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davidmorgan
Joined:
23-11-2006
Messages: 1620
from The New Forest
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|  New Message Posted!2009-02-04 00:45
HDR is definitely a good tool, I'm using a free trial of Photomatix - I reckon I'll pay the fee (99 US$).
Both these pictures were hand held. (You need a special licence from INAH to use a tripod at Mexican sites, apparently).
Strangely, with my new camera, I don't seem to be able to take photos horizontally properly - I keep having to rotate the image by 1 degree to the right!
[ This message was edited by: davidmorgan on 2009-02-04 11:38 ]
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davidmorgan
Joined:
23-11-2006
Messages: 1620
from The New Forest
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| New Message Posted!2009-01-13 14:54
Now I want a Sigma 10-20mm f4-5.6 EX DC. (Dreaming).
Nice photo here taken with this lens.
P.S. I'm often entertained by the sponsored link ads on the MP, this time I see a camera (obviously), but I remember having seen a gall stones removal advert once.
[ This message was edited by: davidmorgan on 2009-01-14 00:02 ]
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davidmorgan
Joined:
23-11-2006
Messages: 1620
from The New Forest
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| New Message Posted!2008-12-12 11:33
The CHDK is part of my kite-cam plan (one day). But you're right about it's usefulness in HDR - you could run any script you liked, changing exposure for limitless frames. Worth looking into as a cheaper alternative.
I see a Canon Powershot S3 IS is a third of the price of the 450D.
Forget that, a Powershot A570 is only £55, run it till the "Non Rechargeable AA" batteries run out.
I'm thinking anaglyphs now.
Here's a nice one.
[ This message was edited by: davidmorgan on 2008-12-12 15:01 ]
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h_fenton
Joined:
22-10-2005
Messages: 105
from OXFORDSHIRE, UK
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| New Message Posted!2008-12-11 20:04
david, if you have a canon compact which is CHDK capable you could load a script to do all the bracketing you could dream of. you might also be able to fool the camera into doing a 64second exposure for those night shots
H
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davidmorgan
Joined:
23-11-2006
Messages: 1620
from The New Forest
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| New Message Posted!2008-12-11 13:25
Right, I'm getting into HDR photography. I'm going to buy a Canon 450D which can do 3 bracketed frames over a maximum range of 4 EV steps (is that the same as f-stops?) - here's a list of cameras with their bracketing abilities. And also the Photomatix software. That should get me started. With the camera you get control software, so I'll probably work up to attaching a laptop in order to get many frames.
I was very impressed by Tony Partington's HDR video, looks like quite a lot of work went into that, maybe there's some batch processing technique.
"Unfortunately, three shots spaced by one EV are often not sufficient for properly taking HDR scenes."
Oh dear, is 3 shots at two EV ok?
[ This message was edited by: davidmorgan on 2008-12-11 13:35 ]
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davidmorgan
Joined:
23-11-2006
Messages: 1620
from The New Forest
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| New Message Posted!2008-04-08 10:06
I'm very impressed by the standard of some of the recent pictures. I was wondering about HDR. Does one have to set up a programmed sequence of bracketed exposures and then let the camera click away?
Thus avoiding any camera movement when changing the exposure.
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davidmorgan
Joined:
23-11-2006
Messages: 1620
from The New Forest
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| New Message Posted!2007-02-23 21:59
I wonder if you could get rid of the noise by doing a bit a post-production interferometry like astronomers do. You'd need a dark baseline image I guess.
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sem
Joined:
12-11-2003
Messages: 1722
from Bridgend,S.Wales
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| New Message Posted!2007-02-23 21:11
Hi Jim
Just a quick explanation of the film speed thing.
Digi cameras record the image on a CCD (Charge-Coupled Device), the electrical eqivalent of film.
If you increase the power through a CCD it becomes more sensitive, and picks up more detail plus more electrical "noise."
The two things are not the same but the effects on a picture are very similar.
Cheers
Sem
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JimChampion
Joined:
30-12-2004
Messages: 398
from Southampton
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| New Message Posted!2007-02-23 13:04
Quote:
| Unfortunately my digital compact doesn't have those exposure times or f-stop capability. |
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Neither did my old one. My current camera cost less than 200 pounds, isn't a DSLR but does have useful 'creative' features like being able to select f-stop, shutter speed or both. (And while we're on the subject does anyone know how the hell a digital camera can have an "ISO" setting? I thought that was to do with graininess of the film in olde-fashioned cameras?).
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davidmorgan
Joined:
23-11-2006
Messages: 1620
from The New Forest
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| New Message Posted!2007-02-23 11:07
Another thing - has anyone tried converting slides using a digital camera? I've tried slide scanners and they come out badly.
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