Results 1 to 18 of 18

Thread: Some question on dust on lens..

  1. #1

    Default Some question on dust on lens..

    Hi fellow Clubsnappers,

    I've got some noob questions on lens.
    I have just gotten a second hand 50mm f1.8 series E prime lens.
    I got home and notice some dust specks in the lens. I have consulted the seller and he says not to worry abt the dust speckles as it wont show up.
    I know this is a old lens and some dust are inevitable, but still i am pretty worried that the dust specks will appear in my exposures. I will be using this lens on a nikon FM2. I have yet to develop any films with using this lens. Any advice from expert clubsnappers?

    Thank you for your time,
    godprint

  2. #2

    Default Re: Some question on dust on lens..

    The dust on the lens may only appear at extremely small aperture such as F/14 and above so dont worry
    Canon EOS 30D , EF 17-40mm F4L USM , EF-S 55-250mm F/4-5.6 IS

  3. #3

    Default Re: Some question on dust on lens..

    Oh ok ok.. I got no digital camera to mount it on a try... need to wait till i develop my first roll of film. Thanks. So its actually inevitable that dust will always be trapped inside the lens rite?

  4. #4
    Senior Member Kit's Avatar
    Join Date
    Jan 2002
    Location
    Upper Bukit Timah
    Posts
    11,650

    Default Re: Some question on dust on lens..

    Quote Originally Posted by eosdigital View Post
    The dust on the lens may only appear at extremely small aperture such as F/14 and above so dont worry
    That's inaccurate. Dust on camera sensors will show up on photos when stopped down. Dust on lenses hardly show up at all.

  5. #5
    Senior Member Kit's Avatar
    Join Date
    Jan 2002
    Location
    Upper Bukit Timah
    Posts
    11,650

    Default Re: Some question on dust on lens..

    Quote Originally Posted by godprint View Post
    Oh ok ok.. I got no digital camera to mount it on a try... need to wait till i develop my first roll of film. Thanks. So its actually inevitable that dust will always be trapped inside the lens rite?
    You never get a lens without any specks of dust in it.

  6. #6

    Default Re: Some question on dust on lens..

    Quote Originally Posted by Kit View Post
    That's inaccurate. Dust on camera sensors will show up on photos when stopped down. Dust on lenses hardly show up at all.
    In a way, yes. But in strong lighting condition, i've photos where the dust in my lens did indeed turn up on my photos.Which is why i used the phrase "may" since im not really certain

    TS = Yes, Dust is inevitable. But u can do ur part by minimising the exposure by subjecting it to harsh environment(beach, sand etc) less often and changing the lens at a dust-free or minimal area. And lastly keep the lens in a dry cabinet and dust wont be really an issue any more
    Canon EOS 30D , EF 17-40mm F4L USM , EF-S 55-250mm F/4-5.6 IS

  7. #7
    Moderator catchlights's Avatar
    Join Date
    Sep 2004
    Location
    Punggol, Singapore
    Posts
    21,902

    Default Re: Some question on dust on lens..

    Quote Originally Posted by eosdigital View Post
    In a way, yes. But in strong lighting condition, i've photos where the dust in my lens did indeed turn up on my photos.Which is why i used the phrase "may" since im not really certain

    TS = Yes, Dust is inevitable. But u can do ur part by minimising the exposure by subjecting it to harsh environment(beach, sand etc) less often and changing the lens at a dust-free or minimal area. And lastly keep the lens in a dry cabinet and dust wont be really an issue any more
    really? then the dust in your lens must be very very big, big enough for spend some money to clean it.
    Shoot to Live, Live to Shoot
    www.benjaminloo.com | iStock portfolio

  8. #8

    Default Re: Some question on dust on lens..

    rear element, yes. front element, no.
    [Canon EOS 5D II + 40D | EF 16-35mm f/2.8L II + 70-200mm f/2.8L IS II] [Fuji X-Pro1 + XF35mm f/1.4]

  9. #9

    Default Re: Some question on dust on lens..

    Wow, thanks for all the replies from ayou guys.. was really enriching...

    So i assume any lens, I wont be able to expect it dust free rite?
    I tried shining a light thru the lens and see the output of that on a piece of white paper to see if i can spot any light source being blocked by dust or not. Wont wat i do is really noob or not.. .

    If i got no dry cabinet or anything similar. can I use a air tight container and add in some of those small small sachets which will absorb moisture? Will this be able to help in any way?

    Quote Originally Posted by Kit View Post
    That's inaccurate. Dust on camera sensors will show up on photos when stopped down. Dust on lenses hardly show up at all.
    How do I identify it its on the camera sensor? What is a camera sensor located? very noob of me....
    Last edited by godprint; 24th August 2008 at 12:30 PM.

  10. #10

    Default Re: Some question on dust on lens..

