Page 1 of 3 123 LastLast
Results 1 to 10 of 23

Thread: Best loup for ground glass focusing?

  1. #1
    Ralph Upchurch's Avatar
    Join Date
    Nov 2006
    Location
    Brookline, MA
    Posts
    15

    Best loup for ground glass focusing?

    What is the best type of loup to use for focusing on ground glass? Opaque base? Clear base? What power is best?

    Thanks,

    Ralph

  2. #2
    Louie Powell's Avatar
    Join Date
    Sep 2003
    Location
    Saratoga Springs, NY
    Posts
    800

    Re: Best loup for ground glass focusing?

    Ralph -

    get the plaid one.

    Seriously, different people make different choices, and the right answer for you is what works best for you.

    I've heard it said that a 4x loupe is ideal - I use a 10x. Some people use an old camera lens (reversed) - a lens from an old super-8 movie camera is supposed to work well. Other people use drug store reading glasses. An opaque base might seem to make the most sense since you are viewing a subject by transmitted light, but if you are using a dark cloth, you won't have any light coming in from the sides that would make a clear base problematical.

  3. #3

    Join Date
    May 2006
    Location
    Westminster, MD
    Posts
    1,654

    Re: Best loup for ground glass focusing?

    Ralph

    As Louie says, get the plaid one.

    Eveyone is different. What works for me, you might not like.

    If you have a good camera shop near by, I recommend asking them if you can set up your system in their store so to try out a number of loupes. Boston should have one or two good camera stores with a wide selection.

    Personally I find opaque best 'cause I usually don't get a very tight seal between my 8x10 camera and the darkcloth. I use a higher power loupe for my 4x5 (10x) than my 8x10 (4x).

    Your results may very.

    Good luck and happy shooting.

  4. #4
    naturephoto1's Avatar
    Join Date
    Jul 2006
    Location
    Breinigsville, PA
    Posts
    573

    Re: Best loup for ground glass focusing?

    Hi Ralph,

    I have used a number of loupes over many years. For a long time I have used the Wista 7X Hood Lupe and it is probably now going to be replaced by my 4X Horizon Lupe with the black skirt in most instances.

    I ran a non scientific test of a series of loupes: 3 4X, 1 5X, 1 3X, 1 7X, and 1 8X loupe that I have in a thread at APUG. You may wish to read through the following thread:

    http://www.apug.org/forums/showthrea...=focusing+lupe

    Rich
    Richard A. Nelridge

    http://www.nelridge.com

  5. #5

    Join Date
    Jun 2002
    Posts
    9,476

    Re: Best loup for ground glass focusing?

    I like the Wista 9x hood loupe these days, it is 5 inches long so your nose isn't greasing up the ground glass.

    But a 4X is plenty strong enough for most work. I like the stronger mags for people because I can see their eyelashes. The opaque sleeves are best.

  6. #6

    Join Date
    Sep 1998
    Posts
    10,357

    Re: Best loup for ground glass focusing?

    Wista makes a loupe that attaches directly to the Wista back. The loupe portion comes with both clear (for viewing prints) and opaque (for viewing groundgalles and slides on light boxes. The loupe is supported by wires that allow the loupe to move anywhere over the 4x5 ground glass and stay there without having to hold it in your hand all the time. Once it is moved to the position that you need it both hands are free. It is 5x magnification and has an adjustable eyepiece. It will go up in price at the end of Jaanuary.

  7. #7

    Join Date
    Sep 1998
    Posts
    10,357

    Re: Best loup for ground glass focusing?

    Quote Originally Posted by Frank Petronio View Post
    I like the Wista 9x hood loupe these days, it is 5 inches long so your nose isn't greasing up the ground glass.

    But a 4X is plenty strong enough for most work. I like the stronger mags for people because I can see their eyelashes. The opaque sleeves are best.
    Frank. You mean 7x. Wista does not make a 9x.

  8. #8

    Join Date
    Aug 2006
    Location
    St. Louis, Missouri
    Posts
    323

    Re: Best loup for ground glass focusing?

    A couple of things not mentioned here.
    1. The type of ground glass and whether or not you use a fresnel lens affects your ability to use stronger loupes. At some point you see the grain in the GG or the lines in the Fresnel rather than the detail in the image.
    2. Another consideration is whether you need diopter adjustment or not.

    Jerome

  9. #9

    Join Date
    Dec 1997
    Location
    Baraboo, Wisconsin
    Posts
    7,695

    Re: Best loup for ground glass focusing?

    I greatly prefer the loupes with a square rather than a round base. The square base is much easier to use along the edges and in the corners (if they're not cut out) than the round loupes and it's the corners and edges that you'll often want to examine most closely. There aren't too many square-based loupes made, I've collected three over the years, all of which are Peak loupes. One is 8x and the other two are 4x. I prefer the 4x. I also own a Toyo loupe which stays home because it has a round base but otherwise it's an excellent loupe. I think it's something like 6x but I'm not sure, it's been a long time since I've used it.
    Brian Ellis
    Before you criticize someone, walk a mile in their shoes. That way when you do criticize them you'll be
    a mile away and you'll have their shoes.

  10. #10
    Whatever David A. Goldfarb's Avatar
    Join Date
    Mar 2000
    Location
    Honolulu, Hawai'i
    Posts
    4,658

    Re: Best loup for ground glass focusing?

    You probably want an opaque base. The opaque base is for groundglass viewing and for transparencies on a light table. A clear or translucent base is for prints and contact sheets.

    If you have a fresnel screen, usually something around 4x is best. If you have a plain screen with a fine surface you might want something more powerful. The modern Schneider and Rodenstock aspheric loupes have very low barrel/pincushion distortion, making them comfortable to use for long periods of time.

    If you are using a folding viewing hood, you'll probably want a longer loupe like the Toyo 3.6x or the longer Wista or Horseman loupes. With a darkcloth, the length isn't so important.

    Silvestri makes a tilting loupe for getting into the corners of the groundglass with a wide lens.

    Another important thing when focusing is to be sure to spend enough time under the darkcloth in low light conditions or when using a slower lens to allow your eyes to adjust to the brightness of the groundglass.

Similar Threads

  1. Focusing Screens
    By cblurton in forum Cameras & Camera Accessories
    Replies: 18
    Last Post: 31-Aug-2011, 07:15
  2. Ground Glass Focusing - Linhof TK23
    By Greg Liscio in forum Cameras & Camera Accessories
    Replies: 2
    Last Post: 10-Nov-2006, 09:05
  3. Ground glass focusing plane
    By Louis Jensen in forum Cameras & Camera Accessories
    Replies: 5
    Last Post: 26-Feb-2004, 09:45
  4. focusing loupe for ground glass
    By dileep prakash in forum Cameras & Camera Accessories
    Replies: 7
    Last Post: 5-Jan-2004, 05:39
  5. Ground glass focusing with fresnal screens
    By John Dorio in forum Style & Technique
    Replies: 8
    Last Post: 23-Jan-2000, 17:45

Bookmarks

Posting Permissions

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