KiboOst wrote:
Maybe they have read this thread now and see how they much improve their adapter ?
I actually had included a link to this thread in my email, so they know what the issue exactly is.
Regarding the rotational play, it is because the locking pin in the adapter\'s mount, the one that locks into the hole that is on the Canon EF lens, is too small ( tolerances I guess), and \"wobbles\" in the lens\' locking hole. I don\'t see any other \"real\" solution than adapting a new pin with a larger diameter. It should be fairly easy to do but I\'m not sure it is worth the risk. Obviously this rotational play means the lens is not fully pressed against the adapter, so there has to be some kind of play on the other two axes. To what extent it has an influence on perfect alignment, I\'m not sure, but I suspect it is not much, especially with wider/ultra wide lenses that have by nature a very large DOF.
As mentioned above another solution is to add thickness to the mount, to press the adapter/lens together with more pressure, which in the end will have an influence on the rotational play, as it will make the lens more difficult to turn (but it is not really solving the problem, but minimizing it). But to me the real solution would be to have a larger locking pin, the exact size of the hole on the EF lens.
If we continue we will end up re-designing the adapter completely
KiboOst wrote:
Maybe they have read this thread now and see how they much improve their adapter ?
I actually had included a link to this thread in my email, so they know what the issue exactly is.
Regarding the rotational play, it is because the locking pin in the adapter\'s mount, the one that locks into the hole that is on the Canon EF lens, is too small ( tolerances I guess), and \"wobbles\" in the lens\' locking hole. I don\'t see any other \"real\" solution than adapting a new pin with a larger diameter. It should be fairly easy to do but I\'m not sure it is worth the risk. Obviously this rotational play means the lens is not fully pressed against the adapter, so there as to be some kind of play on the other two axes. To what extent it has an influence on perfect alignment, I\'m not sure, but I suspect it is not much, especially with wider/ultra wide lenses that have by nature a very large DOF.
As mentioned above another solution is to add thickness to the mount, to press the adapter/lens together with more pressure, which in the end will have an influence on the rotational play, as it will make the lens more difficult to turn (but it is not really solving the problem, but minimizing it). But to me the real solution would be to have a larger locking pin, the exact size of the hole on the EF lens.
If we continue we will end up re-designing the adapter completely
KiboOst wrote:
Maybe they have read this thread now and see how they much improve their adapter ?
I actually had included a link to this thread in my email, so they know what the issue exactly is.
Regarding the rotational play, it is because the locking pin in the adapter\'s mount, the one that locks into the hole that is on the Canon EF lens, is too small ( tolerances I guess), and \"wobbles\" in the lens\' locking hole. I don\'t see any other \"real\" solution than adapting a new pin with a larger diameter. It should be fairly easy to do but I\'m not sure the risk is really worth it. Obviously this rotational play means the lens is not fully pressed against the adapter, so there as to be some kind of play on the other two axes. To what extent it has an influence on perfect alignment, I\'m not sure, but I suspect it is not much, especially with wider/ultra wide lenses that have by nature a very large DOF.
As mentioned above another solution is to add thickness to the mount, to press the adapter/lens together with more pressure, which in the end will have an influence on the rotational play, as it will make the lens more difficult to turn (but it is not really solving the problem, but minimizing it). But to me the real solution would be to have a larger locking pin, the exact size of the hole on the EF lens.
If we continue we will end up re-designing the adapter completely
Jan 10, 2014 at 03:45 AM
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