Originally Posted by Wishy
I've PM'ed you the details of the repair guy
All of the lenses (Other than the 50mm Biotar) are fairly slow, so you might find its a bit hard work focusing. Find on a sunny day, and you can always try and find faster glass.
The longer german lenses do tend to have a decent number of diaphragm leaves, optical quality is normally reasonable. Just give it a try
Got it! Thank you! You've been very helpful.
I'll go out tomorrow and shoot with that 400mm Piesker lens, finally.