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  1. #1
    Join Date
    Mar 2009
    Location
    San Diego, CA
    Posts
    602

    Angry Problems, dust and more problems

    So I was in San Franciso for a business trip and stopped at Treasure Island (yes, that's its real name) to get some shots. I decided to switch out the Tamron 70-200mm for the wider Sigma 28-90 with a CPL attached. It was a bit windy. I thought to myself, I should probably go back to the car and change out the lenses from shelter ... no, too much hastle.

    Switched out the lenses and this is what I ended up getting on each of the subsequent shots DUST BUNNIES

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    Plus, even though I've been reading that noon time is a good time to use the CPL because the sun is at a 90 degree angle, and despite it looking okay in the view finder, I got darkness around the corners.

    The DUST BUNNIES have been taken care of. Fortunately a couple of blasts of air took scurried them off. And some photoshop time can take care of the DUST BUNNY trails left in my last batch of photos.

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    But the operator error of the CPL is bugging me. Help.
    Darin Wessel
    α 900
    Zooms: Tamron SP AF70-200mm f2.8 Di LD Macro; Sigma 28-90mm D macro, Konica-Minolta 18-70 f3.5-5.6
    Primes: Minolta 28mm f2.8; Sony 50mm f1.4
    Minolta RC-1000 remote commander

    Film:
    Calumet Cambo CC400 4x5 View Camera
    YashikaMat 6x6 TLR (other accessories)
    Minolta Maxxum 7000 w/ Minolta 35-80mm f/4-5.6 & Minolta 2800 flash
    Minolta Maxxum 5000i & Vivitar 728 AFM flash
    What's next???

  2. #2
    Join Date
    Dec 2007
    Posts
    1,760
    I use a gitzo bulb blower..had the same thing a few weeks ago

  3. #3
    Join Date
    Jun 2007
    Location
    Oklahoma
    Posts
    530
    Do you ever wet clean your sensor? That last shot looks like it could use it. I see a spot above and to the right of that center pier.
    I wet clean my canon when the dust blower can't remove it.
    CPL problems are always hit & miss with me. I get frustrated too
    Spook
    Canon EOS 50D,7D and some lens and equipment.
    Fuji F200 Exr

  4. #4
    Join Date
    Dec 2007
    Posts
    1,760
    Havent needed wet yet

  5. #5
    Join Date
    Mar 2009
    Location
    San Diego, CA
    Posts
    602

    The spot

    Quote Originally Posted by Spookonthe8ball View Post
    Do you ever wet clean your sensor? That last shot looks like it could use it. I see a spot above and to the right of that center pier.
    I wet clean my canon when the dust blower can't remove it.
    CPL problems are always hit & miss with me. I get frustrated too
    Spook
    The spot you are referring to is a bird. The details captured by the a900 can be amazing. In the shot you're referring to, there is a bright spot towards the upper left. I zoomed in on the spot and saw that it was a jet.

    I've also taken back lit shots where the a900 captured light reflecting off of dust floating in the air ... Where it should be, not on my sensor.
    Darin Wessel
    α 900
    Zooms: Tamron SP AF70-200mm f2.8 Di LD Macro; Sigma 28-90mm D macro, Konica-Minolta 18-70 f3.5-5.6
    Primes: Minolta 28mm f2.8; Sony 50mm f1.4
    Minolta RC-1000 remote commander

    Film:
    Calumet Cambo CC400 4x5 View Camera
    YashikaMat 6x6 TLR (other accessories)
    Minolta Maxxum 7000 w/ Minolta 35-80mm f/4-5.6 & Minolta 2800 flash
    Minolta Maxxum 5000i & Vivitar 728 AFM flash
    What's next???

  6. #6
    Join Date
    Nov 2008
    Location
    Monmouthshire, UK
    Posts
    2,152
    Nah! Spook means the spot up above the support.
    The darkening of the corners is more apparent on the wide angle shot. It's vignetting caused by the filter edging into the shot.
    If you can't stand it you need a bigger filter with step-up ring.

  7. #7
    Join Date
    Mar 2009
    Location
    San Diego, CA
    Posts
    602
    Peek,

    Thanks for the advice on the CPL. And, now I get which spot that Spook was referring to.

    Spook,

    You asked, "Do you ever wet clean your sensor? That last shot looks like it could use it." I just got the a900 back in February. This was the first time since purchase that I got dust (or at least visible dust) on the sensor.

    I was able to blow the dust off this time. But, now I'm looking into spending the money for a good wet cleaning system.
    Darin Wessel
    α 900
    Zooms: Tamron SP AF70-200mm f2.8 Di LD Macro; Sigma 28-90mm D macro, Konica-Minolta 18-70 f3.5-5.6
    Primes: Minolta 28mm f2.8; Sony 50mm f1.4
    Minolta RC-1000 remote commander

    Film:
    Calumet Cambo CC400 4x5 View Camera
    YashikaMat 6x6 TLR (other accessories)
    Minolta Maxxum 7000 w/ Minolta 35-80mm f/4-5.6 & Minolta 2800 flash
    Minolta Maxxum 5000i & Vivitar 728 AFM flash
    What's next???

  8. #8
    Join Date
    Mar 2009
    Location
    San Diego, CA
    Posts
    602

    Post-cleaning via air blast.

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    Much better. The only problem now ... in looking for dust spots, I noticed my laptop screen has a couple of lcd crystals that create a grey spot. Great.
    Darin Wessel
    α 900
    Zooms: Tamron SP AF70-200mm f2.8 Di LD Macro; Sigma 28-90mm D macro, Konica-Minolta 18-70 f3.5-5.6
    Primes: Minolta 28mm f2.8; Sony 50mm f1.4
    Minolta RC-1000 remote commander

    Film:
    Calumet Cambo CC400 4x5 View Camera
    YashikaMat 6x6 TLR (other accessories)
    Minolta Maxxum 7000 w/ Minolta 35-80mm f/4-5.6 & Minolta 2800 flash
    Minolta Maxxum 5000i & Vivitar 728 AFM flash
    What's next???

  9. #9
    Join Date
    Jun 2008
    Posts
    2,204
    Quote Originally Posted by Spookonthe8ball View Post
    Do you ever wet clean your sensor? That last shot looks like it could use it. I see a spot above and to the right of that center pier.
    I wet clean my canon when the dust blower can't remove it.
    CPL problems are always hit & miss with me. I get frustrated too
    Spook
    Do you use Eclipse E2 solution and swabs??
    flickr

    Canon 7D - 5D | 550EX - 430EX II - (2) PW FlexTT5 | 24-105 f4L | 70-200 f2.8L IS | 100 f2.8L IS | 50 f1.8 II

  10. #10
    Join Date
    Jun 2007
    Location
    Oklahoma
    Posts
    530
    Darin, that cleaned up nicely. Great shot.
    We get a lot of pollen around here and sometimes air won't remove it.
    I use the Eclipse products. It takes two bottles for me since my old Xti used a different one than the 50D. The cleaning swabs work well for both. I also use a gun bore light to assist looking at the sensor. It has a small flexible head and very bright light. The swabs also work well cleaning the mirror and I use kodak lens cleaner for that.
    Spook
    Canon EOS 50D,7D and some lens and equipment.
    Fuji F200 Exr

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