Viewing 40 posts - 1 through 40 (of 62 total)
  • HDR Photography
  • Creg
    Full Member

    Yep, yet another photography thread from me.

    So Ive been looking around on the net at HDR photography under the impression that I need a super amazing fantabulous camera worth more than I will earn in a lifetime to do it. Was quite suprised to discover that I can dabble in HDR using just my little Nikon D70.

    I found a basic guide to HDR and followed the instructions. Camera in Manual mode, ISO set to 200, tripod ready. I arsed around with the menu settings a bit and changed various things and took some photos in the house, sure enough the camera took 3 snaps (one normal, one really dark and one really light)…nice one, seems to be working.

    I go outside and setup to take some photos of the cliffs, storm clouds and light breaking through the clouds. Camera is already set and it takes 3 photos…but they all come out absolutely bright white with only a small amount of detail recognisable. Im assuming it was an aperture issue but I didnt have chance to correct it as it started raining.

    Is it worth pissing around with anymore to get it right or should I just sack it off as a waste of time? Do you need special subjects/content to take advantage of HDR stuff?

    stuartie_c
    Free Member

    You’ve got the base exposure wrong.

    The camera doesn’t have to be in manual mode – set it in on of the semi-manual modes like aperture or shutter priority (depending on subject) and switch on auto-bracketing. This will take 3 consecutive shots – one at the measured exposure value, one at +1 EV and one at -1 EV (you should be able to set the +/- values as well.)

    stuartie_c
    Free Member

    Oh, you’ll need some software like Photomatix to do the HDR stuff (image blending, tone mapping)

    psychle
    Free Member

    Doesn’t need to be in manual mode guv’ner… just use auto exposure and use the bracket function (which I assume you’re already doing if it’s snapping 3 pics…). You then use software to combine the 3 images and you get a much wider dynamic range than is possible with a single shot (HDR = High Dynamic Range). Personally I don’t like it, but if it floats your boat… 😀

    psychle
    Free Member

    too slow… what stuartie-c said…

    cynic-al
    Free Member

    Is anyone else under-impressed with HDR?

    I’m sure lots of shots are using it well (i.e. subtly IMO) so you don’t notice it, but these shots showing (e.g.) amazing detail on foreground, tree-bark, same on clouds behind etc….look overprocessed and are ten-penny IMO. But then the whole over-processing thing that the mags seem to be propogating these days (well they’ve got to fill the pages with something) just doesn’t interest me.

    stuartie_c
    Free Member

    Sounds like you’re using the indoor exposure settings for the outdoor shots, hence very over-exposed.

    stuartie_c
    Free Member

    Agree – most HDR stuff just looks naff, unless it’s done to subtly boost highlights and shadows.

    psychle
    Free Member

    Doesn’t have to be 3 images either… you can combine as many exposures as you want can’t you?

    cynic-al
    Free Member

    Aye S_C. I don’t buy many photo mags but a lot of the stuff they print leaves me cold. I am interested in photography but this really puts me off joining a club etc.

    mossimus
    Free Member

    You should not use as many exposures as you want, rather enough exposures to capture the full dynamic range of your subject.

    maxlite
    Free Member

    Yep – most HDR stuff just looks naff

    MrSmith
    Free Member

    i hate the overprocessed HDR look and have never used it for a job or been asked by clients for that ‘brightly coloured flickr look’. i do use bracketeer for shooting interiors for keeping highlights from blowing in windows etc and it does a superb job of blending.
    it’s a front end GUI for enfuse so very easy to use.
    even areas of white wall with areas of bright sunlight and shadows are blended seamlessly. if you have any registration errors you can load the images as a stack in cs align the layers in difference mode and then export as tiffs to be merged in bracketeer. you can even include layer masks on the tiffs if there is something you don’t want to include from a particular file.
    it cost next to nothing and has saved me hours of retouch time so worth every penny.

    psychle
    Free Member

    MrSmith… you sound like a pro? Whereabouts are you based?

    MrSmith
    Free Member

    Rude Boys Londons famous streets of London town.

    psychle
    Free Member

    Don’t suppose you’re in the market for an assistant? Or know someone who is? 😀

    crazy-legs
    Full Member

    The current issue of whatever photo mag it was that I was reading recently (so many titles now!) said to keep the camera on Aperture Priority, that way the depth of field stays the same and the shutter speed will vary to take into account whatever exposure compensation you’ve dialled in on the auto bracketing thingy.

