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Do you think my sensor might be dirty? · 11:49 AM

F22, with sigma 10-20mm

**mattb123** · 05-12-2014, 12:12 PM - **1 Like**

Definitely!
Besides all the spots it's a nice shot.

johnyates · 05-12-2014, 12:32 PM

Your being stopped down to f22 makes the dust spots stand out distinctly, and also, due to diffraction, your image not optimally sharp. You'd be better off shooting at ~f8 - f11 to benefit the most from your lens's optics.

rrstuff · 05-12-2014, 12:33 PM

Originally posted by johnyates

Your being stopped down to f22 makes the dust spots stand out distinctly, and also, due to diffraction, your image not optimally sharp. You'd be better off shooting at ~f8 - f11 to benefit the most from your lens's optics.

I know. I stopped down to F22 due to desired shutter speed and lack of nd filters... I don't think at 0.7mpix resolution I will be hurt all that much from F22

.

johnyates · 05-12-2014, 12:36 PM - **1 Like**

Ah! Makes sense.

Something I'm intending to try one day is to make up for the lack of a ND filter is to take a series of images and then stack them in software.

rrstuff · 05-12-2014, 12:38 PM

Originally posted by johnyates

Ah! Makes sense.

Something I'm intending to try one day is to make up for the lack of a ND filter is to take a series of images and then stack them in software.

Ah yeah that's a fun technique, especially for a macro. I haven't tried that, mostly because I am worried there will be a bit of a shake in between each shot. What I want to try is one of those fancy macro rails

.

Michael Piziak · 05-12-2014, 03:39 PM

Originally posted by rrstuff

F22, with sigma 10-20mm

I also was going to say being at a high F number (like F22) will really show the dust on your sensor. If you take the same photo at lower F number many of these specs will disappear.

That being said, have you tried Giottos Rocket to blow off the sensor ?

rrstuff · 05-12-2014, 04:31 PM

Originally posted by Michael Piziak

I also was going to say being at a high F number (like F22) will really show the dust on your sensor. If you take the same photo at lower F number many of these specs will disappear.

That being said, have you tried Giottos Rocket to blow off the sensor ?

Not for a while, but seems like i will have to.

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05-12-2014, 12:12 PM - 1 Like	#2
mattb123 Site Supporter Join Date: Apr 2010 Location: Colorado High Country Photos: Gallery Posts: 10,873	Definitely! Besides all the spots it's a nice shot.

05-12-2014, 12:32 PM	#3
johnyates Pentaxian Join Date: Aug 2011 Location: Saskatoon, SK Photos: Albums Posts: 1,345	Your being stopped down to f22 makes the dust spots stand out distinctly, and also, due to diffraction, your image not optimally sharp. You'd be better off shooting at ~f8 - f11 to benefit the most from your lens's optics.

05-12-2014, 12:33 PM	#4
rrstuff Veteran Member Join Date: Sep 2013 Location: Pasadena, CA Photos: Albums Posts: 1,126 Original Poster	Originally posted by johnyates Your being stopped down to f22 makes the dust spots stand out distinctly, and also, due to diffraction, your image not optimally sharp. You'd be better off shooting at ~f8 - f11 to benefit the most from your lens's optics. I know. I stopped down to F22 due to desired shutter speed and lack of nd filters... I don't think at 0.7mpix resolution I will be hurt all that much from F22 .

05-12-2014, 12:36 PM - 1 Like	#5
johnyates Pentaxian Join Date: Aug 2011 Location: Saskatoon, SK Photos: Albums Posts: 1,345	Ah! Makes sense. Something I'm intending to try one day is to make up for the lack of a ND filter is to take a series of images and then stack them in software.

05-12-2014, 12:38 PM	#6
rrstuff Veteran Member Join Date: Sep 2013 Location: Pasadena, CA Photos: Albums Posts: 1,126 Original Poster	Originally posted by johnyates Ah! Makes sense. Something I'm intending to try one day is to make up for the lack of a ND filter is to take a series of images and then stack them in software. Ah yeah that's a fun technique, especially for a macro. I haven't tried that, mostly because I am worried there will be a bit of a shake in between each shot. What I want to try is one of those fancy macro rails .

05-12-2014, 03:39 PM	#7
Michael Piziak Closed Account Join Date: Dec 2013 Location: West Virginia Posts: 2,815	Originally posted by rrstuff F22, with sigma 10-20mm I also was going to say being at a high F number (like F22) will really show the dust on your sensor. If you take the same photo at lower F number many of these specs will disappear. That being said, have you tried Giottos Rocket to blow off the sensor ?

05-12-2014, 04:31 PM	#8
rrstuff Veteran Member Join Date: Sep 2013 Location: Pasadena, CA Photos: Albums Posts: 1,126 Original Poster	Originally posted by Michael Piziak I also was going to say being at a high F number (like F22) will really show the dust on your sensor. If you take the same photo at lower F number many of these specs will disappear. That being said, have you tried Giottos Rocket to blow off the sensor ? Not for a while, but seems like i will have to.

Landscape Do you think my sensor might be dirty?

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