Jas. W. Queen & Co. Rapid Rectilinear 13 3/4" focus, but can't focus!

jonw · Apr 14, 2006

I just received this barrel lens...Jas. W. Queen & Company 13 3/4" lens which is suppose to be a full plate lens, but I can't get it to focus on my Deardorff V8 gg. The front lens is convex ( while the rear lens cell is convex in the opposite direction ) , i.e., facing out toward the gg's direction. Does anyone know what the glass configuration should be for this lens? I am thinking a piece of glass lens may be missing, but I am not certain. Any insight and assistance would be appreciated. Thanks. Jon

rrankin · Apr 14, 2006

Have you tried reversing the front and rear cells? (or just putting the lens into the lensboard as what you think is backwards).

Richard

jonw · Apr 14, 2006

rrankin said:
Have you tried reversing the front and rear cells? (or just putting the lens into the lensboard as what you think is backwards).

Richard

I have not tried reversing the lens cells, but the metal rims appear as if they were made to fit in their present configuration. The rear cell has ribbing similar to what one finds with the rear cell of a 5 1/2" Illex paragon or an 8x10 WA 7 1/4" Gundlach in a betax shutter, just to name a couple of lens I have which also have similar rear cell ribbing...for lack of a better descriptive term.

Jon

Jim Jones · Apr 14, 2006

jonw said:
. . . Does anyone know what the glass configuration should be for this lens? . . .

Rapid Rectilinear

jonw · Apr 14, 2006

Rapid Rectilinear
Attached Thumbnails

That is the configuration of the Queen cells. Thanks Jim.

Now, does anyone have suggestions as to why I am unable to focus it on the gg?

I did try each cell individually and neither would focus a viewable picture.

Jon

removed account4 · Apr 15, 2006

hi jon

i have seen cells put in barrels they shouldn't belong, and because the spacing was not right, nothing focused. have you tried to hold the each cell near a wall, or white piece of paper with a window or lightbulb nearby to focus it off-camera?

good luck!
john

jonw · Apr 15, 2006

jnanian said:
hi jon

i have seen cells put in barrels they shouldn't belong, and because the spacing was not right, nothing focused. have you tried to hold the each cell near a wall, or white piece of paper with a window or lightbulb nearby to focus it off-camera?

good luck!
john

Excellent suggestion John....But much to my dismay, this Queen barrel lens does not produce an image. I tried this method with other lens with success, but could not accomplish any image with this Queen barrel. I am guessing either these are the wrong cells or there is a missing lens. I will keep trying different distances with each cell to see if anything will work and I will also try the seller to see if he will give me a refund for this apparent paper weight.
Jon

jimgalli · Apr 15, 2006

I usually take the GG off the camera, stand in a dark room, and hold the lens out in front of the GG looking at a bright lightbulb and moving back and forth to see if I find a focus. You don't even need a camera.

Dave Wooten · Apr 16, 2006

or in a dark room turn on one light bulb....and place the lens against the wall opposite the light, moving it slowly away from the wall....focusing the image on the wall

Ole · Apr 16, 2006

I use a long corridor with a window in one end and a cupboard door in the other. I focus the image of the window on the door, lens simply hand-held. If I then mark of the width of the image, I can read the focal length directly off my "pre-calibrated" previous scratches.

If the lens is a Rapid Rectilinear, there are only two lens groups of two elements each. Either one will give a viewable image, with a focal length of a bit more than twice that of the combined lens. If neither (or either) group won't give an image, it's not a RR.

Many Anastigmats consist of one group that will focus and one which won't. If neither will, you might have two front groups in one barrel...

jonw · Apr 16, 2006

Ole said:
I use a long corridor with a window in one end and a cupboard door in the other. I focus the image of the window on the door, lens simply hand-held. If I then mark of the width of the image, I can read the focal length directly off my "pre-calibrated" previous scratches.

If the lens is a Rapid Rectilinear, there are only two lens groups of two elements each. Either one will give a viewable image, with a focal length of a bit more than twice that of the combined lens. If neither (or either) group won't give an image, it's not a RR.

Many Anastigmats consist of one group that will focus and one which won't. If neither will, you might have two front groups in one barrel...

Ole, I think this Queen Lens might have two mismatched cells. I have tried the approach of obtaining a picture on the white wall and using either cell by themself or combined, no picture appears and the lens barrel is almost flush on the wall. I believe it is going to be a paperweight if I can't get a refund....maybe the flange will work on another lens which comes my way.
Thanks one and all for your assistance.

Jon

jonw · Apr 16, 2006

Well here is the update....the lens is being returned for a full refund. I realize there is not much money involved, but I wanted to posted this because the Ebay Seller, IMO, is honorable and has the strong character of standing behind his items, even though he is not required to provide a refund.

I highly recommend this Ebay seller as a result. See: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7605767257&rd=1&sspagename=STRK:MEWN:IT&rd=1

Best wishes and Happy Easter, Jon

Jim Jones · Apr 16, 2006

I finally found an RR in all of my junk. If my tests and calculations are correct, each cell of yours should focus at about 25 inches

Jas. W. Queen & Co. Rapid Rectilinear 13 3/4" focus, but can't focus!

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Jas. W. Queen & Co. Rapid Rectilinear 13 3/4" focus, but can't focus!

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