First of all I was amazed at the prices that I found on the Internet as follows: 279 MSRP, the so is "street price" between 200-230, which for a camera that costs even 600?
The first haptic impression: This thing is made of black, matt plastic, which does not fit the material the rest camera and acts -also on the hot shoe figuratively senses- well put. Now, the camera acts already significantly greater. It is also important that you really completely defers him and not tilted (otherwise there's strange effects ;-)
The optical quality is impeccable, the display seems generally somewhat brighter than the screen to be, all the status information of the display are also displayed here. For eyeglass wearers: A diopter compensation is possible. Switching between screens is done manually via a small button on the viewfinder below the eyepiece.
If you switch in Web Site Terms of the shooting to the playback mode, the display is switched on again. So again manually turn on the viewfinder ... and to take you with your fingers on the button, to move away from the camera face. The iritiert me something, maybe that's thought so, then you should but this behavior can be configured.
In recording mode, raises another issue: Is the display turned off, I can not use the display for manual control, so touching something, select a focus point or similar.. So off and switch manually or more times :-(. Therefore, it would be highly desirable that the sensitivity of the display would be maintained, particularly the concern is unfounded, that could be adjusted with a -normal gewachsenen- nose on display something.
Despite these limitations, an application found in which I really appreciate the viewfinder: Because I do not always have a tripod here, I will turn the camera back before against a wall or the like to fix the camera... Then so far I could not determine the image. This is now, thanks to expandability up to 90 °, then the optics with a waist-level viewfinder is similar.
So the seeker is a useful accessory that I would definitely recommend, because of the described functional limitations and disproportionate price I forgive but still only three stars.