Pentax K-7 Telephoto lenses

"Great lens for taking pictures of the kids, fast, smooth zoom and I don't have to be in their face to get a shot, very sharp pictures..." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Zoom range	2.7x			Length	137 mm
	Fixed aperture	Yes			Aperture	f/2.8
	Min focal length	50 mm			Weight	0.7 kg
	Max focal length	135 mm			Diameter	76 mm

"It is light weight, very smooth, very sharp images" bhphotovideo.com

Quite short 64 mm

	Zoom range	1x			Length	64 mm
	Fixed aperture	n/a			Aperture	f/2.8
	Min focal length	100 mm			Weight	340 g
	Max focal length	100 mm			Diameter	81 mm

"I've used this lens now for about 1200 shots of lacrosse games taken in the evening/night under the lights, bright sun and cloudy days. Great resolution when the focus is spot on." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Zoom range	4.2x			Length	168 mm
	Fixed aperture	Yes			Aperture	f/4
	Min focal length	60 mm			Weight	1 kg
	Max focal length	250 mm			Diameter	81 mm

"Unbelievable image clarity with zero distortion. Impressive build and quality workmanship." bhphotovideo.com

	Zoom range	1x			Length	135 mm
	Fixed aperture	n/a			Aperture	f/2.8
	Min focal length	200 mm			Weight	0.8 kg
	Max focal length	200 mm			Diameter	84 mm

"Incredible! From the very first moment you look through the view-finder, you'll see the difference. It puts other lenses to shame, especially zooms. Razor sharp!" bhphotovideo.com

	Zoom range	1x			Length	183 mm
	Fixed aperture	n/a			Aperture	f/4
	Min focal length	300 mm			Weight	1.1 kg
	Max focal length	300 mm			Diameter	84 mm