Site Sponsors
Results 1 to 5 of 5

Thread: 645DF Focus Screen Options

  1. #1
    Member
    Join Date
    Jul 2013
    Posts
    134
    Post Thanks / Like

    645DF Focus Screen Options

    Focusing my 645DF is proving to be a problem for me. I've always had bad eyesight, but when corrected all was fine. But in the past couple of years I've found it increasingly more difficult to find the sweet spot in my varifocal lenses. So much so that's it's causing me a problem with this camera. With my Canon DSLRs, the AF is very fast and reliable. I don;t find that to be the case with my 645DF. The slower speed is easy to deal with. But I find myself having to "pump" the shutter button several times to make sure I've got accurate focus. I can't trust the camera focus confirmation beep nor can I trust what my eyes see in the viewfinder. Which leads to my question.

    What are my focus screen options? There was a thread from 2010 where Bill Caulfeild-Brrowne essentially had the same problem and asked the same question I'm asking. Marc Williams responded with info about Brightscreen products. Unfortunately, their owner passed away and it looks like they've gone out of business. So, would some kind soul please point me in a direction where I can investigate and hopefully purchase options that will aid in my ability to quickly and accurately manually focus my camera?

  2. #2
    Workshop Member
    Join Date
    May 2008
    Location
    NYC
    Posts
    3,274
    Post Thanks / Like
    Images
    7

    Re: 645DF Focus Screen Options

    Do you have the body set to precision or speed for the Autofocus custom function?

    Do you own the viewfinder magnifier?

    Have you tried the DF+? Focus is much improved?

    Have you spoken to Maxwell Precision Optics?
    Doug Peterson , Digital Transitions | Email
    Dealer for: Phase One, Mamiya Leaf, Arca-Swiss, Cambo, Eizo, Profoto
    Office: 877.367.8537. Cell: 740.707.2183

  3. #3
    Member
    Join Date
    Jul 2013
    Posts
    134
    Post Thanks / Like

    Re: 645DF Focus Screen Options

    Quote Originally Posted by dougpeterson View Post
    Do you have the body set to precision or speed for the Autofocus custom function?
    Nope. Just found out about it a few hours ago. Will test over the next several days.
    Do you own the viewfinder magnifier?
    Nope. These are the kind of options I was hoping to discover.
    Have you tried the DF+? Focus is much improved?
    I've heard various thing about the significance of this. Some think it's significant, others not.
    Have you spoken to Maxwell Precision Optics?
    Never heard of 'em. Again, this is what I wanted to discover. So I'll look them up and contact them.

    Thanks!

  4. #4
    Member
    Join Date
    Jul 2013
    Posts
    134
    Post Thanks / Like

    Re: 645DF Focus Screen Options

    Maxwell Precision Optics doesn't seem to have a web site. Do they or am I just not finding it?

  5. #5
    Senior Member kdphotography's Avatar
    Join Date
    Aug 2008
    Location
    Carmel/Tucson
    Posts
    2,354
    Post Thanks / Like

    Re: 645DF Focus Screen Options

    This might be a starting point.

    Unofficial Maxwell Precision Optics Webpage

    Bill Maxwell (404) 244-0095

    Maxwell Precision Optics
    P.O. 33146
    Decatur, GA
    30033-0146

    [email protected]

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
  •