Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,919   Posts: 1,584,780   Online: 973
      
Page 2 of 2 FirstFirst 12
Results 11 to 20 of 20

Thread: f/3.5

  1. #11
    EASmithV's Avatar
    Join Date
    Aug 2008
    Location
    Maryland
    Shooter
    Multi Format
    Posts
    1,885
    Blog Entries
    4
    Images
    123
    Quote Originally Posted by keithwms View Post
    For negs I usually treat 3.5 as 4, so as to err on the side of slight overexposure. For slide, I treat 3.5 as 2.8, so as to err on the side of slight underexposure. You can of course also change the EI just a bit to compensate, as needed.

    Don't sweat the petty details, and don't pet the sweaty details.
    Got a present for you now

    Click image for larger version. 

Name:	4172132101_8e72e251ed_z.jpg 
Views:	34 
Size:	150.6 KB 
ID:	47823

    Taken somewhere in London
    www.EASmithV.com

    "The camera is an instrument that teaches people how to see without a camera."— Dorothea Lange
    http://www.flickr.com/easmithv/
    RIP Kodachrome

  2. #12
    Poisson Du Jour's Avatar
    Join Date
    Jul 2008
    Location
    Vic., Australia.
    Shooter
    Multi Format
    Posts
    3,692
    Images
    15
    Keith's vacation dig, obviously.
    “The photographer must determine how he wants the finished print to look before he exposes the negative.
    Before releasing the shutter, he must seek 'the flame of recognition,' a sense that the picture would reveal
    the greater mystery of things...more clearly than the eyes see."
    ~Edward Weston, 1922.

  3. #13
    keithwms's Avatar
    Join Date
    Oct 2006
    Location
    Charlottesville, Virginia
    Shooter
    Multi Format
    Posts
    6,079
    Blog Entries
    20
    Images
    129
    Haha. Only the very finest accommodations for me.

    What is that, provia in non-5000 K light, Eric?
    "Only dead fish follow the stream"

    [APUG Portfolio] [APUG Blog] [Website]

  4. #14
    Vaughn's Avatar
    Join Date
    Dec 2006
    Location
    Humboldt Co.
    Shooter
    8x10 Format
    Posts
    4,765
    Images
    40
    Quote Originally Posted by BrianL View Post
    My Weston has 3.5 on the dial; maybe they courted Rolleiflex users.
    I have a Graflex 22 -- a TLR with a Graftar 85mm/f3.5 taking lens. Made after Graflex bought out Ciroflex, I believe. So its f/stops go f3.5, 4, 5.6, etc...while an old Rolleiflex of mine goes straight from 3.5 to 5.6. No f4 marked.

    Vaughn
    At least with LF landscape, a bad day of photography can still be a good day of exercise.

  5. #15

    Join Date
    Sep 2002
    Location
    Oregon and Austria
    Shooter
    4x5 Format
    Posts
    883
    I like to use the one-third stop scale. I also often don't bother with the numbers, but just think of intermediate stops as "+" or "-" one-third of a stop from one of the whole-stops (e.g., f/5.6 +1/3).

    Question: do you really shoot at f/3.5? If so, then just think of it as f/4 + 1/3-stop (remember, smaller f-numbers = more exposure) Most meters are laid out in one-third stop increments so this should line right up with a mark on the meter somewhere. (Shutter speeds are not so easy though... if you're shooting wide open at f/3.5 then you'll have to pick a shutter speed that can be up to 2/3-stop off. You get to decide whether to over-or underexpose).

    @keith: I think you've got your exposure backwards -- f/4 is 1/3 stop underexposure from f/3.5 and f/2.8 is 2/3-stop over (assuming that f/3.5 is the "correct" stop).

    Best

    Doremus

    www.DoremusScudder.com

  6. #16
    ath
    ath is offline
    ath's Avatar
    Join Date
    Aug 2006
    Location
    Germany
    Shooter
    35mm
    Posts
    890
    And then there are manufacturers which call the half stop between f/4 and f/2.8 simply f/3.5.
    Regards,
    Andreas

  7. #17

    Join Date
    Jun 2003
    Shooter
    Large Format
    Posts
    16,887
    Quote Originally Posted by ath View Post
    And then there are manufacturers which call the half stop between f/4 and f/2.8 simply f/3.5.
    you make it so simple

  8. #18
    Roger Cole's Avatar
    Join Date
    Jan 2011
    Location
    Suburbs of Atlanta, GA USA
    Shooter
    Multi Format
    Posts
    4,211
    Quote Originally Posted by keithwms View Post
    For negs I usually treat 3.5 as 4, so as to err on the side of slight overexposure. For slide, I treat 3.5 as 2.8, so as to err on the side of slight underexposure. You can of course also change the EI just a bit to compensate, as needed.

    Don't sweat the petty details, and don't pet the sweaty details.
    But then you're overexposing neg film by 1/3 stop, which you will never notice, and underexposing slide film by 2/3s stop, which you WILL notice.

    For neg film I too pretty much just treat it as f/4. If I'm shooting slide film hand held, I'm doing it in 35mm and have TTL metering anyway. If I'm shooting slide film in medium format I am probably working off a tripod or in decent light and won't be shooting my one medium format 3.5 lens (on my Yashicamat) wide open anyway. And in 4x5 I don't have any lenses that fast anyway. So for practical purposes it's a non-issue.

    Even slide film can generally handle 1/3 stop overexposure though it will change the look, but if you treat it as half way between 2.8 and 4 you will be only 1/6th stop off and even in slide film you won't notice that.

  9. #19
    EASmithV's Avatar
    Join Date
    Aug 2008
    Location
    Maryland
    Shooter
    Multi Format
    Posts
    1,885
    Blog Entries
    4
    Images
    123
    Quote Originally Posted by keithwms View Post
    Haha. Only the very finest accommodations for me.

    What is that, provia in non-5000 K light, Eric?
    E200 pushed 1 stop, shot in twilight with a Nikon F and a 50 f1.4 pre ai
    Last edited by EASmithV; 03-18-2012 at 02:36 AM. Click to view previous post history.
    www.EASmithV.com

    "The camera is an instrument that teaches people how to see without a camera."— Dorothea Lange
    http://www.flickr.com/easmithv/
    RIP Kodachrome

  10. #20
    John Austin's Avatar
    Join Date
    Oct 2010
    Location
    Southern Forest Region, Western Australia
    Shooter
    Large Format
    Posts
    521
    Blog Entries
    3
    It's just a aperture, between f2.8 and f4
    Last edited by John Austin; 03-18-2012 at 03:48 AM. Click to view previous post history.

Page 2 of 2 FirstFirst 12


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin