Results 1 to 16 of 16

Thread: changing lens

  1. #1
    Member
    Join Date
    Sep 2004
    Location
    serangoon area
    Posts
    319

    Default changing lens

    if you change lens with a fan blowing strongly from the rear of the camera(opposite from the lens mount opening), will it minimize dust going into the chamber or will there be a vacumn and draw in more dust? any engineering guru or someone with more common sense can comment?

    also, i assume toilet is the lease dusty place in the home to change lens...?

  2. #2

    Default

    Quote Originally Posted by aaron001
    if you change lens with a fan blowing strongly from the rear of the camera(opposite from the lens mount opening), will it minimize dust going into the chamber or will there be a vacumn and draw in more dust? any engineering guru or someone with more common sense can comment?

    also, i assume toilet is the lease dusty place in the home to change lens...?
    not true, indoors may be more dusty than you think, infact everywhere is dusty.

  3. #3

    Default

    i normally tilt the body down when changing lenses. it may lessen the dust from settling directly into the mirror.
    dust on the cmos/ccd is a very common thing for dslrs. we shd be more concern changing to a suitable lens on the go to get a good shot rather than worry about dust getting into the sensor.

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

    Default

    You are thinking too much. Just tilt your camera(mount facing downwards) when changing the lens.

  5. #5
    Member
    Join Date
    Apr 2004
    Location
    In my own world
    Posts
    1,314

    Default

    The camera can tolerate a little bit of dust, just like we r breathing in billions of germs every sec...

  6. #6
    Senior Member
    Join Date
    Dec 2003
    Location
    Cocteau Twins
    Posts
    2,116

    Default

    agree with likefunyouare. was once asked by someone, why do i settle for using a zoom lens rather than changing lenses. i replied 'scared of dust' ... and then realised how silly i sounded.

  7. #7

    Lightbulb

    Quote Originally Posted by Stereobox
    agree with likefunyouare. was once asked by someone, why do i settle for using a zoom lens rather than changing lenses. i replied 'scared of dust' ... and then realised how silly i sounded.
    agreed. paranoid about dust! use a OSIM water vacuum to suck all the dust from your camera body. he he!

  8. #8
    Member
    Join Date
    Nov 2003
    Location
    Northeast
    Posts
    1,226

    Default

    Quote Originally Posted by Stereobox
    agree with likefunyouare. was once asked by someone, why do i settle for using a zoom lens rather than changing lenses. i replied 'scared of dust' ... and then realised how silly i sounded.
    unless your lens is airtight, dust will be going in everytime you turn that zoom ring or use the autofocus...

  9. #9
    Senior Member
    Join Date
    Jan 2004
    Location
    Catchment Area
    Posts
    2,441

    Default

    Quote Originally Posted by justarius
    unless your lens is airtight, dust will be going in everytime you turn that zoom ring or use the autofocus...
    Just like to add that it depends on the type of lens:

    Type A: Constant length lens, for both zooming and focus (IF/RF) - very little dust gets in as there is no exchange of air during operation.

    Type B: Length of lens extends when you zoom and focus - everytime you zoom, air is sucked in, and creates a lot of turbulences that kick up lots of dust inside that would settle on your sensor.

    In general, the better designed lenses and the more expensive zooms and primes are of Type A. Also, Type A lenses tend to have their internal elements much cleaner after long use.

  10. #10
    Deregistered
    Join Date
    Dec 2002
    Location
    Planet Nikon
    Posts
    21,905

    Default

    Actually me worry more on getting the shot due to the time lag of changing len than worry about dust.

    There's always something called photoshop

  11. #11
    Senior Member
    Join Date
    Jan 2004
    Location
    Catchment Area
    Posts
    2,441

    Default

    Quote Originally Posted by espn
    Actually me worry more on getting the shot due to the time lag of changing len than worry about dust.

    There's always something called photoshop
    Yeah, totally agree to that. In the wakeboard shoot, I was shooting the main show with a lens, but during some waiting time, wanted to shoot some sideshow, but lens far too long for it. It kind of take far too long to change lens. A Sigma 100-300 F4 would be ideal. Not yet Buy, Buy Buy la.

  12. #12

    Default

    Quote Originally Posted by smallaperture
    Yeah, totally agree to that. In the wakeboard shoot, I was shooting the main show with a lens, but during some waiting time, wanted to shoot some sideshow, but lens far too long for it. It kind of take far too long to change lens. A Sigma 100-300 F4 would be ideal. Not yet Buy, Buy Buy la.
    2 bodies with 2 different range of zoom will be ideal

  13. #13
    Member
    Join Date
    Dec 2003
    Location
    Singapore
    Posts
    332

    Talking Changing lens in the toilet

    Quote Originally Posted by aaron001
    if you change lens with a fan blowing strongly from the rear of the camera(opposite from the lens mount opening), will it minimize dust going into the chamber or will there be a vacumn and draw in more dust? any engineering guru or someone with more common sense can comment?

    also, i assume toilet is the lease dusty place in the home to change lens...?
    I don't know if the toilet is the least dusty place to change lens but if it is, take extreme care not to drop your lens into the you-know-what.

  14. #14

    Default

    everywhere also dusty la...its a chance thing...if kena then too bad lo...i always change outdoors with no prob le...

  15. #15
    Senior Member jOhO's Avatar
    Join Date
    Apr 2003
    Location
    Singapore
    Posts
    6,485

    Default

    when i need to change lens, i dun have time to think about whether dust goes in.....

  16. #16

    Default

    For me, it depend on the situation.

    If u are in a place where there's a breeze blowing, i would rather let the reflex mirror face to wind, than the rear element of my lens.

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
  •