Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,200   Posts: 1,531,523   Online: 1005
      
Page 2 of 2 FirstFirst 12
Results 11 to 18 of 18
  1. #11
    outwest's Avatar
    Join Date
    Aug 2005
    Shooter
    Multi Format
    Posts
    317
    Images
    3
    Hey Dan Fromm,
    I'm sure you can answer the OP's description question. Double Gauss covers a lot of territory but can you call 2 air separated elements a group? Wouldn't it be 4 elements in 4 groups? Wolly wasn't a slouch and I'm guessing it will perform like an Angulon but should we tell him about Perigraphes?

  2. #12
    Newt_on_Swings's Avatar
    Join Date
    Mar 2011
    Location
    NYC
    Shooter
    Multi Format
    Posts
    1,799
    I've never heard of a perigraph before... Do tell! Also what should such a lens layout be called correctly?

  3. #13

    Join Date
    Mar 2005
    Shooter
    Multi Format
    Posts
    3,354
    Outwest, I believe, could be mistaken, that in the optical engineer dialect of English a lens element is a single piece of glass. A group is one or more elements (if more than one, all cemented into one piece with no internal air spaces) with air on both sides. Lenses are sometimes mounted up in barrel or in shutter with one or more groups on one (or both) sides of a diaphragm. When the groups on one side of the diaphragm are mounted so that they can be removed as a unit -- this isn't the case for all lenses, when my friend Charlie Barringer unscrewed what he thought was a 55/5.6 Lamegon's rear cell from its shutter, the groups fell out -- the unit is called a cell.

    A four element double Gauss type's lenses are laid out this way: ((|)) where ( is a single element and | is the diaphragm.

    The OP doesn't need to know about Perigraphes. Short story, Perigraphe is a Berthiot trade name that was applied to two quite different dagor type (six elements in two groups) lenses. f/6.8, not particularly wide angle (late ones, 65 degrees), and f/14, extreme wide angle (late ones, 100 degrees). I don't recall seeing either in shutter, but the f/6.8ers can be adapted. The gap between f/14ers' cells, especially the shorter focal lengths, is said to be too narrow for them to be put in shutter. Could be, but the cells' mounting -- they're in quite wide symmetrical dished plates -- is another obstacle to putting them in shutter.

  4. #14
    Newt_on_Swings's Avatar
    Join Date
    Mar 2011
    Location
    NYC
    Shooter
    Multi Format
    Posts
    1,799
    Well the lens arrived today from keh, and I got to check it out before. It's very clean looking besides a bit of dust which I cleaned out from inside, but slow speeds are off, 1 sec is closer to 2, and 1/2 is about 1. I wished for a pc flash sync port, but unfortunately its a bi post which I'll have to get an adapter for. The whole setup does close up very nicely into my wista sp body! And the cells are just tiny and don't really protrude out or into the body much at all. I won't get a chance to shoot with it until the weekend though, hopefully it performs!

  5. #15
    Hatchetman's Avatar
    Join Date
    May 2011
    Location
    Chicago, IL
    Shooter
    Multi Format
    Posts
    585
    Images
    6
    Post some results when you get them. I'd be interested to see how it performs.

  6. #16
    Newt_on_Swings's Avatar
    Join Date
    Mar 2011
    Location
    NYC
    Shooter
    Multi Format
    Posts
    1,799
    Sure will do, I got some azo paper and a mini Yankee contact printer I refurbished with some new foam which I only briefly got to do a few prints with this Tuesday. I hope to get some halfway decent shots as I'm still getting comfortable with the camera this weekend if weather permits.

  7. #17
    Newt_on_Swings's Avatar
    Join Date
    Mar 2011
    Location
    NYC
    Shooter
    Multi Format
    Posts
    1,799
    I had a little bit of time last weekend to take a few quick snaps in the back yard developed them last night. The 1st with the tree was Foma 400 @ 250 in D76 1:1 @ 75C for 7min. The 2nd is with Arista Ortho Litho 2 in Dektol 1:4 which had 15g/L of KBr in it from a previous printing session, I developed by inspection so I didnt time it. Both were scanned with my HP G4050 today as they were still drying last night when I was printing in the darkroom.

    Both were shot without filters on my Wista SP at f16 and f22, the lens is very sharp at these apertures at both the center and the corners. I tried some close up shots but I totally forgot about bellows factor, so they came out very very under exposed.

    More practice is in order with this lens, especially with testing larger movements (as the regular bellows limits it a little for large movements as it sits close, a bag bellows may work better) but I think its a keeper.
    Attached Thumbnails Attached Thumbnails wollensak 108 Scan-140225-0001.jpg   wollensak 108 Scan-140225-0003.jpg  

  8. #18

    Join Date
    Nov 2013
    Location
    Windcrest, Texas
    Shooter
    Medium Format
    Posts
    28
    I'm know I am late to the party.
    Been lurking a quite a while, but thought I would chime in for future reference when peeps read this. First post here on APUG.

    I too had an (uncoated) 159 9.5 many years ago. I later sent it out and had it coated - a lab somewhere in the N.E. whose name I cannot recall. It was already a reasonably good lens, but the coating made a notable improvement in contrast / color saturation. Pre-coating, it was still nice - or I would not have spent the coin to have it coated to see if I could make a good lens better.

    While it was no Nikkor SW or Super Angulon, it was a darn fine performer, and at 16 and down seemed very fine to my eye. Mostly used it with Ektachrome 50 64 and 100. I was a commercial photographer back in the late 70's through the mid 90's - and this was my go to for wide on 8X10 and also provided decent coverage on 5x7 when I shot that. If you need a wide, and cant find a 165 S.A or angulon, this one will certainly do a decent job.

    I used a 90 a few times and it was certainly decent enough, but the angulons and SA's were much more common and since I used 4X5 far more often for very critical work (architecture and interiors) I had a Super Angulon which has much better in coverage. I have used so many lenses over the years 25+ years ago. I bought, sold, borrowed and traded more than I can remember, and have good memories of a few, bad experiences with a few, and a lot of lenses that were for the most part good, mostly decent performers. A few were spectacular, and there is a lot of good glass out there.

    Occasionally you get a lens that just sings for you. If you do, keep it, or you will regret it. It matters not what the reputation is, what name is on it, or what kind of condition it is in. Just shoot with it and never let it go, except to the shop for CLA.

    My favorite thing about these old gals is they are so SMALL compared to the Huge modern designs. If you are using a field camera a 90 - 120 angulon, and a 203 ektar makes for a super compact setup that will give almost everything you need for 4x5. While you may get one thats a dog, don't judge an old lens based on lack of a prestige name.

Page 2 of 2 FirstFirst 12


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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