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KM141




註冊: 2005-02-13

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題目Smear spots on small aperture (<f8) pix taken by 350D     Post time: 7 月 3 日

I recently found that there are quite obvious smear spots on pics taken with aperture smaller than f8. On a f11 sample I can start to discern the smear spots, and when the aperture goes smaller, they become very obvious. I have tried cleaning the CMOS, yet to no avail. Can anybody help? Or does anyone also come across the same touble?
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KM141




註冊: 2005-02-13

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題目Re: Smear spots on small aperture (<f8) pix taken by 350D     Post time: 7 月 3 日

Pl see some samples at:
http://photos.yahoo.com/km1412003
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fdman




註冊: 2003-11-05

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題目Re: Smear spots on small aperture (<f8) pix taken by 350D     Post time: 7 月 3 日

CCD 面有塵,清左佢OK
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man1492




註冊: 2005-03-25

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題目Re: Smear spots on small aperture (<f8) pix taken by 350D     Post time: 7 月 3 日

I believe the lens is stained. If it is dust from sensor it won't be affected by aperture. Obviously the spots become more visible when aperture goes down at which the field of depth is deepest.
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KM141




註冊: 2005-02-13

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題目Re: Smear spots on small aperture (<f8) pix taken by 350D     Post time: 7 月 3 日

Solution found. Please see:
http://forums.dpreview.com/forums/read.asp?forum=1031&message=14109744

Thx!!!!!!!!!!!!
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