Precautions for using a polarizing filter

Size	Lens
49mm	FA 28mm f/2AL, FA Soft 28mm f/2.8, FA 35mm f/2AL, FA 43mm f/1.9 Limited, FA 50mm f/1.4 & f/1.7,
	FA 77mm f/1.8, FA Zoom 70-200mm f/4-5.6, F & FA Zoom 35-80mm f/4-5.6,
	F & FA Zoom 80-200mm f/4.7-5.6, FA Macro 100mm f/3.5
52mm	FA 135mm f/2.8 (IF), FA Soft 85mm f/2.8, FA Macro 50mm f/2.8, FA Zoom 28-70mm f/4 AL
58mm	FA 31mm f/1.8AL Limited, FA Zoom 20-35mm f/4AL, FA Zoom 28-80mm f/3.5-5.6,
	FAJ Zoom 28-80mm f/3.5-5.6AL, FA Zoom 28-90mm f/3.5-5.6, FA Zoom 28-105mm f/3.2-4.5AL (IF),
	FA Zoom 28-105mm f/4-5.6, FAJ Zoom 75-300mm f/4.5-5.8AL, FA Zoom 80-320mm f/4.5-5.6,
	F Zoom 100-300mm f/4.5-5.6, FA Zoom 100-300mm f/4.7-5.8, FA Macro 100mm f/2.8
62mm	FA 28-105mm f/4-5.6 (IF)
67mm	FA 20mm f/2.8, FA★ 24mm f/2AL (IF), FA★ 85mm f/1.4 (IF), FA★ Macro 200mm f/4ED (IF),
	FA★ 300mm f/4.5ED (IF), FA Zoom 24-90mm f/3.5-4.5AL (IF), FA★ Zoom 28-70mm f/2.8AL
72mm	FA 28-200mm f/3.8-5.6
77mm	FA★ 200mm f/2.8ED (IF), FA★ 400mm f/5.6ED (IF), FA★ Zoom 80-200mm f/2.8ED (IF)

The circular polarizing filter is thicker than an ordinary filter.

For this reason, using the circular polarizing filter with lenses as shown on the chart on the right may cause vignetting at the edges of picture.

•Use a circular polarizing filter with Autofocus camera for proper exposure and auto focusing.

Pentax SMC -FA manual Precautions for using a polarizing filter, Size Lens