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10/19/2003 12:02:59 PM · #1
I was out last night taking pictures on my hometown again. as I were doing for the Urban challenge. This time with my 300D.

What do you think about them? Would be very glad for any contructive critiques, or comments.

I overall had a VERY hard time getting the town in focus, anyone knows why? I had ofcourse the camera mounted on a tripod and used "time delayed shutter release" (or whatever its called in english)
With my Canon 28-105 3.4-4 lens I couldn´t get it in focus at all (nor manually or AF), but with my sigma 70-300 APO 2 I finally managed when using manual focus. But still only okayish. Might it be the lens quality?
Here is the result:


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' . substr('//medlem.spray.se/mikepics/gbg_by_night/IMG_0642_lagerfix_liten_thumb.jpg', strrpos('//medlem.spray.se/mikepics/gbg_by_night/IMG_0642_lagerfix_liten_thumb.jpg', '/') + 1) . '

' . substr('//medlem.spray.se/mikepics/gbg_by_night/IMG_0668_suburb_liten_thumb.jpg', strrpos('//medlem.spray.se/mikepics/gbg_by_night/IMG_0668_suburb_liten_thumb.jpg', '/') + 1) . '

4. This is overexposed I know, but I included it because IMO the cool effect on the clouds!
' . substr('//medlem.spray.se/mikepics/gbg_by_night/IMG_0618_moln_liten_thumb.jpg', strrpos('//medlem.spray.se/mikepics/gbg_by_night/IMG_0618_moln_liten_thumb.jpg', '/') + 1) . '

Message edited by author 2003-10-19 12:08:04.
10/19/2003 12:15:30 PM · #2
I actually like number 4 the best, the cloud effect and lights are well balanced and look very unique and interesting. On number three the contrast of "green" lighted streets (that's the way it looks) to the bright one running in between is very nice and the lines work very well, taking you through the picture and up and down the streets. Those are my two favorites.

As for the focus thing, couldn't tell you, got my cheap little camera that is auto focus but very nice overall!

10/19/2003 06:35:21 PM · #3
Cameras have a hard time with auto focus in dark situations. Try choosing only a single focus point and pointing that at a brighter object in your shot that has good vertical lines. Once it gets focus, turn off the auto focus and you've got the proper focus for your next exposure.

After resizing, don't be afraid to use the Unsharp mask to pull out those details. They're in there. I played with a couple of your photos with good results. The results would have been even better if you'd first used unsharp mask, resized, then used unsharp mask again.
10/19/2003 08:35:56 PM · #4
Focus should not be a real problem with the 28-105, you should just be able to set it at infinity. At 300mm you may not be quite at infinity, but should be able to set to a hyperfocal distance and get your entire frame in focus.
What's probably happening here is you're shooting with the lens aperture wide open, I would guess. you will probably get sharper results if you stop down at least one full stop. Try F5.6 or even F8.
A final thought relates to shake induced by the mirror flipping up. I know the 300D has a different system (penta-mirror) and I don't know if "mirror lockup" is possible on the 300D, however you can simulate it. If your exposure is, say, 2.0s, set an exposure of 3.0s and hold a card in front of (but not touching) the lens for the first second. This will let the vibrations damp out before you begin the exposure.

10/20/2003 03:53:12 PM · #5
Actually, I forgot to mention that I did use a large aperture! F10-22 on both lenses. It cant be too much can it?
I used this settings except on pic #4 (which were taken with the canon lens and "P" mode) I also tried out the landscape mode and it put the aperture to 5.6, is that really enough for a wide landscape shot?
I tried several shots when moving the focusring from infinite and in very small steps downwards, until I could clearly see that it was out of focus. None came out ok.
Also when using AF the camera focus dot flashed and beeped that the subject was in focus, though it clearly wasnt when looking at the results. In the viewfinder all looked ok.

It might be the mirror slap!? Cleaver idea with the card thing! will try that the next time.
So this is the only thing that could have been the problem, or there´s some problems with my lens? or?

Thanks all for your comments and ideas so far!

Message edited by author 2003-10-20 15:54:25.
10/20/2003 04:39:47 PM · #6
Aperture of F10-22 on the canon lens is actually small. In the widest focal length of 18, the largest aperture is 3.5. Usually when I shoot at night I set my 300D to Av and choose the largest aperture, I up the ISO to 200 or 400.

photo was taken at F3.5, 1/8, ISO200 at focal length of 18mm.
10/20/2003 05:12:32 PM · #7
Originally posted by bruchen:

Aperture of F10-22 on the canon lens is actually small. In the widest focal length of 18, the largest aperture is 3.5. Usually when I shoot at night I set my 300D to Av and choose the largest aperture, I up the ISO to 200 or 400.

photo was taken at F3.5, 1/8, ISO200 at focal length of 18mm.

Depending on what you mean with small/large aperture: small/large opening or small/large F-number. Its abit confusing talking about apertures.. :\
As I understand it, a large F number/small opening gives more of the subject(s) in focus. Small f-number/larger opening gives you more light into the lens and you can raise the shutter speed, but you get a smaller dof = less things in focus.
10/20/2003 06:25:15 PM · #8
You're absolutely right Mikael.

For me I always refer to large aperture as having a small number (low Fstop), small aperture = large number (high Fstop).

You said in your first statement you used a large aperture of F10-22. That to me is a small aperture.

Yes, i am confused. Hey your photos look great.!
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