Antares 12.5x80mm Right Angle Correct-Image Finder
If you have a big scope, and need a big finder to hunt down faint objects, an Antares 12x80mm finder is probably for you. Standard features include multicoated objective lens, eyepiece with rubber eyeshield, 52 degree apparent field, internal baffling, dust caps and focusable wire reticle.
Note that focusing this finder is achieved either by (1) sliding the diagonal out of the body if required (accomplished via an allen set-screw on the underside of the tube) and/or (2) sliding the reticle eyepiece up or down within the diagonal. With this mechanism, you can change eyepieces to use this as an 80mm second/travel scope, but you may not reach focus with all of them due to limited focus travel.
Available in a choice of three colors to match your telescope. 80mm finder bracket is not included and can be purchased separately.