I took 105mm f2.4 SMC Takumar, SMC Pentax 6x7 45mm f4 and the SMC Takumar 135mm Macro + Filters I used the 'Matrix ' metering and all were perfectly exposed using 200 ASA as film was old dated 06/2005
105mm f2.4 lens with Pentax Polariser

105mm f2.4 lens @ f16 with Cokin 'Incolor Centre Spot Filter

105mm f2.4 lens at FULL APERTURE f2.4 and 1/1000th second

45mm f4 SMC Pentax 6x7 @ f11

45mm f4 SMC Pentax 6x7 @ f11 and Cokin Grad Grey filter 'P' size
