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Pentax Lens Review Database » Film Era Pentax K-Mount Lenses » M Prime Lenses
SMC Pentax-M 28mm F2.8 Review RSS Feed

SMC Pentax-M 28mm F2.8

Sharpness 
 8.0
Aberrations 
 8.0
Bokeh 
 7.5
Handling 
 9.3
Value 
 8.9
Reviews Views Date of last review
93 498,863 Sun June 26, 2022
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Recommended By Average Price Average User Rating
94% of reviewers $51.24 8.32
SMC Pentax-M 28mm F2.8

SMC Pentax-M 28mm F2.8
supersize
SMC Pentax-M 28mm F2.8
supersize
SMC Pentax-M 28mm F2.8
supersize

Description:
This popular lens came in two nearly-identical variations, depending on the year of production. The second version had the optical formula of the smc PENTAX-A version and it also looks like an early A lens (no silver decorative ring). Both optical designs have 7 lens elements in 7 groups and a 5 blade diaphragm.

The first two images depict the first version and its optical diagram, while the last image show the second version.


Data for the first version:
SMC Pentax-M 28mm F2.8
© www.pentaxforums.com, sharable with attribution
Image Format
Full-frame / 35mm film
Lens Mount
Pentax K
Aperture Ring
Yes (no A setting)
Diaphragm
Automatic, 5 blades
Optics
7 elements, 7 groups
Mount Variant
K
Check camera compatibility
Max. Aperture
F2.8
Min. Aperture
F22
Focusing
Manual
Min. Focus
30 cm
Max. Magnification
0.12x
Filter Size
49 mm
Internal Focus
No
Field of View (Diag. / Horiz.)

APS-C: 55 ° / 46 °
Full frame: 75 ° / 65 °
Hood
PH-S49 (28/35mm)
Case
Hard case HA-90B
Lens Cap
Plastic clip-on
Coating
SMC
Weather Sealing
No
Other Features
Diam x Length
63 x 31 mm
Weight
156 g
Production Years
1977 to 1982
Engraved Name
smc PENTAX-M 1:2.8 28mm
Product Code
22960
Reviews
User reviews
Variants
This is the original version. The later second version has the optics of the A version and lacks the silver ring.


The second version:
SMC Pentax-M 28mm F2.8 (ii)
© www.pentaxforums.com, sharable with attribution
Image Format
Full-frame / 35mm film
Lens Mount
Pentax K
Aperture Ring
Yes (no A setting)
Diaphragm
Automatic, 5 blades
Optics
7 elements, 7 groups
Mount Variant
K
Check camera compatibility
Max. Aperture
F2.8
Min. Aperture
F22
Focusing
Manual
Min. Focus
30 cm
Max. Magnification
0.12x
Filter Size
49 mm
Internal Focus
No
Field of View (Diag. / Horiz.)

APS-C: 55 ° / 46 °
Full frame: 75 ° / 65 °
Hood
PH-S49 (28/35mm)
Case
Hard case HA-90B
Lens Cap
Plastic clip-on
Coating
SMC
Weather Sealing
No
Other Features
Diam x Length
63 x 31 mm
Weight
170 g
Production Years
1982 to 1984
Engraved Name
smc PENTAX-M 1:2.8 28mm
Product Code
22977
Reviews
User reviews
Variants

This second version of the M 28mm has the optics of the A version and lacks the silver ring.

Features:
Manual FocusAperture RingFull-Frame SupportDiscontinued
Price History:



Add Review of SMC Pentax-M 28mm F2.8
Author:
Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 91-93 of 93
Inactive Account

Registered: September, 2006
Location: Lancaster, PA.
Posts: 2,041
Review Date: January 11, 2007 Recommended | Price: $28.00 | Rating: 8 

 
Pros: Sharp image good little wide angle prime
Cons: Can be a little soft wide open

I picked this lens up as a used lens. The glass was clear and the lens was in mint condition. It was one of the first Manual lenses I bought for my DL. I like the way it preforms. In shadowed light of fading light this lens can be a little soft wide open. Other then that most of my shots with this lens have been crystal clear, and Spot on for focus. This lens works well with any Pentax DSLR.
   
Inactive Account

Registered: December, 2006
Location: Boise, Idaho
Posts: 27
Review Date: January 8, 2007 Recommended | Price: $75.00 | Rating: 7 

 
Pros: Reasonably priced on the used market, compact and lightweight, excellent image quality, only a wee bit soft at f/2.8.
Cons: Some vignetting but not dramtically so.

A good performing lens wide open becoming outstanding at f/4 and smaller apertures. If you have a choice between the 28/2.8 or the 28/3.5, if the price difference is reasonable then go for the f/2.8. If there is a big gap in the price go for the 28 f/3.5 because it too is an excellent performing lens if you don't need the additional speed.
   
Veteran Member

Registered: January, 2007
Location: St-Albert, Alberta, Canada
Posts: 330
Review Date: January 8, 2007 Recommended | Rating: 7 

 
Pros: Sharp images
Cons: none

I have this lens for the past 12 years. Has good color correction and always gave me sharp images. It works well so far on my K10D giving me 42mm. More testing required before I can pronounce judgment in a DSLR.
Add Review of SMC Pentax-M 28mm F2.8



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