Site Sponsors
Results 1 to 16 of 16

Thread: Long Exposure with SWA

  1. #1
    Senior Member
    Join Date
    Apr 2008
    Location
    Englewood, NJ
    Posts
    528
    Post Thanks / Like

    Long Exposure with SWA

    I have never done any long exposure photography, not even with 35mm camera.
    I really like to learn it since I now have Alpa SWA and P25+.
    I have bought Feisol 3441S, and RRS BH-40 with pano clamp.

    Is there a shutter release cable to hold the lens' shutter open for long exposure?

    Also, it it necessary to have 10 stop ND filter for doing long exposure during bright daytime?

    I'd appreciate if someone can give a link to learn about the long exposure on Alpa with DB....

    I'm sorry for newbie questions...

  2. #2
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Florida, USA
    Posts
    4,499
    Post Thanks / Like
    Images
    141

    Re: Long Exposure with SWA

    It depends how long? It is not that hard to figure out how long your exposures would be as every stop doubles it. At f/16:

    0 stop 1/100 at ISO 100
    1 stop 1/50
    2 stop 1/30
    2 stop 1/15
    3 stop 1/8
    4 stop 1/4
    5 stop 1/2
    6 stop 1
    7 stop 2
    8 stop 4
    9 stop 8
    10 stop 16

    Actually, I would recommend the Hoya NX400 9-stop ND filter. It is actually possible to compose through it. The IR contamination is not bad. Most of my exposures are in the 10 sec to 30 sec range which is long enough. And it is not expensive.

    Or look at stacking ND filters. The Tiffen IRND series is good for that. They also are good to prevent IR contamination.
    Last edited by Shashin; 30th May 2013 at 08:06.

  3. #3
    Senior Member
    Join Date
    Apr 2008
    Location
    Englewood, NJ
    Posts
    528
    Post Thanks / Like

    Re: Long Exposure with SWA

    Thank you for the kind input...

    In order for me to have... Let say.... 2 minute exposure...,
    Don't I need a shutter release cable connected to the lens' shutter?
    So I can press it for 2 minutes...

  4. #4
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Florida, USA
    Posts
    4,499
    Post Thanks / Like
    Images
    141

    Re: Long Exposure with SWA

    You are definitely going to need a cable release. You will want to set your shutter to T where you press once to start the exposure and press again to end it.

  5. #5
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Florida, USA
    Posts
    4,499
    Post Thanks / Like
    Images
    141

    Re: Long Exposure with SWA

    You don't need 2 minutes either. The mist effect starts at about 5-10 seconds or so.

  6. #6
    Member GregMO's Avatar
    Join Date
    Sep 2012
    Location
    Washington DC
    Posts
    83
    Post Thanks / Like

    Re: Long Exposure with SWA

    Quote Originally Posted by paul25 View Post
    I have never done any long exposure photography, not even with 35mm camera.
    I really like to learn it since I now have Alpa SWA and P25+.
    I have bought Feisol 3441S, and RRS BH-40 with pano clamp.

    Is there a shutter release cable to hold the lens' shutter open for long exposure?

    Also, it it necessary to have 10 stop ND filter for doing long exposure during bright daytime?

    I'd appreciate if someone can give a link to learn about the long exposure on Alpa with DB....

    I'm sorry for newbie questions...
    I like the Linhof cable releases. They are a little more expensive then some other brands, but very smooth & the twist lock works well & doesn't slip. The ND filter(s) required will really depend on how long you want to run your shutter speed for the specific shot. I have 2 stop & 10 stop filters and sometimes stack both of them together. You can also play with your F stop get to the time needed.

  7. #7
    Senior Member
    Join Date
    Apr 2008
    Location
    Englewood, NJ
    Posts
    528
    Post Thanks / Like

    Re: Long Exposure with SWA

    Awesome....
    Thank you for the Infos....

    So, basically I don't have to set anything on the camera or on the digital back when doing long exposure... Right?

    Set the lens for f/11 or f/16
    Cock the lens
    Wake up the DB
    Press the shutter release for whatever the time I want....

    Basically, that is it...?

  8. #8
    Member GregMO's Avatar
    Join Date
    Sep 2012
    Location
    Washington DC
    Posts
    83
    Post Thanks / Like

    Re: Long Exposure with SWA

    Quote Originally Posted by paul25 View Post
    Awesome....
    Thank you for the Infos....

    So, basically I don't have to set anything on the camera or on the digital back when doing long exposure... Right?

    Set the lens for f/11 or f/16
    Cock the lens
    Wake up the DB
    Press the shutter release for whatever the time I want....

    Basically, that is it...?
    I shoot with film, so I don't know the specifics for using a digital back. Meter your scene to expose for the desired subjects/ shadows/ highlights. Choose your F stop based on the dept of field needed. Then calculate the desired shutter speed to create you image. You can adjust the F stop some to change your exposure time. If f16 doesn't give you enough time, try f22.
    Bring a watch or use a timer phone app.

  9. #9
    Super Duper
    Senior Member
    Shashin's Avatar
    Join Date
    May 2011
    Location
    Florida, USA
    Posts
    4,499
    Post Thanks / Like
    Images
    141

    Re: Long Exposure with SWA

    Quote Originally Posted by paul25 View Post
    Awesome....
    Thank you for the Infos....

    So, basically I don't have to set anything on the camera or on the digital back when doing long exposure... Right?

    Set the lens for f/11 or f/16
    Cock the lens
    Wake up the DB
    Press the shutter release for whatever the time I want....

    Basically, that is it...?
    It is just a little trial and error. Take an image and see the result. If it is not right, repeat.

