The Pentax FA 50mm f1.4 prime lens was the first lens I was able to get hold of for barely two months before selling it back to ebay. The lens was a marvel to behold and the first prime lens which introduced me to the wonderful side of long exposures at night. There was a bit of focus hunting in poorly lit areas but quick and easy on shooting average lit subjects at night with that typical sound of shutter blades closing in while making each shot.
The problem with the copy I had from its previous owner was a bit of inner dust and a few very fine dust particles on the front of the lens which could hardly be removed by cleaning cloth which I suspect was attracted to the magnetic properties of the lens glass. Unable to assure if the inner dust was an early sign of fungus made me so insecure to keep it that prompted me to sell it back on ebay. With my LBA (Lens buying Syndrome) just beginning to unfold it was the first occasion where I learned to get used to the sensation of loving and letting go of a lens (or a camera body) as far as my photographic pursuit goes.
As of this writing (24 July 2016) this lens remains on the Pentax lens line up at SRS Microsystems with a marked price of £309.00. Having a lens like this that has seen the film days gone by to advent of digital age and still being in production makes it a versatile and indispensable lens nonetheless.
SMC Pentax FA 50mm f1.4 lens specs: Maximum aperture: F1.4. Minimum aperture: F22. Angle of view: 31°. Lens construction: 7 elements in 6 groups. Minimum focus distance: 45mm. Weight: 270g. Dimensions: 38mm x 63.5mm. Filter size: 49mm.