Muscular Arm Flexing Bicep in Studio Lighting

close-up studio photograph of a muscular human arm flexing the bicep, cropped composition showing only the bent arm and partial shoulder/upper torso entering from the right edge, defined veins and muscle striations, natural skin texture, athletic physique, isolated against a smooth dark charcoal gray background, dramatic side lighting from upper left creating highlights on the bicep and deep sculpted shadows, shallow depth of field, high contrast, realistic skin tones, minimal clean fitness portrait aesthetic, sharp detail, professional studio lighting, 85mm lens look