cast is fantastic, especially when you’re a B&W photographer. Please forget all the other brands, they’re just not good enough for me but if you’d like to have a go at it or even use welding glass for your long exposures: feel free to do so, in fact I have seen some great examples shot with welding glass as a filter. Well, to start off with: 6 stops filters are not strong enough for real long exposures during daylight. With real long exposures I mean anything longer than 1 minute, but for seascapes I prefer to shoot with exposure times of 3 minutes or longer to achieve the smooth effect in the water. You’d need at least 10 stops to shoot at daytime with longer exposures, but even then you’ll notice that 10 stops is not enough especially when shooting on brighter days. So what I do is often stack filters up to 20 stops (although I wouldn’t recommend shooting with 20 stops). Out of my own experience I’ve found out that stacking filters up to 13 or 15 stops give the best results during daytime with exposure times up to 6 minutes. My recommendation would be to buy another set of ND filters: one 10 stops and one 3 stops so you can vary between 10 and 16 stops with the 6 stops you already have. Still you can achieve great results with the 6 stops only if you shoot in poor light conditions, close before sunset for example with exposure times up to 4 minutes ore even longer if it’s dark enough. It’s what I prefer to do most of the times: shooting in poor light conditions close to sunset (or around sunrise but I’m not an early riser), in heavy fog or in between rainstorms and not using too many stacked filters since vignette will increase when stacking filters. You’ll need a good DSLR to start with. Any modern entry level DSLR would do just fine. Make sure it has a Bulb setting to shoot with exposure times longer than 30 seconds, and in the case of any modern DSLR at entry level it will surely have a Bulb setting. A good lens is another important ingredient for shooting good shots. In case you shoot long exposures you will often find you need a good wide-angle lens. Invest in that, it’s worth it. But in general a good photograph is made by a good photographer with a good set of eyes and more importantly with the ability to visualize with the mind’s eye, not by an expensive camera with expensive lenses with a bad photographer behind the viewfinder. Further more you’ll need a remote control with a shutter lock and a good tripod. Now a good tripod is essential if you like to shoot good long exposures in rough weather conditions. Don’t buy a cheap tripod, you will regret it. I like to use a heavy tripod since I often shoot in rough and windy weather conditions. Not ideal for travelling of course but I prefer sharp photos and a sore back and arms to blurry photos and still be in good conditional shape after I shot the blurry photos. Besides that: you don’t want your camera with lens and filter on it to be smacked to the ground and broken in pieces due to a sudden wind gust? It happened to me. I always opt for longer since I always add 30 to 50% to the calculated exposure time. So the best option for me would be to go for the longer one. In fact I like overcast and dreary days, but it depends on the type of clouds and cloud movement. I guess you’re referring to a very boring looking sky with no variation in clouds. Well my strategy would be to not shoot any skies, but focus on the water, or better yet: don’t shoot any long exposures at all! But that’s my way of working: if weather conditions aren’t co-operating then I prefer not to do any outdoor shooting at all but do some studio work instead like shooting still life work.- Why would you do long exposures instead of a normal exposure?
- How do you find great locations for either seascape of architecture images? While living far away from the coast I am forced to take only those opportunities provided during my business travel. Maybe you can point out how you prepare your shootings. I guess you know many great locations already, but how do you prepare shootings at places you do not yet know?
- Concerning screw-on B+W versus filter holder system of Lee: I use the B+W so far, as it was much easier to get my hands on. Lees filter holder system is quite difficult to purchase. As you use the same system I would like to know if you have some tricks to share about your in-field workflow? I mean screw on and off your filter, re-compose, adjust focus etc. I always struggle here as I am afraid of dropping my filter or inadvertently change any camera/lens setting.
- I find it quite difficult to judge exposure time while light is changing rapidly, e.g. sunset/sunrise. Is it just experience or any rule on how to extend or reduce exposure time?
- I’ve been looking at your photos and I see at the EXIF settings that you sometimes shoot at f/22 and some are shot at f/3.5. What is the best aperture to shoot with?
- At what time of day, in what type of weather conditions do you usually shoot your long exposures?
- How do I know what the correct exposure should be? Okay, I can look into one of the charts with the exposure settings to look it up, but what I mean is: if I can shoot 30 seconds on f/16 or 2.5 minutes on f/22. What should I choose?
- I was doing some long exposures the other day and when I got home there was a strange dark band on the left side of my photo. This Mr. X then showed me the photo, portrait orientation and indeed there was a dark band on the left side. Then he showed me another one, also a dark band on the same side. So Joel, what’s with it?
- Dear Joel, I finally bought myself some ND filters after reading all your wonderful articles (real story!) and went to the beach yesterday after a long drive. When I got back home and looked at my photos on the computer I saw some strange magenta/purple/pink stripes on my photo. I’m worried that I’ve ruined my sensor or maybe the exposure time is too short. Do you have any idea what caused this?
- When shooting long exposures I’ve noticed that some of my shots have a large amount of noise. Your shots all look so clean and free of noise. How do you handle this?
- Do you use the in-camera Noise Reduction (NR) when you shoot long exposures?
- I’ve been looking at your photos and was being inspired to shoot long exposures myself. I’ve been searching for some affordable but good ND filters but don’t know what to buy. I’ve found this ND filter (shows link to website), could you recommend this to me?
- Just recently I’ve been starting to shoot long exposures to achieve the same effect with the smooth water and dramatic skies as in your images. I’ve bought this 6-stops filter but my exposure times are nowhere close to yours and the result I have with the water and sky are disappointing. What am I doing wrong?
- I’m starting to shoot long exposures, so I have bought a set of ND filters, what more do I need now and what would you recommend? Any tips, advise?
- If the suggested metering time is between two stops, should we opt for the longer or shorter of the two?
- What’s the best strategy for shooting on overcast, dreary days? (Getting lots of those here lately.)









Joel,
Thank you for sharing these FAQ! The question I had (purple stripes), I found the answer in your FAQ. I can avoid this from now on! Nobody I’d asked knew the answer, so thank you very much.
If you ever will have a workshop in the Netherlands, I’ll be there!
Aline
Have to laugh at the not getting up for a sunrise,I am the same Joel, I think I have made five in last five years, but I managed one today and it was worth it ( I actually got back into bed but couldnt sleep) great posts/insights as always Joel
Thanks Joel, very comprehensive FAQ. Many great tips and techniques described above. Well worth reading it. Doing long exposures for quite a while I was very interested in how exposure time is changing the look of an image. Most of the time I ended up with 30 sec. for seasacpes and I was not too happy about the result. Reading your FAQ I found more information about this.
Some more questions I could address here:
1.) How do you find great locations for either seascape of architecture images? While living far away from the coast I am forced to take only those opportunities provided during my business travel. Maybe you can point out how you prepare your shootings. I guess you know many great locations already, but how do you prepare shootings at places you do not yet know?
2.) Concerning srew-on B+W versus filter holder system of Lee: I use the B+W so far, as it was much easier to get my hands on. Lees filter holder system is quite difficult to purchase. As you use the same system I would like to know if you have some tricks to share about your in-field workflow? I mean screw on and off your filter, re-compose, adjust focus etc. I always struggle here as I am afraid of dropping my filter or inadvertently change any camera/lens setting.
3.) I find it quite difficult to judge exposure time while light is changing rapidly, e.g. sunset/sunrise. Is it just experience or any rule on how to extend or reduce exposure time?
Thanks for the feedback. I will add some new answers to this FAQ on a regular basis. Consider it a continuing work in progress.
Joel
Joel,
You have a well informed audience. Excellent questions all.
If the suggested metering time is between two stops, should we opt for the longer or shorter of the two?
What’s the best strategy for shooting on overcast, dreary days? (Getting lots of those here lately.)
Thanks,
Dominic
Thanks Joel for sharing these and an absolutely brilliant website. You tutorials are a great piece of learning and are a big break through when I get stuck up at some particular technique.
I use B+W and get a bit of grayish cast, good to know about the difference in B+W and Lee cast. I was also wondering about noise in LE, thanks for details about it.
Joel, smaller font text is a bit difficult to read on a black background because font colour is a bit submerged in background colour. Visually BWVision looks more appealing now than it did before
You’ve mentioned “calculating exposure time” several times, but just how do you go about calculating exposure?
Thanks.
Steve
B+W and Lee are great filters, but how can we forget Hoya as “all other brands”? it is know that optically Hoya nd400 is better than B+W 110, as it gives almost no colour cast
Rico,
If you like Hoya then by all means keep using it. I prefer the B+W and Lee filters and besides that Hoya doesn’t have a 10 stop filter only a 9 stops. It’s just one stop less but it’s a big difference when doing daytime long exposures.
Joel
Excellent work Joel with this Q&A, I did answer most of my question. When you will do the one for post processing using Silver Efex Pro 2. I do believe this is one of the most important work after taking the shot. I did ask to Nik people to have you doing one of theirs workshop video for this product so people can watch it any time they need.
Thanks
out of everything I’ve read on the net about LE (and it’s been quite a lot) this series is by far the most concise, clear and helpful.
I’ve just found answers to things that were puzzling me for quite some time and that I could no way figure out by myself.
thanks a MILLION, Joel!
you’re not only a great photographer, but also a very talented teacher!!!
Fantastic photography and fascinating about long exposure photos. You are making photography much more interesting and with vision. I am learning a lot thru Q&A and thru your own expertise, great way to teach. Many thanks for that.
Q: I have notice that you use really wide angles but is the 24mm not good enough? would that be fine too?. Last but not least what about infrared techniques, would that be the same as shooting long exposure?
Ciao Domenico
Joel, First I’d like to say how inspiring your imagery is. It’s the de facto standard of LE excellence!
I have a Canon 16-35mm Mark II lens which has a big 82mm thread. For a short time B+W made the 3.0 ND for it, but now it’s discontinued. I should have scooped one up when they were available. I noticed that Heliopan makes one, but I had sharpness issues with their Polarizing filter on my 70-200 2.8 IS. So I’m a little reluctant to try it.
Maybe I should consider a different wide angle lens with a smaller thread diameter, but I’m not going backwards to the 17-40mm. I wasn’t as happy with that lens. I wish I could easily filter my TS-E 17mm, ha!
Can you give me any advice on this?
Thanks,
John
hi JoelT, Do you use GND in any or all of your shots?
Thanks!