Tekforums
Chat => Photography => Topic started by: Binary Shadow on April 25, 2006, 18:56:31 PM
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Iv got a Canon digital ixus i and i need some tips. Its a 4 MP camera and is great for point and shoot photos. Or so i thought.
Look at the below photo:
(http://homepage.ntlworld.com/a.woodford/bc.jpg)
Notice the wheels, round the alloy where it meets the tyre, a blue tint.
I get this discolouration a hell of a lot these days. What is it, what causes it? What can i do to stop it?
Cheers
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Lens problem? have you cleaned the lens?
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My people call it "a highlight". ;)
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not touched the lens, seems clear and not dirty at all
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heres a section in the native res:
(http://homepage.ntlworld.com/a.woodford/problem.jpg)
The camera is in the highest res and quality itll do. Kinda expected better from canon.
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My people call it "a highlight". ;)
Nothing constructive to add? :-)
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My people call it "a highlight". ;)
Nothing constructive to add? :-)
Erm, my comment is the only constructive one in this entire thread. Finely textured black, such as that of tire sidewalls, may get blue highlights do to optical dithering. Note a blackbirds wings in the sun.
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its not just around the tyre tho :( its round the tree in the backgroud as well, its pretty messy if you zoom in at all
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See if the quality is set to anything but the highest setting, youre probably just sensitive to compression artifacts.
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tis set to max res and superfine (max quality). dunno what quickshot is but might try turning that off for a bit.
Have uploaded the full image as it comes off the camera:
http://homepage.ntlworld.com/a.woodford/imagef.jpg
Take a look, notice around the tree top left, top of the roofs. if you zoom in on it its orrible.
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Another enhancement, called QuickShot, allows users to take a very fast picture without having to wait for the camera to focus. The camera just switches to infinity and fires.
Sounds like a bodge to me lol
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U-huh.
Its called Chromatic Abberation. Nothing to do with pixels or file size - just poor lens qualiteh, tbh.
http://www.dpreview.com/learn/?/Glossary/Optical/chromatic_aberration_01.htm
:)
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great my poor quality £220 (when purchased) camera fluffs every photo i take.. great!
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Go into your image editor, draw a circular mask (marquee tool) loosely around the rim and desaturate the Blues. :)
Before:
(http://homepage.ntlworld.com/a.woodford/problem.jpg)
After:
(http://i4.photobucket.com/albums/y102/pbr/problem1.jpg)
:)
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oh... sweet :D cheers :)
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Yers welcome! :D
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So i was right :D - brummie does it again LOL
Well put right their Eagle. :thumbup:
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hmm cant find a way of doing it in corel photopaint, can desaturate to a greyscale lol but cant find a way to do the blue
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hmm cant find a way of doing it in corel photopaint, can desaturate to a greyscale lol but cant find a way to do the blue
try Gimp. its easy to do and gimp is free :D
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Tiz Chromatic Abboration.
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hmm cant find a way of doing it in corel photopaint, can desaturate to a greyscale lol but cant find a way to do the blue
try Gimp. its easy to do and gimp is free :D
will try gimp, but if when i google it i get tons of dodgy porn therell be trouble :P
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http://www.gimp.org/
thers no porn on my net connection well that what i tell the misses :P
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installed, looks good but i still cant find the option to do it lol
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ijn the options above your picture
tools/colour tools/hue-saturation
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ah hah! had found it just 2 mins before reading your post. Cheers
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Canon arnt exactly known for the quality of their low end glass TBH, the L series stuff is supposed to be good, but anything that comes with an amature camera from Canon is not going to be stunning.
I tested the lens on my friends Canon 20D vs that on my Lumix FX-7 sub-compact and the Lumix has better corner sharpness and no visible chromatic aberation whereas the canon kit lens is soft at the edges, barrel distorts like a mad thing and has some of the worst CA Ive seen. Consider that the Lumix is a £200 camera to the 20Ds £1000+ and youll see where Im coming from.
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...cant find a way of doing it in corel photopaint...
Image> Adjust>Hue/Saturation/Lightness ---- then click on the Blue channel (radio button) and move the slider to the left. :)
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Eagle hits the nail on the head, this is Chromatic Abberation
Shame really, your camera is dead compact and portable!
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Plenty of cheap cameras suffer the same problem, some are worse than others though.
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Eagle hits the nail on the head, this is Chromatic Abberation
Shame really, your camera is dead compact and portable!
Yeah its handy for quick snaps... might have to get a real camera for better pics tho... any suggestions? ;)
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might have to get a real camera for better pics tho... any suggestions? ;)
Either Fuji FinePix S5200/S5600 (they are the same camera) or one of the Panasonic Lumix DMC-fz30s if you dont want to bother with changing lenses. One of the Canon SLRs if you do or if you want to go night photography/astronomy.
http://www.dcviews.com/_fuji/s5600.htm
http://www.digicamreview.co.uk/fujifilm_finepix_s5600_s5200_review.htm
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Before you go chucking dosh at the problem.
http://www.nikonians.org/dcforum/DCForumID36/15704.html
Voila :) some nice easy photoshop filters for CA :)
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Although the above chromatic aberrations can be purple in color under certain circumstances, "Purple Fringing" usually refers to a typical digital camera phenomenon that is caused by the microlenses. In simplified terms purple fringing is "chromatic aberration at microlens level". As a consequence, purple fringing is visible throughout the image frame, unlike normal chromatic aberration. Edges of contrasty subjects suffer most, especially if the light comes from behind them, as shown in the example below. Blooming tends to increase the visibility of purple fringing.
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might have to get a real camera for better pics tho... any suggestions? ;)
Either Fuji FinePix S5200/S5600 (they are the same camera) or one of the Panasonic Lumix DMC-fz30s if you dont want to bother with changing lenses. One of the Canon SLRs if you do or if you want to go night photography/astronomy.
http://www.dcviews.com/_fuji/s5600.htm
http://www.digicamreview.co.uk/fujifilm_finepix_s5600_s5200_review.htm
I have the 5600 and it is an excellent camera. I love it in everyway.
Only one thing about it i think is quite poor, the macro. Not as good as others but definately makes up for it everyway else.
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might have to get a real camera for better pics tho... any suggestions? ;)
Either Fuji FinePix S5200/S5600 (they are the same camera) or one of the Panasonic Lumix DMC-fz30s if you dont want to bother with changing lenses. One of the Canon SLRs if you do or if you want to go night photography/astronomy.
http://www.dcviews.com/_fuji/s5600.htm
http://www.digicamreview.co.uk/fujifilm_finepix_s5600_s5200_review.htm
unless you realy dont want to change lenses and want a super zoom, id go for the Pentax *ist over the FZ30 at £12 difrence in price, and I rarely use above 200mm on my FZ30, and since the *ist is a DSLR so it can grow with you
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might have to get a real camera for better pics tho... any suggestions? ;)
Either Fuji FinePix S5200/S5600 (they are the same camera) or one of the Panasonic Lumix DMC-fz30s if you dont want to bother with changing lenses. One of the Canon SLRs if you do or if you want to go night photography/astronomy.
http://www.dcviews.com/_fuji/s5600.htm
http://www.digicamreview.co.uk/fujifilm_finepix_s5600_s5200_review.htm
I have the 5600 and it is an excellent camera. I love it in everyway.
Only one thing about it i think is quite poor, the macro. Not as good as others but definately makes up for it everyway else.
Im a S5000 user :) Loving it, reckon its brill.
Thought the same as brummie with macros, however with close up filter set... you get damn close.
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awww naa, you know you want to splash out and join the EOS club :lol: