I have an Ebony SV45U, which came with the standard bellows. I plan to buy an 80 mm soon, and another lens in the 58-65mm range sometime in the future. I current ly use a 110 and 180, and foresee a lens in the 300mm range in the more distant future.
The standard bellows will not work with the 80mm lens. Even with my 110, the sta ndard bellows limits the range of movements.
Ebony offers a bag bellows, and a "universal" bellows. The universal bellows is mostly pleated, but becomes bag-like for a couple of inches near the front stand ard.
The advantage of the universal bellows is that I can avoid carrying an additiona l piece, and avoid changing the bellows. On the other hand, the bag bellows prob ably works better with wide lenses, and changing bellows on the Ebony is a fairl y simple process.
If anyone has experience with either of the Ebony bag or universal bellows, and would like to make comments or recommendations, I would surely appreciate readin g your input.