Spots on the background

ThomasD · 19th October 2005

Hi all macro gurus,

I have a copy of the Tamron 90mm and wondering if I have got a bad one. The background of the picture taken with this lens produces spots. It is not the CCD problem as I have tested my camera with other lens. Can anyone advise is this normal. The spots will only appear when the backgound is OOF, are these spots cause by dusts inside the lens?

Cheers..thomas

zaxh81 · 19th October 2005

when you test with another lens,is the setting same?

try another lens and set the aperture to say f22 and shoot.Seem like a ccd dust problem to me.

ThomasD · 19th October 2005

Hey thks bro, after shooting with another lens at f22, spots everywhere. Thk God it is not the lens problem. How to clean the CCD huh? I am using 20D.

peteryeo · 19th October 2005

Originally Posted by ThomasD

Hey thks bro, after shooting with another lens at f22, spots everywhere. Thk God it is not the lens problem. How to clean the CCD huh? I am using 20D.

If you send to Canon Service Centre,Their charge you S$20 +GST5%.Look like your is a small matter maybe can try use PS to touch out.

Regards
Peter Yeo hwai teck

zaxh81 · 19th October 2005

I use a blower to blow the mirror but not sure if that's the correct way.
i choose mirror lockup then blow.

Cause i lazy to go service centre so just live with using a blower,it just reduce the dust abit.
Going down to service centre is a much wiser choice.

ThomasD · 22nd October 2005

The blower works! Now there are much lesser spots..

Canew · 22nd October 2005

Originally Posted by ThomasD

The blower works! Now there are much lesser spots..

ThomasD, did you use a Jumbo blower? Did you blow with the camera facing downwards? Before actually blowing into the camera, di you blow the blower a few times first?

zaxh81 · 22nd October 2005

Originally Posted by ThomasD

The blower works! Now there are much lesser spots..

glad it works for you.

For me,i need to go service centre already,after blow still got like 30 over spots at F22.

ThomasD · 24th October 2005

Does Canon provides free CCD cleaning during warranty period? Heard Nikon does..

zaxh81 · 26th October 2005

Not sure,you may do a search,should yield some results.

lightning · 29th October 2005

Humm read somewhere that it is not advisible to blow the CCD or mirror. The dust get collected else where within the cam, and may cause some side effects after a while.

19th October 2005	#1
ThomasD Member Join Date: Sep 2004 Location: Ang Mo Kio Posts: 333	Spots on the background Hi all macro gurus, I have a copy of the Tamron 90mm and wondering if I have got a bad one. The background of the picture taken with this lens produces spots. It is not the CCD problem as I have tested my camera with other lens. Can anyone advise is this normal. The spots will only appear when the backgound is OOF, are these spots cause by dusts inside the lens? Cheers..thomas __________________ FOCUS ON PIXEL

19th October 2005	#2
zaxh81 Senior Member Join Date: Jan 2003 Location: Earth Posts: 4,383	Re: Spots on the background when you test with another lens,is the setting same? try another lens and set the aperture to say f22 and shoot.Seem like a ccd dust problem to me. __________________ Nikon D150 \| 25mm F0.7 \| SB400

19th October 2005	#3
ThomasD Member Join Date: Sep 2004 Location: Ang Mo Kio Posts: 333	Re: Spots on the background Hey thks bro, after shooting with another lens at f22, spots everywhere. Thk God it is not the lens problem. How to clean the CCD huh? I am using 20D. __________________ FOCUS ON PIXEL

19th October 2005	#5
zaxh81 Senior Member Join Date: Jan 2003 Location: Earth Posts: 4,383	Re: Spots on the background I use a blower to blow the mirror but not sure if that's the correct way. i choose mirror lockup then blow. Cause i lazy to go service centre so just live with using a blower,it just reduce the dust abit. Going down to service centre is a much wiser choice. __________________ Nikon D150 \| 25mm F0.7 \| SB400

22nd October 2005	#6
ThomasD Member Join Date: Sep 2004 Location: Ang Mo Kio Posts: 333	Re: Spots on the background The blower works! Now there are much lesser spots.. __________________ FOCUS ON PIXEL

24th October 2005	#9
ThomasD Member Join Date: Sep 2004 Location: Ang Mo Kio Posts: 333	Re: Spots on the background Does Canon provides free CCD cleaning during warranty period? Heard Nikon does.. __________________ FOCUS ON PIXEL

26th October 2005	#10
zaxh81 Senior Member Join Date: Jan 2003 Location: Earth Posts: 4,383	Re: Spots on the background Not sure,you may do a search,should yield some results. __________________ Nikon D150 \| 25mm F0.7 \| SB400

29th October 2005	#11
lightning Senior Member Join Date: Sep 2004 Location: Punggol Posts: 3,766	Re: Spots on the background Humm read somewhere that it is not advisible to blow the CCD or mirror. The dust get collected else where within the cam, and may cause some side effects after a while. __________________ My stock photos victor.shutterbug.sg