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vic valis
Joined: 21 Nov 2001
Posts: 247
Location: San Francisco
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 Posted: Mon Apr 25, 2005 8:05 pm Post subject: |
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...okay, came with my Graflex RB. Big and heavy and impressive looking. Works (I think) and pretty clean. Rear elements stick back far enough into the camera to pbstruct the mittor, but a previous owner build up the "B" board to accomodate the lens, and I just used that board to build a "C" to "B" adapter. Adds a few inches to the lens-to-filmplane distance, but not a problem so far. Can anyone tell me about the lens? Any specific uses? Lots of listings for it ona google search, but I cannot find much specific info. Anyone can tell me about it, I'd greatly appreciate it.
jeff
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Les
Joined: 09 May 2001
Posts: 2682
Location: Detroit, MI
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| Posted: Tue Apr 26, 2005 12:29 am Post subject: |
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A series II Colinear is a convertable lens, similar to a Protar, although the glass shapes are different. I"m guessing the lens can't be used on the camera with the front element off and it may not even have the second scale.
I have an RB auto with a Protar in the same situation.
If the lens isn't suffering from cement failure it should be a joy to use. The good side is that in only has 4 air to glass surfaces, so flare shouldn't be a problem, the bad news is the chance of getting all 8 pieces of glass in their exact position is extrodinarily difficult, so good ones are great, but is suspect dogs exist.
Les
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Dan Fromm
Joined: 14 May 2001
Posts: 2144
Location: New Jersey
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| Posted: Tue Apr 26, 2005 12:31 am Post subject: |
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On 2005-04-25 13:05, vic valis wrote:
...okay, came with my Graflex RB. Big and heavy and impressive looking. Works (I think) and pretty clean. Rear elements stick back far enough into the camera to pbstruct the mittor, but a previous owner build up the "B" board to accomodate the lens, and I just used that board to build a "C" to "B" adapter. Adds a few inches to the lens-to-filmplane distance, but not a problem so far. Can anyone tell me about the lens? Any specific uses? Lots of listings for it ona google search, but I cannot find much specific info. Anyone can tell me about it, I'd greatly appreciate it.
jeff
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The Vade Mecum says:
"Kollinear Series 11 This seems to be the most common from experience, and today are usually available if you look. They were general purpose lenses with an extra rapid classification but also highly corrected and
with the advantage of being convertible to a lens of twice the focus.Thus it is useful for landscapes, long focus work, interiors and copying. Unusually, no angle of cover is given in the USA list but two formats for each focus are listed. The Layout is Voi012 and in 1914 it was made as: f5.4 2.375in for 1.5x1.5in; 2.75in for 1.75x2.5in; 3.5in for 3.25x3.25in; 4.75in for 3.25x4.25in; 5.5in for 4.25x4.75in; 6.0in for 4x5in; 7.0in for 4.5x6.5in; 8in for 6.5x8.5in; and also 9.0in, 12, 13.5, 15, 17.5, 20cm;
f6.3, 25cm for 5x8in; 31cm for 6.5x8.5in, 37cm for 8x10in, 44cm for 12x15in , 52cm, 60cm for 14x17in. It covers about 80° in all sizes. The above formats are at full aperture, and are increased at medium stops. Thus the 6in then covers not 5x4in but even 5x7in. All sizes from No2 to No6 ie 4.75in to 12in inclusive were avaialable as cells to fit to shutters. This may not have applied in other years but the lenses seen fit the scheme. It is normally classed as a fine
lens but the f5.4 seen has not been a very useful lens in experience, but this example may have been poor. The f6.8 and f6.3 are much sharper and less flarey. It was also covered by DRP 88,505. [Afalter seems to have
the same series of apertures and foci in Germany in 1910, but notes it covers 60°. This may be at full aperture.]"
Understand that the VM isn't always correct or complete. |
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glennfromwy
Joined: 29 Nov 2001
Posts: 903
Location: S.W. Wyoming
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| Posted: Tue Apr 26, 2005 3:23 am Post subject: |
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I don't know the technical stuff but I saw a photograph somewhere recently that was made with one. Stunning!
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Glenn
"Wyoming - Where everybody is somebody else's weirdo" |
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RichS
Joined: 18 Oct 2001
Posts: 1468
Location: South of Rochester, NY
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| Posted: Tue Apr 26, 2005 4:12 am Post subject: |
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Not that it helps, but do you have any other info on the lens. As Dan showed, it comes in f/5.4 from 60mm through 203mm with the 4 3/4" (120mm) being the first to cover 4x5. Then in f/6.3 from 165mm through 600mm. The coverage starts at 5x7...
My book doesn't offer any other info, like element types...
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Les
Joined: 09 May 2001
Posts: 2682
Location: Detroit, MI
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| Posted: Tue Apr 26, 2005 1:05 pm Post subject: |
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60° field of view.
6 elements in two groups, symmetrical about the stop
from outside in, they are
double convex, positive miniscus, negative (double concave).
A dagor is double convex, then the negative, then the miniscus
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vic valis
Joined: 21 Nov 2001
Posts: 247
Location: San Francisco
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| Posted: Tue Apr 26, 2005 7:47 pm Post subject: |
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Thanks folks, I'm still in the process of remounting the lens in a C board, so I haven't had the chance to use it yet. Before I remeoved it from the old B board, it seemed to jave a nice clear image in the viewfinder.
jeff
_________________
That money talks,
I'll not deny.
I heard it once;
It said "good-bye." |
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