  10. #10
    Senior Member
    Join Date
    Apr 2013
    Posts
    398
    Post Thanks / Like

    Re: Long Exposure with SWA

    Quote Originally Posted by paul25 View Post
    I have never done any long exposure photography, not even with 35mm camera.
    I really like to learn it since I now have Alpa SWA and P25+.
    I have bought Feisol 3441S, and RRS BH-40 with pano clamp.

    Is there a shutter release cable to hold the lens' shutter open for long exposure?

    Also, it it necessary to have 10 stop ND filter for doing long exposure during bright daytime?

    I'd appreciate if someone can give a link to learn about the long exposure on Alpa with DB....

    I'm sorry for newbie questions...
    Hi, copal shutters have a T setting next down from B. You press the shutter once to open it and then once more to close it whenever you want to end the exposure. I dont think there is a limit.

    I dont use a 10 stop filter anymore but generally with it I got about 30 sec exposures, iso 100, f16 in full sunlight with a bright scene. I get a lot more versatility by having a 4 stop and a 6 stop or 2 4 stop.

  11. #11
    Administrator, Instructor Guy Mancuso's Avatar
    Join Date
    Oct 2007
    Location
    Arizona
    Posts
    23,623
    Post Thanks / Like
    Images
    2555

    Re: Long Exposure with SWA

    No limit on T settings. Its opened as long as you keep it there. I would not store lens like that though.

    Im with you on the 4 or 6 stop ND filters as well. Sometimes 10 stops is just to long and not needed.
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

  12. #12
    Administrator, Instructor Guy Mancuso's Avatar
    Join Date
    Oct 2007
    Location
    Arizona
    Posts
    23,623
    Post Thanks / Like
    Images
    2555

    Re: Long Exposure with SWA

    I might be wrong on storing Copal shutters . Trying to find the answer
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

  13. #13
    Senior Member stephengilbert's Avatar
    Join Date
    Nov 2007
    Location
    Santa Monica, CA
    Posts
    2,274
    Post Thanks / Like
    Images
    2

    Re: Long Exposure with SWA

    I thought I'd read somewhere that Copals should be stored set at T. A Google search shows that there's some disagreement, but it seems at least that shutters should be stored uncocked. One poster pointed out that new Copals come from the factory uncocked and set at T. A repair guy says this:

    Q What's the best way to store a shutter?

    A Keep it in a dry area (off the floor if it's cement, like in a garage). Best to set the speed dial on "T" or "B" and uncocked so there is no tension on the springs.

    To keep the shutter in shape, you should take it out and exercise it at least once a month, running through once at each speed, and at least 10 times at the lower speeds, to get that slow gear governor moving. Even if you're too busy or have too many shutters... get them out once in a while throughout the year and exercise them or they'll become sluggish over time.


    F L U T O T ' S*** Helpful Tips

  14. #14
    Subscriber & Workshop Member GrahamWelland's Avatar
    Join Date
    Nov 2007
    Location
    Vancouver, WA
    Posts
    5,802
    Post Thanks / Like
    Images
    564

    Re: Long Exposure with SWA

    When it comes to long exposure it really depends on what you are looking to achieve. I do this pretty regularly and in fact the primary reason for my having the P25+ is for this exact type of shooting since it isn't limited to a short maximum exposure, unlike my IQ160.

    As mentioned, you want to use the T setting on your copal shutter. Any shutter release cable will work although if you are triggering your P25+ you'll either have something like a dedicated pre-trigger cable or a KG One Shot (or Alpa release).

    For daytime shooting where I want to create some movement in the sky & make moving water really silky smooth I'll shoot for 1 - 10 minutes. These time frames will blur things like any traffic too but you can experiment to get the moving cloud look you're after. I tend to bracket, although using the exposure duration and filtration to get the look that I want. Once you get to 30-60 minutes you'll be making people and moving objects completely disappear in even busy urban environments.

    I use either LEE filters (10 stop big stopper & 3 stop pro glass ND with IR block) or Tiffen IRND filters - 6 & 7 stop in 77/82mm or a combo with a B+W 10 stop ND.

    The main things to watch out for light leaks/glare with the filters and heat build up/noise with the P25+.

    If you use an iPhone then you might find a little free app called LongTime useful. I typically shoot a normal shot of my scene using the Alpa to establish the base exposure and then either use LongTime to tell me easily the amount of filtration needed for a certain exposure length or alternatively the total exposure needed for a particular filter amount. It's a lot easier than doubling exposures etc in your head (not that this is exactly hard either!).

    This might be helpful regarding filters:
    http://www.getdpi.com/forum/442289-post9707.html

    Also, if you're shooting very long exposures you'll get through batteries. For night work I use a Canon CH-910 battery pack:
    http://www.getdpi.com/forum/medium-f...tml#post482193
    Last edited by GrahamWelland; 30th May 2013 at 22:58.
    Remember: adventure before dementia!

    As Oscar Wilde said, "my tastes are simple, I only like the best"

  15. #15
    Member
    Join Date
    Apr 2013
    Posts
    83
    Post Thanks / Like

    Re: Long Exposure with SWA

    May I add, it is the multi switch cable.
    the white button just for wake up the digital back and
    the black button is use for multiple exposure.(two or more image in one single frame)
    Sunchai


  16. #16
    Member
    Join Date
    Apr 2013
    Posts
    83
    Post Thanks / Like

    Talking Re: Long Exposure with SWA

    RB camera with RB shift adapter + 90mm RB lens capture on Phase One P20 with the multi switch cable. exposure at f8 1/250. It was 3 exposures, 2 exposures at the first position and 1 exposure at the second position

Tags for this Thread

Posting Permissions

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