Better than expected 78

The partially negative assessments and observations have so far prevented me from acquiring the lens, but as it was now available at Warehouse Deals for Pentax K bayonet I slammed. So far I have only appropriate focal lengths by subsequent enlargement (when using a telephoto zoom up to 300mm) reached or intermediate rings. Or by a Einschraubsatz front of the lens (which is wirklichst worst quality and a waste of money)
This - admittedly - very unwieldy lens for Pops price but can be - expected to set you have good lighting or a> very price-performance: Very good
Performance (price independently) could of course be even better (automatic connections, optical quality), but is then only up to a multiple of the price achievable.
Buy recommendation!