Recently found on eBay, a University Optics 11x80mm finder. I had one of these decades ago and sold it on a telescope, regretted it ever since, so I had to grab this one when I saw it.
Of course it's only 11x with the proper eyepiece, which if memory serves is 25mm. This one came with no diagonal or eyepiece, but I have boxes full of spares.
My TO type-2 steel-on-glass filter fit snugly on the cell, so I plopped-in a UO 12mm Ortho and took a peek at the sun today. One big spot group and a few smaller ones.
Because this objective is so fast, the focus sweet spot is very narrow. There is no depth of field and you have to just nail the focus dead-on. But it gave a decent solar image in Sunkist orange with the TO, good enough for a quick look in white light.
These finders came with a tripod block on bottom, so they could be used as stand-alone spotting scopes on your camera tripod. I put mine on my Manon 600, which effectively turns into a true equatorial mount because you can pivot the center pillar over to match your latitude. Then objects can be followed by movement of the pan head only, in an east-to-west direction.
A nice large-aperture, wide-field finder. It has about the same amount of image distortion as you'd find in a budget 80mm binocular (probably uses a binocular objective). Similar amount of field curvature and CA. But not bad for it's price point when it was available. The 1.25" R&P is a nice convenience. I forgot to check it for vignetting when I had it out today, but I suspect there would be some with a long focal-length eyepiece.
Nice to have one back in my arsenal after all these years, and this one is in very good condition.