SMC Pentax-M 20 мм f/ 4 Lens

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Optical design

Format: 35mm SLR

Type: Prime lens

Focusing: Manual Focus (MF)

Lens mounts: Pentax K

First year of production: 1977

Last year of production: 1984

Optical design: 8 elements in 8 groups

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Average price: $500

Specifications:

Focal length	Max. aperture	Min. aperture	Blades	Min. Focus (m.)	Filter Ø (mm.)	Weight (gr/oz)	Length (mm/in)
20mm	f/4.0	f/22	5	0.25	49	150/5,3	30/1,2

Additional information:

The SMC Pentax-M 20 mm f/4 is an ultra-wide angle manual focus prime lens for 35 mm Pentax К SLR cameras.

Links to online resources:

Bojidar Dimitrov's Pentax K-Mount Page

Posted by: Rabkor Date of publication: 18.08.2012

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Mechanical quality	3.50	2
Optical quality	3.50	2
Usability	3.50	2
Pricing / Value	3.50	2
Bokeh	3.50	2
Overall lens rating	3.50

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