Vented Lens Hood

Discussion in '35mm Cameras and Accessories' started by CMoore, Dec 26, 2018.

  1. CMoore

    CMoore Subscriber
    Ads Enabled

    Messages:
    2,509
    Joined:
    Aug 23, 2015
    Location:
    USA CA 94585
    Shooter:
    35mm
    What is the purpose of this type of hood.?
    Sorry if "vented" is not the right term, but you guys know what i mean.
    They look like this...............

    Thank You


    [​IMG]
     
  2. Pentode

    Pentode Subscriber
    Ads Enabled

    Messages:
    401
    Joined:
    Feb 14, 2017
    Location:
    Brooklyn, NY
    Shooter:
    Multi Format
    They are meant for use on rangefinder and viewfinder cameras on which a normal, solid hood would block part of the frame when looking through the viewfinder. They’re actually quite effective.
     
  3. OP
    OP
    CMoore

    CMoore Subscriber
    Ads Enabled

    Messages:
    2,509
    Joined:
    Aug 23, 2015
    Location:
    USA CA 94585
    Shooter:
    35mm
    Sorry...never really used a Rangefinder.
    I realize they are not "through the lens" and the viewfinder is off-center of the lens.
    Are you saying you actually look through part or all of the Vent/Slat (of the lens hood) when using a Rangefinder type of camera.?
    Thanks Again
     
  4. Pentode

    Pentode Subscriber
    Ads Enabled

    Messages:
    401
    Joined:
    Feb 14, 2017
    Location:
    Brooklyn, NY
    Shooter:
    Multi Format
    Yes, that’s exacty right.
    You still see it in the frame, but it blocks so little of the viewfinder it doesn’t really get in the way of composing the image.
     
  5. jimjm

    jimjm Subscriber
    Ads Enabled

    Messages:
    633
    Joined:
    May 2, 2007
    Location:
    San Diego CA
    Shooter:
    Multi Format
    Some large and long lenses will block part of the view using some rangefinders, and having a hood attached just makes it worse. Vented hoods can make this less of a problem.
     
  6. OP
    OP
    CMoore

    CMoore Subscriber
    Ads Enabled

    Messages:
    2,509
    Joined:
    Aug 23, 2015
    Location:
    USA CA 94585
    Shooter:
    35mm
    I see...Very interesting... Thank You. :smile:
     
  7. Kiron Kid

    Kiron Kid Member
    Ads Enabled

    Messages:
    627
    Joined:
    Mar 26, 2005
    Shooter:
    35mm
    2AB8678A-3021-4130-8FFA-3D6C47B95258.jpeg Oly RC rangefinder.
     
  8. AgX

    AgX Member

    Messages:
    18,482
    Joined:
    Apr 5, 2007
    Location:
    Germany
    Shooter:
    Multi Format
    It is known that some lenses "breath". Those vents enable the necessary air stream.
     
  9. OP
    OP
    CMoore

    CMoore Subscriber
    Ads Enabled

    Messages:
    2,509
    Joined:
    Aug 23, 2015
    Location:
    USA CA 94585
    Shooter:
    35mm
    I realize the need to use it with a Rangefinder.
    Is there any "real" likelihood of this style causing a problem on a SLR.?
    Is it possible that the vents can also leak enough Light/Sun to cause problems or flares.?
    Thank You
     
  10. Pentode

    Pentode Subscriber
    Ads Enabled

    Messages:
    401
    Joined:
    Feb 14, 2017
    Location:
    Brooklyn, NY
    Shooter:
    Multi Format
    None whatsoever. It will work just fine on an SLR.
     
  11. John Koehrer

    John Koehrer Subscriber
    Ads Enabled

    Messages:
    7,447
    Joined:
    Apr 3, 2004
    Location:
    Aurora, Il
    Shooter:
    Multi Format
    Wonder what it's worth to someone with the RF 1.2?
     
  12. flatulent1

    flatulent1 Subscriber
    Ads Enabled

    Messages:
    1,434
    Joined:
    Oct 7, 2008
    Location:
    Seattle USA
    Shooter:
    Multi Format
    And I always thought it was for aerodynamics...
     
  13. Ko.Fe.

    Ko.Fe. Member
    Ads Enabled

    Messages:
    2,119
    Joined:
    Apr 29, 2014
    Location:
    MiltON.ONtario
    Shooter:
    35mm RF
    I need help to understand your question.
     
  14. Sponsored Ad
  15. AgX

    AgX Member

    Messages:
    18,482
    Joined:
    Apr 5, 2007
    Location:
    Germany
    Shooter:
    Multi Format
    That common lens shades are are not slitted has a reason: to give better shading.

