Let's talk about D.O.F
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@unknownuser said:
I get the camera out and pick a subject that best emulates the render. I take a few shots of it starting with a very shallow depth at about f-1.8 to f-4...moving to a long depth at around f22 or higher. I decide which depth is going to work and I set the renderer to that f-stop. I do this every time. If it is set properly it seems to ad a level of realism that you cannot get without it.
Wouldn't it be quicker to just do a few low res test renders?
-brodie
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hypershot dof
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interesting, and what renderer do you use?
-Brodie
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Here is a screen shot (portion) of Vue's camera DOF controls.
Besides the normal numerical inputs you have camera controls, 1) is the point of total focus and 2) is the start of DOF.
And here is the other camera controls.
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There is a 3rd party DOF app available, and free, this is from a guy called 'Wax' that posted on the Twilight forum, see his site and give it a try.
Okay, I have been playing around with a simple model, using post processing, does this look right?
Image no DOF
Background DOF:
Foreground DOF:
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Here is another post edit DOF attempt, this time I concentrated on the flower bed in the foreground, but something is just wrong and I cannot figure out what.
(Twilight render)
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Okay imagine you are squinting then
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How do you input the area that should be blurred? The second image seems odd. The blur seems to be bleeding over to the shadow of the box in the background. I imagine on a more complicated scene this would be even more obvious.
-Brodie
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In architectural composition which mostly is scene with some distance from the camera, DOF is nonexistent. If you look any great arch photography it is not evident. However if we are talking product design with close up shots than DOF is quite powerfull tool.
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@unknownuser said:
If you really want to get into DOF you have to buy a camera. The ideal camera would be an old reflex 35mm with a 55mm lens on it. So you are thinking is modelhead nuts (yes)...This camera is not for taking picturesit is for checking DOF. These old reflex cameras will allow you to adjust the F-stops while you look through the camera lensso you can see in real time how your depth of field is changing. I have a working camera but I also have one of these test cameras...it is a pentax spotmatic from the 70's. I paid 20 bucks for it.
Might as well just get a nice new DSLR if you're gonna get into photography.
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@solo said:
Here is another post edit DOF attempt, this time I concentrated on the flower bed in the foreground, but something is just wrong and I cannot figure out what.
The image is quite unsuitable for the use of DOF effects. In a bright daylight setting with an extreme wideangle lens, everything is in focus from the toes of the photographer to the distant mountains.
@sepo said:
In architectural composition which mostly is scene with some distance from the camera, DOF is nonexistent. If you look any great arch photography it is not evident.
Actually, in good arch photography the DOF is almost infinite, as in any photography under good conditions, medium to long distances and good lenses. In an extreme closeup photograph the DOF is very shallow.
The use of DOF is one of the differences between a realistic render and an imitation photograph. The human eye (actually, the brain)experiences everything as sharp, regardless of distance, lighting or atmosphere (except fog).Anssi
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@unknownuser said:
@unknownuser said:
The use of DOF is one of the differences between a realistic render and an imitation photograph.
....my feeling as well.
@unknownuser said:
Might as well just get a nice new DSLR if you're gonna get into photography.
None that I know of (DSLR's) can do what I described in real time. I use a nikon d300 and a Canon Rebel. Neither of these cameras can adjust DOF in realtime through the lens.
Both of those cameras have a depth of field preview button, read the manuals. All DSLR's have depth of field preview buttons afaik. My sony alpha 100 does.
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@unknownuser said:
will be the "yes they will posts" but none do this with real-time viewing Real time viewing of the DOF is something you have to see to understand.
Seriously, read the manuals on your cameras. Then come back here and tell me they don't do it in real time. I can catagorically guarantee you that they do.
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@sepo said:
In architectural composition which mostly is scene with some distance from the camera, DOF is nonexistent. If you look any great arch photography it is not evident. However if we are talking product design with close up shots than DOF is quite powerfull tool.
The most I'm waiting to see is a slight lens blur for the first meters form camera, that's all. Supposing that we use an f8-f11 (better lens quality there). For f16-f22 DOF problem doesn't exist.
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@unknownuser said:
@unknownuser said:
When you find a DLSR that allows DOF in realtime let me know.
I mean really!!!....I'd like to have it
I just read through the D300 manual, page 105 good sir. Depth of field preview through the viewfinder. Take my word for it, all DSLR's have DOF preview in realtime.
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"When you find a DLSR that allows DOF in realtime let me know."
When you find any camera that has a DOF preview, let me know. I mean a real functional preview. (with the exception of studio cameras). So many years in a dark room, haven't found it yet. Instead of this preview, a guess f- depended is always useful.
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Dof is only artistic, photographic or when you have some cataract
Smog, smokes , waterfall fogging are rarely inside living room of no smokers
Maybe in the kitchen when you overpass the roasting burning cooking time
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Solo:
Can you do a fast 3D nature scene with a house or something in the midle with, render that and the depth pass with VUE and post it here? So that way i'll try to do a generic tutorial that could be used with most 2D apps. I'll post it here with the final result and we all can try make it better with tips and advices. Like a comunity tutorial. What do you think? If you like the ideia try to make a image with detail close and far from the camera.
By the way, has richard said, photoshop it's not that hard to pick up, and beeing a Standart has it is to the industry means that, besides beeing a really great software, anything yout don't know how to do it it's easier to find help and tutorials everywhere. So my advice give a try to photoshop (and if you can pass that "test" and like it in the process, the next step you'll do will probably be the same has i did: buy a tablet;))
David
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@solo said:
Here is another post edit DOF attempt, this time I concentrated on the flower bed in the foreground, but something is just wrong and I cannot figure out what.
(Twilight render)
i think that the 2 columns next to the center flower bed should be sharp since they are on the same view plane, but they look out of focus for some strange reason..
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David, great Idea.
I added a few things to a previous model setup in order to give it detail in the fore, mid and background. There is a zip file with the three images which include render, alpha map and depth map.
If anyone has paint-shop pro regardless of version and can pull this off, please feel free to play.Oh, I already have a tablet, a wacom that I use with Corel software like Painter 11.
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