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SMC Pentax 150mm F4

Reviews Views Date of last review
3 26,517 Fri March 22, 2019
Recommended By Average Price Average User Rating
100% of reviewers $111.67 9.33
SMC Pentax 150mm F4

SMC Pentax 150mm F4
SMC Pentax 150mm F4

This lens has a relatively slow maximum aperture and was therefore succeeded by a smaller M version featuring F3.5.

SMC Pentax 150mm F4
©, sharable with attribution
Image Format
Full-frame / 35mm film
Lens Mount
Pentax K
Aperture Ring
Yes (no A setting)
Automatic, 6 blades
5 elements, 5 groups
Mount Variant
Check camera compatibility
Max. Aperture
Min. Aperture
Min. Focus
180 cm
Max. Magnification
Filter Size
52 mm
Internal Focus
Field of View (Diag. / Horiz.)

APS-C: 11 ° / 9 °
Full frame: 16 ° / 14 °
Dedicated hard case
Lens Cap
Plastic clip-on
Weather Sealing
Other Features
Diam x Length
63 x 96 mm
373 g
Production Years
1975 to 1977
Engraved Name
SMC PENTAX 1:4/150
Product Code
User reviews
Manual FocusAperture RingFull-Frame SupportDiscontinued
Price History:

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Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 1-3 of 3
New Member

Registered: July, 2016
Location: Toronto
Posts: 3
Lens Review Date: March 22, 2019 I can recommend this lens: Yes | Price: $70.00 | Rating: 10 

Pros: Sharp, Light weight, Relatively small, Build quality
Cons: None
Sharpness: 10    Aberrations: 9    Bokeh: 8    Handling: 9    Value: 10    Camera Used: Ks-2   

One of the sharpest lens ever used. It has no balsam between elements, then it keeps its image quality over time and last for ever if you keep it in good environmental condition. because of its long focal distance, you have to use image stabilization or tripod to reach the best results in indoor lighting condition. very good lens overall.
Junior Member

Registered: December, 2012
Location: Cirebon
Posts: 29
Lens Review Date: April 17, 2016 I can recommend this lens: Yes | Price: $70.00 | Rating: 10 

Pros: 3D, Lightweight, Build quality and Clarity
Cons: Rare
Sharpness: 10    Aberrations: 8    Bokeh: 10    Handling: 9    Value: 10   

This focal length is suitable for "All Around Tele". I can not complain about the weakness cause i've got cheap.
Site Supporter

Registered: October, 2008
Location: Vancouver, Canada
Posts: 6,627

3 users found this helpful
Lens Review Date: September 22, 2009 I can recommend this lens: Yes | Price: $195.00 | Rating: 8 

Pros: Size, weight and 52mm filter size.
Cons: Cost, rarity & slow f4.0 maximum aperture.
Camera Used: K Series film bodies (K1000, KM, KX, K2, K2DMD)   

The K150/4 is the middle of the three K series budget medium telephoto lenses. (The others are the K135/3.5 and the K200/4.)

These lenses have fewer elements and being slow, have a long thin light weight design. Unlike the other two the K150/4 is on the rare side, so it will cost you more. This is due to the somewhat unpopular 150mm focal length on film. The 135mm & 200mm focal lengths were the big sellers and Pentax made multiple lenses in each FL. There was also an M version of the 150mm lens, but in 1986 Pentax finally deleted the 150mm from their lineup.

The K150/4 is a “meat & potatoes” lens, nothing fancy here, just a solid performer. The K150/4 is reasonably sharp, easy to focus and has decent colour rendition. However the K150/4 is too slow for anything other than daylight shooting, this is not a low light/indoor lens. The K150/4 has the popular K series 52mm front filter thread and shares a hood with the K120/2.8 & K135/3.5.

I will use the K150/4 mostly when I travel and want to take a few light weight lenses with the same filter size. I would use the K150/4 when I need something longer than the more versatile 135mm focal length. When I’m at home and size is not an issue, the K150/4 will benched in favor of my K135/2.5 and K200/2.5.

Here is a picture of the three "budget" K series medium telephotos:

Sample shots taken with the K150/4. Photos are medium resolution scans from original slides or negatives.

Camera: K2 Film: Fuji Velvia 100 ISO: 100

Camera: LX Film: CineStill Film 50 ISO: 50

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