Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,937   Posts: 1,585,632   Online: 717
      
Page 1 of 2 12 LastLast
Results 1 to 10 of 20
  1. #1

    Join Date
    Feb 2012
    Shooter
    Med. Format RF
    Posts
    1

    Sekonic L-358 Reading Compensation?

    Hi I just got a Sekonic L-358 (my first handheld meter) and will be shooting with my Mamiya 7/80mm, probably Ektar 100, and Fuji 400H, and maybe some slide film as well.

    I am wondering, if the meter is accurately calibrated, should I be compensating the readings at all? Or should I set my EV to what is read on the L-358?

    Reason I ask is I just read some things online about the Sekonics (and other meters) being calibrated for 12.5% grey, whereas a grey card is 18%... Has me a bit confused.

    I understand that there are creative decisions involved in setting the EV but as a baseline, I want to make sure I am starting off correctly.

    I will be shooting a variety of outdoor scenes.

  2. #2
    CGW
    CGW is offline

    Join Date
    Apr 2010
    Shooter
    Medium Format
    Posts
    2,797
    Do you have any reason to think your meter is "off?"

    If not, then don't get into a frothing OCD fit over the slim possibility your meter needs calibration. Though I believe you can dial in a fixed adjustment(I can on my 558), I'd make sure it's "zero-ed" with no +/- and leave it be.

    I have 3 Sekonics and none have ever disappointed in the accuracy dept. I'd put aside the chatter about baked-in inaccuracy and what the "real" gray card % is and make up your own mind. If you're shooting C-41 film, the material's latitude, especially for over-exposure, will absorb any slight metering/exposure anomalies. E6 is less forgiving but here, too, post-exposure processing can even things up.

    Just make sure you know how to take an incident reading. Bad technique can screw things up and might be a bigger worry than possible calibration issues with your meter.

  3. #3

    Join Date
    Jun 2011
    Shooter
    35mm
    Posts
    156
    I use me Seconic for incident metering whoch I dont think can be calibrated for gray card.
    I use the exact values it tells me and my exposures are spot on.

  4. #4
    Matthew Wagg's Avatar
    Join Date
    Aug 2011
    Location
    Sandiacre, Nottinghamshire, UK
    Shooter
    Multi Format
    Posts
    97
    I do have a problem with my 358 with ambient metering. So i'd be interested in seeing if there is a resolution to this.
    In the other modes its as accurate as accurate but in ambient mode its way out. The app in my android phone is more accurate than the sekonic.

  5. #5
    CGW
    CGW is offline

    Join Date
    Apr 2010
    Shooter
    Medium Format
    Posts
    2,797
    Quote Originally Posted by Matthew Wagg View Post
    I do have a problem with my 358 with ambient metering. So i'd be interested in seeing if there is a resolution to this.
    In the other modes its as accurate as accurate but in ambient mode its way out. The app in my android phone is more accurate than the sekonic.
    Accurate in what other modes? Flash? Reflected? "Way out" by how much?

  6. #6

    Join Date
    May 2006
    Location
    Aurora, IL
    Shooter
    35mm
    Posts
    1,992
    Sekonic and Minolta have different calibration standard but the difference is only about 1/6 stop. Besides that it's difficult to tell if the meter is accurate unless you have a known good meter to compare with or the meter is way off that you can tell by compare with sunny 16 rule or something like that.

  7. #7
    Matthew Wagg's Avatar
    Join Date
    Aug 2011
    Location
    Sandiacre, Nottinghamshire, UK
    Shooter
    Multi Format
    Posts
    97
    The corded flash and auto reset flash modes are accurate. I only meter in incident mode as I am mostly a portrait photographer.

    It is in the ambient mode that it is out. Both in shutter priority and apeture priority modes. I just stepped outside and took an incident reading at iso 400 @f4. The Sekonic reads 1/160. My phone's meter read 1/125 which is what my dslr read the scene at as well. It doesn't just over expose though, it can and has underexposed a scene by 3 stops before when I relied on it to meter with my C330. I pretty much just got a roll of blackness back from then.

  8. #8
    CGW
    CGW is offline

    Join Date
    Apr 2010
    Shooter
    Medium Format
    Posts
    2,797
    Quote Originally Posted by Matthew Wagg View Post
    The corded flash and auto reset flash modes are accurate. I only meter in incident mode as I am mostly a portrait photographer.

    It is in the ambient mode that it is out. Both in shutter priority and apeture priority modes. I just stepped outside and took an incident reading at iso 400 @f4. The Sekonic reads 1/160. My phone's meter read 1/125 which is what my dslr read the scene at as well. It doesn't just over expose though, it can and has underexposed a scene by 3 stops before when I relied on it to meter with my C330. I pretty much just got a roll of blackness back from then.
    Just to be sure: ambient=incident. You're using the dome fully extended? Your dslr is giving a reflected light reading and it will vary from a 358 incident reading. Just make sure via the manual that there's no calibration or exposure adjustment dialed in. BTW, how do you take an incident reading?

  9. #9
    Matthew Wagg's Avatar
    Join Date
    Aug 2011
    Location
    Sandiacre, Nottinghamshire, UK
    Shooter
    Multi Format
    Posts
    97
    Quote Originally Posted by CGW View Post
    Just to be sure: ambient=incident. You're using the dome fully extended? Your dslr is giving a reflected light reading and it will vary from a 358 incident reading. Just make sure via the manual that there's no calibration or exposure adjustment dialed in. BTW, how do you take an incident reading?
    Yes the dome is extended. I only use the dome retracted if I'm taking pictures of other pictures or paintings. When I'm metering I use a similar method to the Kirk Tuck and Vincent Laforet does when they're working. There are videos of them on the Sekonic site.

    I know the dslr is giving reflected but my phone's lightmeter agrees with the dslr and the histogram reading matches what I'd expect to see from the reading. But that's the digital side of things and we shouldn't talk of such things in here

    When I meter, for example in an indoor portrait session I will take mulitple readings from the top, front, sides and rear (usually around six seperate meter readings to check the light falloff is right and set my camera for the highlights. I like to know how much falloff I have around my models to control my light better.

    Doing the same thing in an outdoor session in the ambient metering mode on the 358 I get erratic readings similar to the ones I posted above.
    Say I'm using my OM2 and you have the +- symbols light up (reflected). When using my phone light meter they match up nicely when I set the OM2 to the settings on my phone. However on the Sekonic it will either register above or below (over and under exposing). That's ok when I have a relfected meter to fall back on in camera to ballpark my figures but with my C330 that doesn't have any metering I have to rely on external metering.

    I am thinking actually after explaining this, that I do have a problem with my sekonic. Thanks. I hope that this info is useful to someone else and I haven't just hijacked the Op's thread for nothing. Sorry about that by the way.

  10. #10

    Join Date
    May 2006
    Location
    Aurora, IL
    Shooter
    35mm
    Posts
    1,992
    the reading that you posted is only a third stop difference from your DSLR and it's a reflective vs incident as well isn't much of a difference. Now a third stop is a big difference if the readings are compared with the same type and of the same meter pattern, angle of view etc.. but for 2 different types of reading it's kinda unknown.

Page 1 of 2 12 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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