    I don’t really like HDR either, it usually looks massively overprocessed.

    MrSmith
    Free Member

    Don’t suppose you’re in the market for an assistant? Or know someone who is?

    unfortunately not, i’m sorted for help. try the AOP.

    simonfbarnes
    Free Member

    for Windows I’ve located Hugin for image alignment and enfuseGUI for blending

    I can’t tell you how well they work yet but will report back

    Kbrembo
    Free Member
    psychle
    Free Member

    unfortunately not, i’m sorted for help. try the AOP

    shall do… cheers 🙂

    coffeeking
    Free Member

    HDR can look wonderful, can look aweful. However its a personal taste thing. I’ve done a few shots in HDR that have made people gasp and ask how I got such an amazing looking photo, yet I’ve also done some that I’ve simply scrapped half way through processing as it looked naff from the start. But having said that, even some of the more extreme versions can look amazing if done well. As with everything, its down to how well you execute it.

    uponthedowns
    Free Member

    Agreed. Depending on the subject sometimes the over processed look can work. I use HDR quite a bit and its possible to make HDR look quite natural by not going over board on the processing. Another thing that can help a natural look is to blend back the original “correctly” exposed image with the HDR image.

    Also if your camera takes RAW files then you don’t need to bracket. Just process the same RAW image three times at -1, 0, +1 stop exposure.

    coffeeking
    Free Member

    uponthedowns – the 3-from-one method isnt HDR, you’re not gaining any extra high or lowlight detail from what was originally taken, just correctly manipulating the available tones into your image. All you’re doing is manually selecting the tones that get put into the gamut and their spread in there, rather than recovering extra detail. For HDR you NEED different exposures. I’ll do you an example if you dont believe me 😀

    Bippa
    Free Member

    i hate obvious hdr pictures. i say pictures as i don’t think you can classify them as photos with all that post processing. it looks unreal to have everything exposed corectly, though if that’s what you like then great.

    mastiles_fanylion
    Free Member

    Of course nothing substitutes a good composition and a thoughtfully considered subject matter – all this HDR guff – isn’t it just a fancy ‘Photoshop’ effect really?

    JxL
    Free Member

    Few of my old HDR’s

    Trick is not to make it tooooooooo obvious 🙂

    Facebook page website

    dooge
    Free Member

    HDR was originally developed for gaming, and it was designed to give reproduce a wider tonal range to make it look more natural. HDR’s are tone mapped, and you get greater control in a dedicated program such as Photomatix however if you do think they look unnatural and over-processed try Exposure Blending, also in Photomatix. Essentially, a HDR photo is combined from 2 or more different exposures which include all the highlights and lowlights without being blown out or that have lost detail. Tone mapping was originally designed to A) improve the difference in contrast to provide a reproduced wider tonal range and B) pull out detail, however it was designed for games so when applied to photography A goes out of the window as you are combining 2 or more exposures anyway, not digitally reproducing that tonal range. HDR then just provides a way to improve detail and change the luminance of the colours shown, which often produces the over-processed look.

    Exposure Blending just combines 2 or more exposures without tone mapping, often producing more natural looking image overall.

    Going back to your original problem, use it in whatever manual mode you feel comfortable and as said above auto-bracket. In order to provide a familiar depth of field and sharpness you should use Manual, P mode or Shutter priority so that the aperture will not automatically change.

    coffeeking
    Free Member

    it looks unreal to have everything exposed corectly, though if that’s what you like then great.

    I say this every time though, it IS more real to have it all exposed correctly – generally your eyes dynamic range is an order of magnitude higher than that of your camera/monitors capabilities. What you are considering “real” is actually a limited version of reality that only resembles what your eyes see. HDR is far closer to reality (when done right, not over-saturated etc).

    i say pictures as i don’t think you can classify them as photos with all that post processing.

    They’re only “not photos” because the camera cannot reproduce reality very well. If someone brought out a camera that could reproduce the eyes abilities, all photos would look like HDRs (only better). You are aware of the fairly heavy amount of photoshopping that gets done in-camera as the picture is taken, arent you? (multiple noise filters, colour balancing, exposure modification etc).

    m_f – no, good composition and subject are the key, but HDR is an additional tool to better reproducing real life, rather than limited life. Though some scenes beg for “normal” photography to help reproduce a particular feeling or sense.

    dooge
    Free Member

    This is an example of one of my exposure blends although it looks a little unsharp when dropped in size and quality.

    mastiles_fanylion
    Free Member

    but HDR is an additional tool to better reproducing real life, rather than limited life.

    HDR is nothing but a filter, a technique. As you say – a tool.

    So I tend to agree that,used correctly, HDR can benefit a picture but it CANNOT substitute an inherently well composed image.

    Take, for example, Ansel Adams and the zonal system of exposure bracketing he devised. Some of the photographs he took are timeless, beautiful (I am sure most of you will know them – think Athena B&W pictures of Yosemite). But they are successful despite the system he devised, not because of it. This is because he considered composition first, the science behind exposing the image second…

    grievoustim
    Free Member

    I know nothing about photography but I think it can look great – like in JXLs images above.

    Question – is there an equivalent for cinema/ TV? Can you shoot the same image 3 times somehow on a movie camera and obtain the same effect?

    Tim

    igm
    Full Member

    OK – naive question time.

    If HDR is done subtly, does it look particularly different from the effect of a ND Grad stuck in front of the lens when you took the photo in the first place?

    (I accept that if it is a dimly light room with a bright outside seen through a window then you would have to be an absolute wizard with a area based ND Grad – which may not actually be produced)

    coffeeking
    Free Member

    HDR is nothing but a filter

    It’s not a filter, that would be incorrect. But it is a tool, a method of better reproduction of detail.

    But no-one has said it was a substitute for a well composed image, I’m not sure why you keep saying that. The whole point is you wouldnt try to shoot an amazing shot with an old 110 film camera because the image quality from it is very poor, you wouldnt try to get a super-sharp shot with a naff-quality lens. You might get shots that were good due to good composition, but you would be being let down by the media that you are using. While the best consumer cameras out there are damned good they are still limiting as a medium – if you want accurate (to the eye) reproduction of all areas of the image you NEED to do work with photoshop tools such as HDR. It’s like saying I can reproduce an amazing image using a 16-bit sensor – it’s all in the composition. Well a naff picture is a naff picture, agreed, but you wouldnt like the result of a 16-bit sensor (it wouldnt look anything like what you saw when taking the shot) so you’d strive to find a 32-bit sensor instead etc.

    coffeeking
    Free Member

    OK – naive question time.

    If HDR is done subtly, does it look particularly different from the effect of a ND Grad stuck in front of the lens when you took the photo in the first place?

    All an ND filter is is a method of reducing light into the camera, it reduces all colours equally so that you can work with a larger aperture inteh same light conditions. It has no similarity to HDR.

    In all honesty, HDR is a bit of a misnomer – your screen/graphics card cannot reproduce the dynamic range of the images you create using HDR so you’ll not see its true effects, all you see is the exposure-blending effects which are only part of the overall improvement of the image. It is the purpose of the HDR to gain enough detail in all exposure areas in order for the screen to try its best to replicate reality with its limited contrast ratio. JPEGs are 8 bit per channel, thats 256 shades of R, G and B. Your eye can see, at any one time, approximately 10,000 shades of each colour. When taking the photo a normal camera will create an 8 bit image with teh shades spaced out well in the pallette so that you get a good range, but it will undoubtedly lose some of the 10K shades to “fit” it into the 8-bit file. HDR takes multiple photos to try to get all 10K shades, then lets you choose where to spread the shades and lets you spread those shades differently in different areas of the image. A true HDR image file type (not JPG) stores all the shades for reproduction on a medium that can (print?).

    mastiles_fanylion
    Free Member

    I’m not sure why you keep saying that.

    Because people seem to be holding it up as the saviour of photography when it isn’t.

    Some people are just blindly using it because it looks ‘nice’ and it is becoming tedious and boring IMO.

    coffeeking
    Free Member

    Because people seem to be holding it up as the saviour of photography when it isn’t.

    No they’re not, there isnt one person here who has said anything remotely like that, or inferred it?

    It IS nice because it more closely relays the image you saw when taking the photo (if done properly). It has absolutely nothign to do with the composition of the image, thats a whole other matter.

    mastiles_fanylion
    Free Member

    Ohh whatever, I am bored of discussing it with you.

    coffeeking
    Free Member

    Dont forget to shut the door on the way out 😉

    dooge
    Free Member

    Its the ‘done’ thing at the moment because as everything its the fashion. Just like tilt and shift, just like the recent revival of Holga’s and naff badly exposed and vignetted images. Yes, some people do see it as an answer to one of the inherant problems of digital photography but most people on here are sensible and know differently.

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