Used: Rolleiflex 90 degree "t" style viewfinder for 6000 series cameras
Condition: Cosmetically excellent, but some minor dust inside, some hardening of rubber eye cup, and some faint coating rub marks (not scratches) on big lens that meets the focusing screen - these may or may not be apparent during use. This finder is totally useable and the telescoping feature and adjustable diopter are working perfectly. These are rare and hard to find.
The T-finder is a 90 degree viewfinder which has an telescoping front eyepiece that can be pulled out to increase the magnification for easier focusing. It also has an adjustable diopter on the eyepiece which is quite convenient. They are also lightweight since an lens and mirror is employed as opposed to a big blog of prism glass.