Pentax SMC Pentax-A 50mm f/2 - Pentax K Mount

The SMC Pentax-A 50mm f/2 is a standard prime lens featuring the 'A' setting on the aperture ring, allowing for shutter priority and program auto-exposure modes on compatible Pentax bodies. It retains the compact optical formula of its predecessor while introducing electrical contacts for body-to-lens communication. It is a reliable, budget-friendly standard lens that delivers sharp results with natural colour rendition. On the used market, ensure the 'A' lock button on the aperture ring functions correctly and that the electrical contacts are clean and free from corrosion. The plastic barrel construction is lighter than earlier metal versions but remains durable if handled well. SDS inspects for internal haze, particularly on the rear elements, and confirms that the diaphragm snaps shut instantly at all settings.