    A dry cabinet doesn't cost much, neither does the electricity it runs on.
    For ease and peace of mind, I suggest you get a dry cabinet instead of fiddling around with silica gels.

  11. #11

    Default Re: Some question on dust on lens..

    Quote Originally Posted by godprint View Post
    Wow, thanks for all the replies from ayou guys.. was really enriching...

    So i assume any lens, I wont be able to expect it dust free rite?
    I tried shining a light thru the lens and see the output of that on a piece of white paper to see if i can spot any light source being blocked by dust or not. Wont wat i do is really noob or not.. .

    If i got no dry cabinet or anything similar. can I use a air tight container and add in some of those small small sachets which will absorb moisture? Will this be able to help in any way?



    How do I identify it its on the camera sensor? What is a camera sensor located? very noob of me....
    The camera sensor is what captures the image, akin to the film in film cameras.

    A basic way to identify dust is to shoot a blank & white image(i.e wall) at the max smallest apertue (f/22+ depending on lens) and then zoom in the max in-camera or PC and look for some strange black dots/particles. Thats the dust.

    To know if it's on the lens or sensor, simply change the lens and repeat. If the dust spot still persists at the same spot. It's the sensor/particular film frame(sry for mistake)
    Last edited by eosdigital; 25th August 2008 at 05:45 PM.
    Canon EOS 30D , EF 17-40mm F4L USM , EF-S 55-250mm F/4-5.6 IS

  12. #12

    Default Re: Some question on dust on lens..

    Quote Originally Posted by eosdigital View Post
    The camera sensor is what captures the image, akin to the film in film cameras.

    A basic way to identify dust is to shoot a blank & white image(i.e wall) at the max smallest apertue (f/22+ depending on lens) and then zoom in the max in-camera or PC and look for some strange black dots/particles. Thats the dust.

    To know if it's on the lens or sensor, simply change the lens and repeat. If the dust spot still persists at the same spot. It's the lens
    Ooh.. I am actually using this lens on a SLR nikon fm2, so based on your explanation. I can say that camera sensor does not apply to SLR rite?

  13. #13

    Default Re: Some question on dust on lens..

    Quote Originally Posted by godprint View Post
    Ooh.. I am actually using this lens on a SLR nikon fm2, so based on your explanation. I can say that camera sensor does not apply to SLR rite?
    In a way, yes. But dust will still get onto your film, albiet that particular frame that is loaded when u exposed it to dust(i.e changing lens). So u dont have to worry about sensor dust anymore.
    Canon EOS 30D , EF 17-40mm F4L USM , EF-S 55-250mm F/4-5.6 IS

  14. #14

    Default Re: Some question on dust on lens..

    Quote Originally Posted by godprint View Post
    Hi fellow Clubsnappers,

    I've got some noob questions on lens.
    I have just gotten a second hand 50mm f1.8 series E prime lens.
    I got home and notice some dust specks in the lens. I have consulted the seller and he says not to worry abt the dust speckles as it wont show up.
    I know this is a old lens and some dust are inevitable, but still i am pretty worried that the dust specks will appear in my exposures. I will be using this lens on a nikon FM2. I have yet to develop any films with using this lens. Any advice from expert clubsnappers?

    Thank you for your time,
    godprint
    Don't worry, it will not show up unless it's a BIG SPEC of dust.

  15. #15

    Default Re: Some question on dust on lens..

    Quote Originally Posted by eosdigital View Post
    To know if it's on the lens or sensor, simply change the lens and repeat. If the dust spot still persists at the same spot. It's the lens
    I think you meant the sensor? But since TS is nikon SLR, its a moot point anyway.
    Last edited by ahbian; 24th August 2008 at 10:26 PM.

  16. #16
    Senior Member
    Join Date
    Jul 2006
    Location
    Clementi
    Posts
    10,596

    Default Re: Some question on dust on lens..

    Quote Originally Posted by godprint View Post
    Oh ok ok.. I got no digital camera to mount it on a try... need to wait till i develop my first roll of film. Thanks. So its actually inevitable that dust will always be trapped inside the lens rite?
    Yes it is more or less inevitable.

  17. #17

    Default Re: Some question on dust on lens..

    Ok ok.. thanks for all the information. Guess this dust stuck in between lens is a sticky issue.. especially for beginners like me. Have been worried abt it since the day I bought it till now. But after seeing those replies. More or less feel better at least till the time when i develop my first film using this lens.

  18. #18

    Default Re: Some question on dust on lens..

    Quote Originally Posted by ahbian View Post
    I think you meant the sensor? But since TS is nikon SLR, its a moot point anyway.
    Oops, yes i mean the camera. Sorry for the little mistake
    Last edited by eosdigital; 25th August 2008 at 05:45 PM.
    Canon EOS 30D , EF 17-40mm F4L USM , EF-S 55-250mm F/4-5.6 IS

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •