reflector mirror issue

Discussion in 'Beyond the Basics' started by Cdeep04, Nov 7, 2005.

  1. Cdeep04

    Cdeep04 TPF Noob!

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    Could a damaged or bad reflector mirror from my lens cause my immage or pic to look over exposed in parts, such as when the in the picture the sky lit area is over exposed as comparied to the rest of the picture.

    I took my pictures to a couple of guro photographers around town and that was one idea they came up with.

    This only happens with this particular lens of mine.

    So I thougth I might ask you guys and see what you thought.
     
  2. KevinR

    KevinR TPF Noob!

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    What kind of lens and camera is this?
     
  3. Cdeep04

    Cdeep04 TPF Noob!

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    Its a Cannon nFTB and is a Sigma zoom Lens 39-80mm. All older stuff.
     
  4. Marctwo

    Marctwo TPF Noob!

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    I can't imagine how the mirror would be to blame. More likely a dodgy shutter, I'd say.

    Do you have an example you can post?
     
  5. KevinR

    KevinR TPF Noob!

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    The lens does not have a mirror in it. I would figure that if you are having trouble with only that lens, then it's a problem with the apeture not stopping down correctly. It may be letting light through or its stuck or slow in closing down.
     
  6. jstuedle

    jstuedle No longer a newbie, moving up!

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    I agree, check to see if the aperture is stuck, sticky or has oil on the blades of that lens. Good Luck.
     
  7. Cdeep04

    Cdeep04 TPF Noob!

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    I didnt think it had a mirror, but who am I to really know.


    Anyway if I can get it to work here are some examples of what Im talking about......alright so i dont get how to load images. I read how to do it on your site. I have a host at flickr.com but not sure how to enter it into this site. I think some of my problem is that I am using a Mac not a PC.
     
  8. Cdeep04

    Cdeep04 TPF Noob!

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  9. craig

    craig TPF Noob!

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    Utah!!!!!!!!!! I love that state!!!! The mirror just lets you view the scene through the shooting lens right side up. Then flips during the exposure. The shots are contrasty. One thought is that the film could not handle the exposure latitude. Meaning that there was too big of a difference between the shadow and highlights. Maybe try a proper test. Or at least shoot in flatter light and see how things go. Of course viewing photos over the net has a lot of variables. I would stick with viewing the print during said tests.
     
  10. Unimaxium

    Unimaxium TPF Noob!

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    That just looks like a combination of poor exposure and lens flare to me. Well, not necesarily poor exposure, but it looks like you were exposing the scene for the main subject of the photos, and as a result the very bright sky inevitably became overexposed. There also might be some lens flare involved, making the area around the bright sky wash out a bit too. Apart from that, I don't really think there's much wrong with the photos. It's not very uncommon for a photo to have some parts in it that are overexposed, due to the need to expose for a darker object in the scene. This especially happens when there's a dark subject and a bright sky in the shot.
     
  11. Cdeep04

    Cdeep04 TPF Noob!

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    Well i have other shots where I tried a lesser exposure time. Same thing happened but the subject got darker (of course) and i lost all the detail. I have a light meeter seperate from my camer cuz my batterie doesnt work and i havent made time to find a replacement yet. I thought it would be lens flair too but I seemed to happen in shots away or tword the sun. When I shoot on a flatter plain the same thing happens. THe brighter is too bright. Maybe im just being too picky. Thanks for the comment on Utah. I tend to like it too. =) All these shots are taken from up on USU Campus. But to tell you the truth my heart goes out to Western Washington, which is orginally where I am from.

    Thanks for all the sugestions so far. I would love to here more if any one has any.

    Maybe Ill just through away this lens and stick to my other. Its just a lens I found at Good Will for 15 dollars.
     
  12. craig

    craig TPF Noob!

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    Lenses vary greatly. Generally I have not found them to be the problem when exposure is concerned. Could be the way that you meter the scene. Hand helds' are great, but they may take a little practice (It has been a while since I used one). Understand what the meter is reading. The shadow and highlights should be read separately and then averaged by you. Film choice is also a major consideration. 50 ISO transparency film is super contrasty where the exposure needs to be within 1/3 of a stop perfect. 400 ISO neg could be within the 2-3 stop range.
     

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