JuzaPhoto uses technical cookies and third-part cookies to provide the service and to make possible login, choice of background color and other settings (click here for more info).

By continuing to browse the site you confirm that you have read your options regarding cookies and that you have read and accepted the Terms of service and Privacy.

OK, I confirm

You can change in every moment your cookies preferences from the page Cookie Preferences, that can be reached from every page of the website with the link that you find at the bottom of the page; you can also set your preferences directly here

Accept Cookies

Customize

Refuse Cookies

Pentax M SMC 20mm f/4 : Specifications and Opinions

Lens photo unavailable

The Pentax M SMC 20mm f/4 is a wide-angle lens for FF and APS-C, manufactured from 1977 (discontinued). The focus is done by Manual Focus, it does not have image stabilization.

4 users have given it an average vote of 9.0 out of 10.

Specifications
Focal lenght	20 mm
Angle of view	94.5°
Format	FF, APS-C
Max. aperture	f/4
Aperture blades	5
Lenses/Groups	8 elements in 8 groups
Min. focus distance	0.25 meters
Reproduction ratio	0.12x
Features
Stabilization	No
Focus	Manual Focus
Internal Focus	No
Built and notes
Tripod ring	No
Extenders	No
Filters	49 mm
Lens hood	Yes (not supplied)
Weather sealing	No
Weight	150 g
Dimensions	63 x 29 mm
Buy
Pentax M SMC 20mm f/4, buy on Ebay JuzaPhoto contains affiliate links from Amazon and Ebay and JuzaPhoto earn a commission in case of purchase through affiliate links.

Publish your advertisement on JuzaPhoto (info)

Reviews

What do you think about this lens?

Do you want add your opinion? You do it by joining JuzaPhoto, it is easy and free!

There is more: by registering you can create your personal page, publish photos, receive comments, join discussions and you can use all the features of JuzaPhoto. With more than 256000 members, there is space for everyone, from the beginner to the professional.

The following opinions have been automatically translated with Google Translate.

Bm75

sent on December 21, 2017

Pros: mechanical construction, minimum weight and size, clarity, flare resistance, low distortion on the right

Cons: nobody

Opinion: Used only on the right is my favorite optics on K5. superb optical rendering with full colors and well-managed contrasts. It is very very clear. Despite the age does not suffer on apsc of any particular aberration. Just closing the diaphragm is clear from one meter to infinity on apsc thanks to the hyperfocal due to the focal length. this is a nice advantage of apsc because we have the hyperfocal of a 20 mm Ff with the focal equivalent of a 30. Being a lens that is the excellent condition at about 100 euros I would say that is a great purchase and thanks to the ring of the diafrmmi present also allows a mirrorless use also FF.

Stefano Banda

sent on February 10, 2017

Pros: Small and lightweight, rugged construction, the complete absence of fraying

Cons: A bit 'dark, completely manual, color rendering a bit' cold

Opinion: Despite having 40 years is a perspective that still behaves well with the sensor, rather demanding, riding K-3. E 'completely manual and completely devoid of electrical contacts, so exposure should be calculated, because the camera does not know which diaphragm is set. Like all the objectives of the past, is of robust construction and diaphragms are marked with a "click" that leaves no doubt. It is not very bright, which may be a limit in some case, however, the 20 mm focal length ensures a good margin with the safety times. At the maximum aperture the sharpness falls a bit 'on the edge, but just close to f / 5.6, and the problem is resolved great. Only the colors are not that great. Unlike big brother 28mm f / 2.8, this has made it a bit 'chilly and certain shots need to "warm them" a bit' in PP. It is online or at flea markets for a few tens of euros, and it may be worth it.

Marco S Sandri

sent on August 11, 2015

Pros: Sharpness, resistance to flare, size, weight, construction

Cons: Opening f4, it is completely manual

Opinion: I bought this lens now a year ago after reading the great reviews and viewed some samples.rnNe I was impressed by the extreme sharpness, for the full and saturated colors and the amazing resistance to flare! RNE really small, mounted on reflex makes it compact and easy to handle, when I travel I just can not staccarlo.rnSebbene manual is its perfect construction makes it extremely easy to use!

Photos taken with Pentax M SMC 20mm f/4

The three oaks

by Marzio Iotti
61 comments, 3112 views

Reflective landscape

by Marzio Iotti
26 comments, 1094 views

Landscape 1

by Marzio Iotti
5 comments, 719 views

Cityscape 2

by Marzio Iotti
13 comments, 197 views

Bicycles

by Marzio Iotti
16 comments, 227 views

Italy

by Marzio Iotti
11 comments, 1131 views

The gondolas of Charon

by Marco S Sandri
10 comments, 1779 views

Stupinigi - Notturno

by Bigisbetter
3 comments, 843 views

Publish your advertisement on JuzaPhoto (info)

Rocks

by Marzio Iotti
5 comments, 111 views

Landscape 12

by Marzio Iotti
12 comments, 791 views

Landscape 5

by Marzio Iotti
5 comments, 862 views

A walk

by Marzio Iotti
0 comments, 103 views

My hens

by Marzio Iotti
13 comments, 834 views

View from Malga Flavona - Dolomites

by Marco S Sandri
0 comments, 1280 views

My friend

by Marzio Iotti
3 comments, 883 views

Untitled Photo

by Eugen Frunza
5 comments, 1052 views

HI RES 9.2 MP

Milan Cordusio

by Marco S Sandri
3 comments, 999 views

Palace of Merchandise (Bologna)

by Bigisbetter
0 comments, 964 views

Castle of the angels - group of steaming

by Marco S Sandri
1 comments, 1822 views

Tops or stormy sea?

by Marco S Sandri
2 comments, 1052 views

Campaign 2

by Marzio Iotti
4 comments, 85 views

No Title

by Marco S Sandri
1 comments, 1049 views

The lake

by Marzio Iotti
2 comments, 738 views

Milan street food

by Marco S Sandri
0 comments, 1151 views

Infrared on Val Leogra

by 26switar
0 comments, 1107 views

Mount Baldo

by Marzio Iotti
4 comments, 590 views

Plain

by Marzio Iotti
2 comments, 80 views

Untitled Photo

by Bm75
2 comments, 1120 views

Castle of the angels from Pra '

by Marco S Sandri
2 comments, 1093 views

On the river Enza

by Marzio Iotti
3 comments, 128 views

Lewisia

by Eugen Frunza
5 comments, 810 views

HI RES 10.5 MP

Primaneve

by Marco S Sandri
0 comments, 969 views

Publish your advertisement on JuzaPhoto (info)

People in showcase

by Marco S Sandri
0 comments, 980 views

Isoppo, the old

by 26switar
1 comments, 803 views

HI RES 6.0 MP

Fast Babila

by Marco S Sandri
0 comments, 1006 views

Expo - Poland Pavillion_1

by Marco S Sandri
0 comments, 1077 views

Tree

by Marzio Iotti
4 comments, 101 views

HI RES 10.7 MP

The sample photos are selected automatically between all photos posted by JuzaPhoto members, using the camera and the lens selected in the techs. If you find evident errors (e.g. photos taken with cameras and lenses that are not available yet), you can contribute to improve the page by sending a private message to the user that has entered incorrect values in the photo caption.

Reviews » Lenses » Lenses Pentax » Pentax M SMC 20mm f/4

Pentax M SMC 20mm f/4 : Specifications and Opinions

Buy

Offerte Usato RCE

Reviews

What do you think about this lens?

Photos taken with Pentax M SMC 20mm f/4