I know I have a reputation for "big (and expensive) is beautiful" so I thought I'd show off an instrument I use regularly.
Russian 4x20 porro prism binoculars, bought new in 1975 for Â£4.95. 35 years of use have not caused any issues, the collimation is still spot on. Star images are sharp & symmetrical, except near the edge of the field. The Russians were desperate for foreign exchange at the time, but honestly these would have been a bargain at 10x the price.
Does not have a tripod mounting bush, but at 4x doesn't really need one.
This tiny instrument has a wide, flat field and is ideal for visual estimates of variable stars between magnitudes 4 & 6. Much, much better than the cheap, poor quality Chinese 8x21 & 10x25 roof prism instruments which are all too common these days.