Site Sponsors
Results 1 to 9 of 9

Thread: H5D50 back on tech camera at 1/500

  1. #1
    Member
    Join Date
    Nov 2011
    Posts
    96
    Post Thanks / Like

    H5D50 back on tech camera at 1/500

    For anyone using an H5D50 back on a tech camera: have you tried it at 1/500? Do you get a slight overall purplish tint and a little bit of noise and ghosting in the image? There's a known issue with Hasselblad digital backs syncing correctly with Copal shutters at top shutter speeds. (When shooting with the lens synced directly to the back, and the back set at FlashSync <1/8s.)

    It's much improved on the H5D backs, but it's not gone altogether. The workaround is to fire the back first via cable release (for, say, 2 sec.), then trigger the shutter while the back is exposing for those 2 seconds. It's like doing a wakeup procedure on a Phase back. And other than at top shutter speeds, the Hasselblad back needs no wakeup.

    My question is, has anyone found a solution to this issue? Does it help to use the new Hasselblad battery adapter? Does the issue vanish at speeds of, say, 1/125 and slower? Does the Alpa sync release or Kapture Group release help?

    thanks
    ethan
    Last edited by epforever; 21st June 2015 at 21:43.

  2. #2
    Senior Member stngoldberg's Avatar
    Join Date
    Apr 2011
    Location
    newport, RI
    Posts
    808
    Post Thanks / Like
    Images
    12

    Re: H5D50 back on tech camera at 1/500

    I have the battery adapter (so much more convenient than dragging around an external power source) but have never experienced what you describe on my Rm3di combination with the H5d50 at any shutter speed including 1/500 sec
    Stanley

  3. #3
    Member
    Join Date
    Nov 2011
    Posts
    96
    Post Thanks / Like

    Re: H5D50 back on tech camera at 1/500

    Quote Originally Posted by stngoldberg View Post
    I have the battery adapter (so much more convenient than dragging around an external power source) but have never experienced what you describe on my Rm3di combination with the H5d50 at any shutter speed including 1/500 sec
    Stanley
    Stanley -- that's great to hear. Can you tell me how exactly the kit is rigged together? Meaning:

    - you're connecting the lens's PC sync terminal directly to the H5D50 back via a cable?
    - the lens is in a Copal shutter?
    - you have the back set to "Flash Sync <1/8 sec"?
    - you fire the lens using a cable release into the lens, just as you would a 4x5 camera?

    Finally, are you sure there's no purplish cast when shooting at 1/500? It's not an LCC issue. It is a subtle purple/magenta hue across the image.

    Thanks for your input.

    ethan

  4. #4
    Senior Member
    Join Date
    Mar 2012
    Location
    Sweden
    Posts
    1,538
    Post Thanks / Like

    Re: H5D50 back on tech camera at 1/500

    I'd recommend to test it like this, 1) shoot an LCC shot at 1/500 with a 70mm or longer lens (minimum color cast) then at the same occassion shoot an LCC shot at 1/125 or longer shutter speed (adjust aperture to match) and then A/B compare the two images. A pure white surface makes it easier to see.

    I've tested my H4D-50 and it has a magenta cast problem at 1/500, but it's quite slight so it could easily be missed if you don't look for it specifically. I think it's a hardware issue with the Kodak so I would be surprised if Hasselblad has succeeded improving this property to the H5D-50, therefore I too would be interested in a double-check on that.

    As I always shoot on tripod with small apertures I never get down to 1/500 so I don't suffer from this property myself, but it's a good thing to know when getting a Kodak Hassy, it can be important if you intend to shoot say an Alpa hand-held wide aperture. The older 39 and 22 backs have the same issue. The 60MP Hassy backs has the Dalsa sensor and should not have the issue AFAIK.
    Thanks 1 Member(s) thanked for this post

  5. #5
    Member
    Join Date
    Jan 2009
    Location
    Jeddah / Saudi Arabia
    Posts
    126
    Post Thanks / Like

    Re: H5D50 back on tech camera at 1/500

    Cannot comment on the H5D50, but the ALPA sync release cable/adapter solved that issue on my H4D50 back.

    Regards, Udo
    Thanks 1 Member(s) thanked for this post

  6. #6
    Senior Member
    Join Date
    Mar 2012
    Location
    Sweden
    Posts
    1,538
    Post Thanks / Like

    Re: H5D50 back on tech camera at 1/500

    To add to my report, it was done on a standard copal shutter with a standard sync cable on my Linhof Techno. I'm not familiar with the workarounds or Alpa sync cables as I've never needed to care in my type of work. As there is a solution that works for H4D-50 on the Alpa as reported by Udo above it seems highly likely that it will work for the H5D-50 too, any other would be most surprising as the H5D is a newer model, but of course you never now until someone checks...

  7. #7
    Senior Member stngoldberg's Avatar
    Join Date
    Apr 2011
    Location
    newport, RI
    Posts
    808
    Post Thanks / Like
    Images
    12

    Re: H5D50 back on tech camera at 1/500

    Quote Originally Posted by epforever View Post
    Stanley -- that's great to hear. Can you tell me how exactly the kit is rigged together? Meaning:

    - you're connecting the lens's PC sync terminal directly to the H5D50 back via a cable?
    YES
    - the lens is in a Copal shutter
    YES
    - you have the back set to "Flash Sync <1/8 sec"?
    YES
    - you fire the lens using a cable release into the lens, just as you would a 4x5 camera?
    YES

    Finally, are you sure there's no purplish cast when shooting at 1/500? It's not an LCC issue. It is a subtle purple/magenta hue across the image.


    Stanley

    Thanks for your input.

    ethan
    Sorry, I just don"t see it. Perhaps too subtle for me to notice

    Stanley

  8. #8
    Senior Member
    Join Date
    Mar 2012
    Location
    Sweden
    Posts
    1,538
    Post Thanks / Like

    Re: H5D50 back on tech camera at 1/500

    As far as I understand the variability of Copal shutters means that timing in terms of sync signal in relation to the shutter open/close can vary a bit sample-to-sample, which means that Hassy's fast sync may work for some shutters and not for others... I'm not 100% sure this is the case, but I think I've read/heard something along those lines somewhere.

  9. #9
    Member
    Join Date
    Nov 2011
    Posts
    96
    Post Thanks / Like

    Re: H5D50 back on tech camera at 1/500

    Thanks, all. I'll try the alpa sync release and other copoal shutters as well.

Posting Permissions

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