Another grab. This time a 35mm sized grab that should show infinity focus. Proportions look great.
scanned at 720dpi and saved as 720X1080.
sharpness. This lens is very sharp.
A couple more grabs from yesterday's neg. Baxter Sheriff was left over from a movie set. This is Goldfield, NV.
and a 100% crop. Need to understand how to make this crisp.
I understand that the lens is smearing because it's in the wrong position for the image and the speed to come to a perfect merge, I just don't know how to fix it.
Here are the numbers from the Gears.exe program for this lens.
Kia Ora Cirkut Gears - Fri Apr 04 23:20:23 2014
v2.0 10 November 2000
Original BASIC program by Bob Lang / Al Rosenbaum
Translated to C++ by Bruce Christie <email@example.com>
Subject distance measured from: film plane
Actual focal length of lens: 8.75 inches
Large gear radius: 4.5 inches
Diameter of film drum: 3.04 inches
Center of small gear to lens axis: 2.17 inches
Center of small gear to film plane: 1.69 inches
Slit width: 0.344 inches
Gear pitch: 32
GEAR # SUBJECT LENS PIVOT TO f/ IMAGE
DISTANCE EXTENSION SUBJECT MULTI- MAGNIF-
(FEET) (INCHES) DISTANCE PLIER ICATION
51 -62.054 -0.100 -747.798 0.99 -0.01
50 1228.422 0.005 14737.932 1.00 0.00
49 58.018 0.113 693.108 1.01 0.01
Another thought about sharpness issues
since you mentioned that your #6 is a composite of several cameras, have you checked the film plane in the magazine to see if it matches the ground glass focus? I have worked on cirkut cameras that were off by over 1/8 inch.
Mostly this is a problem with number 10 cameras since the rear bellows is separate from the camera body and can be shimmed to match the film plane.
It might be a bear if the #6 is out of wack that way as you are putting the magazine flush to the back of the camera and twisting it in to place. I have two #8's that were modified by a previous owner so they clip on like a number 10 so the distance could be adjusted but it did change the originality of the machine.
Last edited by panoramic; 04-07-2014 at 07:07 PM. Click to view previous post history.
Originally Posted by panoramic
Yes, I did check that and it seemed OK. Yesterday I made a series of 6 7" images of some houses up the hill behind me. A good infinity situation. I taped a rule on the bed and changed focus each time by 1 mm. 3mm back from where I had a good visual infinity was the best, but that was on the far edge of the test, so maybe I need to do it over and go even further.
Tonight I made a 42" 280 degree image up in town and the film was fogged.
Safe to say I'm not having much fun with this so far. Need a win.