Chinese wide angle bellows issues

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Ardpatrick

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I went looking for a used Canham DLC 4x5 wide angle bellows on the auction site, and didn't find one. But I found someone in China selling new leather W.A. bellows for specific L.F. cameras, including the DLC. It was about 30% of the price of a new bellows from Canham, and had good reviews. So I bought it. It finally arrived last week, and I got to test it on the camera. It doesn't fit.

The leather bellows is impressive, and real leather. The 'frames' (?) that mount into the rear and front vertical standards are made from some sort of laminate that contains sheet metal, but encased in something that has a carbon fibre weave pattern. Needless to say it's all thin - less than 2mm. Not exactly machined aircraft aluminium but functional. The rear frame sits into the recess of the Canham rear standard perfectly well, but the front frame doesn't fit the recess of the front standard. The frame is 115mm x 115mm. The recess of the camera front standard is taller, but its only 114.5mm wide.

I can probably return the item to China. It would take time for a refund(!). I would then have to forego movements on wide lenses, or resort to the Canham version, which I like in principle, but it's an expensive accessory specific to a lightly used piece of kit. I should clarify that I'm looking to use the camera with a 6x9 holder, and hence with 65mm focal lengths. The standard bellows will focus a 65mm lens to infinity, but with no movements.

Alternatively I could try to shave 1mm off the side of the front frame using a sander or metal file. I'm wondering about the responses of the material to abrasion. Photos pasted below (with help from Koraks!). Any wise thoughts?
 
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koraks

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Photos linked below (as I can't seem to insert them).

Just copy-paste

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And yes, I'd just grind that down until it fits. It's like what, half a millimeter on either side? Shouldn't be too difficult.
 
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Ardpatrick

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ags2mikon

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I would take the frame off and using fine 400 grit wet and dry paper taped to a glass plate, and wet sand it down to 113.8mm evenly on both sides. Or all 4 sides in need be. But your mileage may vary as they say. Sending it back to china will take time and may be costly, at least it is from here. (USA). Chinese leather work is very nice, or at least what I have seen. I have bought 2 replacement bellows from China for my horseman cameras and have been very happy with them. They don't leak light.
 

Light Capture

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That seems to be real carbon fiber.

Watch out for tiny fibers strong enough to easily pierce skin.

Probably the easiest to remove the frames if they're not glued or glued hard to the bellows.

Wet sanding and gloves highly recommended. No blowing with air. Avoid using vacuum unless you have a HEPA certified one (It's not the same as the big box store HEPA sticker or claim).
If those fibers get loose, they can be quite nasty and a serious health hazard. Both material and fibers are most likely completely inert but the nature of it's dust and fibers can be quite unhealthy.
It should not reach lungs in any circumstances.
 
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Ardpatrick

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Thanks all. I’ll sand it down using wet & dry paper on glass - wearing goggles & a mask. I’m not sure if I can detach the frame from the bellows - but if not I will need to protect the leather etc. I may varnish or tape the sanded edges afterwards to seal them.
 

_T_

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It’s plastic you don’t need to seal it. Also you’re going to add material back on trying to seal it
 
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