Pentax K10D Macro lenses made by Zeiss that have a f/2.8 or faster aperture

"The fingers tactile involvment of the smooth action of the focusing ring and the eyes involvment with the superb sharpness of the Makro-Planars optics on the focusing screen is an experience unique in photography these days with mass produced auto focus lenses the norm. "

	Aperture	f/2			Weight	0.7 kg
	Min focal length	100 mm			Diameter	76 mm
	Max focal length	100 mm			Auto focus	No
	Length	89 mm			Zoom range	1x

"Words really cannot describe the overall satisfaction that this fine lens brings to the user. I highly recommend anyone interested in what quite possibly might be a future legendary piece of glass to give this one a try. Is there anything not good about this lens? Nope. Not a thing. As my title says...my new benchmark."

	Aperture	f/2			Weight	0.5 kg
	Min focal length	50 mm			Diameter	72 mm
	Max focal length	50 mm			Auto focus	No
	Length	65 mm			Zoom range	1x