With the lens ring attached, is the focus ring on the lens movable? say, i want to manual focus
Yes. The focus ring does move freely. If you want to lock it down, you need to use tape of some sort to build up the thikness of the focus ring. I leave mine open since I use the lens for pictures other than panoramas.
R1 comes with various ring types - using the new Canon 8 -15 fisheye which ring clamp are you using ? Does new canon fisheye fit the Sigma 8mm Fisheye ring ?
Last edited by 360texas; 08-10-2011 at 08:29 AM.
Dave still at 360texas.com
Forum Moderator Pano2VR
I do not think so, cause the canon lens has two outstanding knobs on the lens plus each ring is specially made for a type of lens. Fixing to parts of it's body wheere it may be fixed to which is not moving or causing damage.
As often mentioned, Nick will make one as soon as he has the lens in his hands.
I you like to switch you have to find the point while tightening the lens ring where the lens itself is fixed, but focus ring is moveable. Mine is fixed when I can still move the focus ring manually. This does not work with autofocus. When I want to use autofocus, the lens ring turns on the lens as well.
Normally we use a fixed focus and tape the lens as well so that the focus ring does not move. Mine does not work in a set up that the lens ring is fixed to the lens and the autofocus does work. Autofocus only works when the lens ring is loose as well.
It's Sigma 8mm/f3.5 for Nikon.
The pros will advise you to use MF all the time. Set F-number to F8. Use live view to test the best focus distance from 0.5-1m on the scale. tape it or mark a line on the lens barrel that is not hidden by the lens ring. Only if your are making close up panos or using larger F-number do you need to change the focus distance. In any case, MF is preferred.
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The only thing I can imagine: you have to grind out the inner front part of the inner lens ring which comes on top of focus ring. You can not cut off the whole part because you will loose the reference point for the outer ring.
That way you would get the focus ring free to autofocus as well.
I have the Sigma 8mm f3.5 lens and the correct lens ring clamp for Nikon. Even though the picture shows the ring extending out onto the focus ring, mine does auto focus just fine. The ring does NOT clamp down onto the focus ring. Canon may be different. The only mod I made was to machine a window into the ring clamp so I could see the focus scale.
To sum it up:
1. Can the ring be made "thinner" without loosing grip to the lens in turn the camera body then to the R10?
2. I prefer to leave the ring on the lens all the time. Removing it, reattaching it only seem to be subjected to wear and tear.
3. Hope to be able to see where i am lining up my shots. Pro or not, i dont really care. I know what i need and at my last paid shoot for a hotel chain. I reverted to my nodal ninja 3. I just need to know what distance i am focusing at. At f/10, i want to know and i want to know all the time.
i hate to bring up names but other brands seem to be able to have a smaller/ thinner ring. At the expense of sturdiness? or over the weight of the camera used (no full body cams like the 1D series)?
You can mark the focus distances on other area of the lens, not covered by the lens .
Fanotec lens ring clamps are built with special attention to the safety of lens.
Features and Highlights
Plastic insert is placed between the outer metal ring and the lens. It is contoured to fit the lens and hence increase area of contact.
Large clamping area to reduce stress on the lens barrel, reducing the risk of damaging the lens.
Mounted close to the camera to reduce stress on the lens due to gravity of camera body
Rolling the camera/lens in any position including the popular 0, 60 and 90 degree positions
Index marks for every 90 degrees in the front and every 30 degrees at the back for easy alignment of roll of lens.
Permanently mounted to lens, making reproducible mounting possible, and much quicker to setup.
Compact and light weight
note: improper use of lens ring clamp may cause stress and damage to the lens. Manufacturer is not responsible for damage to the lens due to use of lens ring mount.
Last edited by nick fan; 10-29-2011 at 12:44 AM.
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