View Full Version : Camera lens combinations that will need the QRC 40B Clamp for use on M1 upper rail 170mm MFR-170
08-11-2011, 09:35 AM
Following my tests about settings concerning M1, you will need this clamp for the combination because you see the rail in the picture:
Nikon D3: shaved Nikkor 10.5,
Nikon D3 Nikkor 16mm is ok on MFR-170
Tomorrow I will check these lenses with other Nikon Bodies.
08-14-2011, 11:45 AM
Hi, my next test with fisheye lenses on upper rail MFR170::biggrin:
Following my tests about settings concerning M1, you will need clamp QRC 40B in combination with QRC 40A on upper rail because you see the rail in the picture:
D300s, D7000, D200, D90 for the use with Sigma 8mm/f3.5 and Samyang 8mm/f3.5
No need for Nikkor 10.5/f2.8 and Nikkor 16mm/f2.8
D5100 even needs QRC 40B for Nikkor 10.5/f2.8 besides for the other fisheye lenses.
QRC 40A and QRC 40B are fixed together so that you can glide forward on the upper rail. I'll send the solutions and settings when I got a QRC 40B in my hands.
08-14-2011, 12:04 PM
Do you see the rail in the final stitch?
08-14-2011, 12:57 PM
Actually to say I did not try this till now. Depending on the lens camera combination your see more or less of the rail.
I will test this the next days.
Ups, don't know why the pics are turned around being uploaded, it's late and I leave it like this right now. Samyang looks similar to Sigma.
08-14-2011, 06:15 PM
Wow. The upper rail does stick out a lot in some of the combinations. I would be interested to see the final stitch. It may be an issue with some of the combinations.
08-24-2011, 07:10 AM
In the meantime I stitched some of the worst showing M1 upper rail lenses like D3 shaved 10.5 and D7000 Sigma8mm/f3.5.
Your question was a good one. It is always worth the time to listen to your comments. I personally have been surprised of the stitching result:
The upper rail does not show in the stitch, I used PTGuiPro. I had contact about this with Nick as well, and it seems that the rail does not show when it shows "inside the overlap area". Might be in cases we shoot "extreme", 3 shots instead of 4 with a lens then can do both and overlap decreases below 20% for example.
I will stay on line with this project. I do not believe this might be a special software solution, 25% overlap should be the same in all stitching software?
@John, what do you think? Do we have to test other software?
So right now, I will take my time to test and stitch the Nikon Branch with bodies and lenses I have available and let you see this later on. Will take some time.
08-24-2011, 09:10 AM
Heinz, My own solution to the long rail problem is to use a QRC-2 adapter that slides along the upper rail in the manner of an NN5. I have two screws fitted into holes in the plate that protrude into the central slot of the upper rail to provide an anti twist feature:
I don't like anything intruding unnecessarily into the image area. Some software will automatically cope with anything that does, though it is always safer to use a mask to be sure. The reduction of overlap it causes is in the important central horizontal band where one would prefer to have maximum overlap to maximize one's options for editing in busy scenes with moving features. With a full circle fisheye , it is inevitable that parts of the upper rotator will intrude on the right hand side, as the entrance pupil is necessarily aligned with the centre of the rotator.
08-24-2011, 09:29 AM
John, thx a lot for sharing your solution and your overall opinion concerning this question.
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