    The best lens shade design is not only closed, long, but not vignetting, but also shaped according to aspect ratio. Something rare in still photograhphy, but common in cinematography.
     
  16. jim10219

    jim10219 Member
    Ads Enabled

    Messages:
    949
    Joined:
    Jun 15, 2017
    Location:
    Oklahoma
    Shooter:
    4x5 Format
    If you're using that style lens hood to close out the surrounding light while pushing the lens up against a pane of glass, like when you're trying to photograph fish at an aquarium without getting reflections in the glass, it can cause a problem. If the sun is directly behind you and shining light through the vent that's reflecting off the front lip of the hood, that can also cause a problem. But those are two rare circumstances.
     
  17. AgX

    AgX Member

    Messages:
    18,482
    Joined:
    Apr 5, 2007
    Location:
    Germany
    Shooter:
    Multi Format
    It depends how these slotted shades are designed. It seems most actually do not allow light from the side to enter the lens directly. Those indeed would work like a standard, closed shade. Except for the rare cases Jim just explained above.

    But are all those slotted shades that well designed? On many photos of these that is not clearly visible.

    Furthermore, if only using them on one lens, with stationary front ring, one could tape all unnecessary sloted parts.
     
  18. Kiron Kid

    Kiron Kid Member
    Ads Enabled

    Messages:
    627
    Joined:
    Mar 26, 2005
    Shooter:
    35mm
    I use them on all of my rangefinders. There is no reason to use them on SLR’s.
     
  19. Ko.Fe.

    Ko.Fe. Member
    Ads Enabled

    Messages:
    2,119
    Joined:
    Apr 29, 2014
    Location:
    MiltON.ONtario
    Shooter:
    35mm RF
    Not so rare among rangefinder lenses. Modern Leica made often have these hoods and third party 3d printed are available.
     
  20. jnantz

    jnantz Advertiser Advertiser
    Ads Enabled

    Messages:
    25,668
    Joined:
    Jun 21, 2003
    Location:
    paswonquitte
    Shooter:
    Multi Format
    funny, i always thought it was so if you were photographing a male or female HOTTIE the lens didn't get over heated...
     
  21. John Koehrer

    John Koehrer Subscriber
    Ads Enabled

    Messages:
    7,447
    Joined:
    Apr 3, 2004
    Location:
    Aurora, Il
    Shooter:
    Multi Format
    I don't think there are that many of that lens around and most of them are likely to not have the hood.
     
  22. MattKing

    MattKing Subscriber
    Ads Enabled

    Messages:
    23,962
    Joined:
    Apr 24, 2005
    Location:
    Delta, BC, Canada
    Shooter:
    Multi Format
    Were they not a reference to the design inspiration of DEVO? :whistling:

    [​IMG]
     
  23. jnantz

    jnantz Advertiser Advertiser
    Ads Enabled

    Messages:
    25,668
    Joined:
    Jun 21, 2003
    Location:
    paswonquitte
    Shooter:
    Multi Format
  24. Ko.Fe.

    Ko.Fe. Member
    Ads Enabled

    Messages:
    2,119
    Joined:
    Apr 29, 2014
    Location:
    MiltON.ONtario
    Shooter:
    35mm RF
    Sorry, but is clear as mud, still. Which lens you are talking about?

    RF lenses where made in hundreds of thousands and they are still made for the dark side, due to their compactness.
    Many of them are in use and with hoods. Because it helps with flare control.

    Vented and rectangular hoods are sold on ebay and from special new style 3-D printing shops.

    https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=vented+lens+hood&_sacat=0

    https://www.ebay.com/bhp/square-lens-hood
     
  25. Pentode

    Pentode Subscriber
    Ads Enabled

    Messages:
    401
    Joined:
    Feb 14, 2017
    Location:
    Brooklyn, NY
    Shooter:
    Multi Format
    I have a bunch of them for a variety of rangefinders, many of which are cheap Ebay/China knockoffs, and have not noticed any flaws in design. They do what they're supposed to do provided you match the right type of hood to the lens according to focal length.

    Unless, of course, you already own one and it fits on a lens for your SLR, in which case, why not?

    Ever tuned-in to the core principals of the design! :wink:
     
  26. abruzzi

    abruzzi Member

    Messages:
    359
    Joined:
    Mar 10, 2018
    Location:
    New Mexico, USA
    Shooter:
    Medium Format
    I think the reference was to the photo in the original post, which according to the printing is for a Canon 50mm f1.2. I don’t know how common a lens it is, or how common the hood is, but I can imagine that kind of original hardware might be hard to find and pricy.
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies. If you have a Photrio account, please log in (and select 'stay logged in') to prevent recurrence of this notice.