neil poulsen
2-Mar-2013, 23:46
I just finished this little project and thought that it would be worth documenting.
As you can see from the first photo, I've adapted a 4x5 Sinar bag bellows with binocular viewer to an Arca Swiss 4x5 camera.
What makes this work, is that the Arca adapter (2nd Photo, Part A. Arca Catalog #161015) is a perfect match in size to attach (with screws) to the frame of a Sinar bellows. I used a Sinar bag bellows (versus regular bellows) for flexibility. The Arca adapter attaches to the back of the Arca camera (its purpose), and the Sinar bellows with binocular viewer was attached with screws to the Arca adapter. (2nd Photo, Part B. The screws may be hard to see; they're shiny in the center photo.)
To attach the adapter to the bellows, I used 3/8" #4 screws shown in the 3rd photo. Centering the screws in the flange on the adapter centers them in the "trough" of the frame of the bellows. (Photo 2, Part C.) In fact, drilling the holes in the flange left some shards of metal that extended underneath. Serendipitously, these shards helped center the adapter onto the plastic frame of the bellows.
My process was to first drill the 8 holes in the top of the flange, adjacent to the rest of the Arca adapter. I used a 3/32nd inch drill bit. Next, I fitted the Arca adapter to the frame of the Sinar bellows using a couple of small C-clamps. (As I mentioned, the metal shards helped hold the adapter in place on the frame of the bellows. The shards fit perfectly in the trough of the frame seen in the 2nd photo, part C.) Once the adapter and bellows frame were clamped together, I extended the holes into the plastic of the frame. Drill until the bit is stopped by metal. No need to drill into or beyond the metal. As a final step, I expanded the holes in the metal Arca adapter to 7/64ths inch using that sized drill bit. (1/64th inch larger than 3/32nd inch.)
Once the holes were drilled, it was an easy matter to screw in the 8 screws.
Works great.
COSTS:
I happened to get the Arca adapter as part of a separate purchase, so I had that on hand. This adapter sells for $179 at B&H. I bought the Sinar bag bellows for about $50. I'm not sure how much the Sinar binocular attachment (4th photo) typically sells for. I'm thinking less than $100. Maybe still not cheap for the total project, but about $300 is less than one can expect to find the Arca Swiss equivalent for sale used. I was lucky to have the Arca adapter on hand.
SINAR REFLEX BINOCULAR VIEWER:
It was my intention to purchase a second Arca adapter and do the same with a Sinar reflex viewer that I had. After comparing the Arca adapter to the body of the Sinar reflex viewer, this appeared like it would have worked fine. As it turned out, I purchased an Arca reflex viewer on EBay, so I gave the Sinar reflex body to a friend.
As you can see from the first photo, I've adapted a 4x5 Sinar bag bellows with binocular viewer to an Arca Swiss 4x5 camera.
What makes this work, is that the Arca adapter (2nd Photo, Part A. Arca Catalog #161015) is a perfect match in size to attach (with screws) to the frame of a Sinar bellows. I used a Sinar bag bellows (versus regular bellows) for flexibility. The Arca adapter attaches to the back of the Arca camera (its purpose), and the Sinar bellows with binocular viewer was attached with screws to the Arca adapter. (2nd Photo, Part B. The screws may be hard to see; they're shiny in the center photo.)
To attach the adapter to the bellows, I used 3/8" #4 screws shown in the 3rd photo. Centering the screws in the flange on the adapter centers them in the "trough" of the frame of the bellows. (Photo 2, Part C.) In fact, drilling the holes in the flange left some shards of metal that extended underneath. Serendipitously, these shards helped center the adapter onto the plastic frame of the bellows.
My process was to first drill the 8 holes in the top of the flange, adjacent to the rest of the Arca adapter. I used a 3/32nd inch drill bit. Next, I fitted the Arca adapter to the frame of the Sinar bellows using a couple of small C-clamps. (As I mentioned, the metal shards helped hold the adapter in place on the frame of the bellows. The shards fit perfectly in the trough of the frame seen in the 2nd photo, part C.) Once the adapter and bellows frame were clamped together, I extended the holes into the plastic of the frame. Drill until the bit is stopped by metal. No need to drill into or beyond the metal. As a final step, I expanded the holes in the metal Arca adapter to 7/64ths inch using that sized drill bit. (1/64th inch larger than 3/32nd inch.)
Once the holes were drilled, it was an easy matter to screw in the 8 screws.
Works great.
COSTS:
I happened to get the Arca adapter as part of a separate purchase, so I had that on hand. This adapter sells for $179 at B&H. I bought the Sinar bag bellows for about $50. I'm not sure how much the Sinar binocular attachment (4th photo) typically sells for. I'm thinking less than $100. Maybe still not cheap for the total project, but about $300 is less than one can expect to find the Arca Swiss equivalent for sale used. I was lucky to have the Arca adapter on hand.
SINAR REFLEX BINOCULAR VIEWER:
It was my intention to purchase a second Arca adapter and do the same with a Sinar reflex viewer that I had. After comparing the Arca adapter to the body of the Sinar reflex viewer, this appeared like it would have worked fine. As it turned out, I purchased an Arca reflex viewer on EBay, so I gave the Sinar reflex body to a friend.