Is the pentax hd d fa 70 210mm f 4 ed sdm wr good for portraits?

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From Pentax HD D FA 70-210mm f/4 ED SDM WR: Pentax HD D FA 70-210mm f/4 ED SDM WR: A zoom lens by Pentax for Full frame cameras, 70-210mm f/4. A lighter alternative to the f/2.8 telephoto zoom. Specs - Maker: Pentax - Focal length: 70-210mm (zoom) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Pentax K - Stabilised: no - Autofocus: yes What it frames like - On full frame (Pentax K): as marked, 70-210mm. - On APS-C (Pentax K): like 105-315mm on full ...

From Portraits: The lenses: - 50mm f/1.8. The cheapest great lens in photography, made for almost every mount. On full frame it's a natural, slightly tight view; on APS-C it behaves like a classic 75-80mm portrait lens. If you buy one lens for people, buy this. - 85mm f/1.8. The classic full-frame portrait lens: flattering perspective, soft backgrounds, comfortable working distance. On APS-C, a 56mm f/1.2 to f/1.4 plays the same role. - 35mm ...

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