See Part One here. https://photography-on-the.net …showthread.php?p=17540362
The Photodiox WonderPana filter system also accommodates slide-in filters--BIG slide-in filters--thru the use of a pair of adapters.
These screw onto the rear of the adapter ring.
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...and accommodate two filters, either two slide-ins or one slide-in and one screw-in.
Here's my three-stop Grand-ND.
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This system is a bit expensive but effective.
BTW I'm now using my two TS-Es--the 17mm and the 24mm Mk. II--on my Samsung NX1 body with a dumb adapter. One might argue that the NX1's crop sensor doesn't need such large filters, but I'm not worrying about that, I'm just going to use the system I have.








