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SMC Pentax-FA 645 150mm F2.8 [IF] Review RSS Feed

SMC Pentax-FA 645 150mm F2.8 [IF]

Reviews Views Date of last review
8 46,141 Sun December 3, 2017
Recommended By Average Price Average User Rating
100% of reviewers $633.75 9.50
SMC Pentax-FA 645 150mm F2.8 [IF]


Medium telephoto lens with autofocus. This lens has internal focusing and is half a stop faster than its A-series counterpart.

SMC Pentax-FA 645 150mm F2.8 [IF]
©, sharable with attribution
Image Format
645 film
Lens Mount
Pentax 645
Aperture Ring
Yes (A setting)
Automatic, 8 blades
7 elements, 7 groups
Mount Variant
645 AF
Check camera compatibility
Max. Aperture
Min. Aperture
AF (screwdrive)
Min. Focus
120 cm
Max. Magnification
Filter Size
67 mm
Internal Focus
Field of View (Diag. / Horiz.)

645 Digital: 21 ° / 17 °
645 Film: 26 ° / 21 °
PH-RBF 67 bayonet
Lens Cap
Plastic clip-on
Weather Sealing
Other Features
Push-pull AF/MF Focusing Ring
Diam x Length
74.5 x 96 mm (2.9 x 3.8 in.)
500 g (w/o attachments) (17.6 oz.)
Production Years
(in production)
$1099 USD current price
Engraved Name
smc PENTAX-FA 645 1:2.8 150mm [IF]
Product Code
User reviews

Screwdrive AutofocusAperture RingAutomatic ApertureMedium-Format SupportAdapter needed for DSLRs
Purchase: Buy the SMC Pentax-FA 645 150mm F2.8 [IF]

Add Review of SMC Pentax-FA 645 150mm F2.8 [IF] Buy the SMC Pentax-FA 645 150mm F2.8 [IF]
Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 1-8 of 8
Site Supporter

Registered: January, 2009
Location: East Bay Area, CA
Posts: 6,025
Lens Review Date: December 3, 2017 I can recommend this lens: Yes | Price: $1,000.00 | Rating: 9 

Pros: light, super sharp
Cons: plastic body, if that's a con
Sharpness: 9    Aberrations: 9    Bokeh: 9    Handling: 9    Value: 9    Camera Used: 645D and 645Z   

I've owned this lens for many years and have tended to use it for landscape panos where I need some reach. For that, stopped down to f/9-f/11 it is a wonderful solution.

I had not paid much attention to this lens for portraits until very recently. At f/2.8 it is too soft for my liking, but stopped down to f/4, the lens makes a great head and shoulder portrait lens. The bokeh is very nice from 2.8-5.6 . On pixel peeping a recent portrait shoot, the irises and eyelashes of my subjects were ridiculously sharp, more so than I require from a portrait lens. I am again impressed with the versatility of the lens.

The body is light due to plastic shell build, which is not my fave vs the buttery smooth metal focus rings of the A series lenses, but, for an AF lens, I am willing to overlook that, lol.


wide open:
Horsetail Reed

Uncommon Valor

The Harbormaster

wide open:
Old Shiloh Church
Forum Member

Registered: July, 2017
Posts: 51
Lens Review Date: November 17, 2017 I can recommend this lens: Yes | Price: $400.00 | Rating: 9 

Pros: really light, sharp, cheap
Cons: plastic construction
Sharpness: 9    Aberrations: 9    Bokeh: 9    Handling: 9    Value: 10   

My copy on a 645z would be hard to fault. Central sharpness is ok wide open, very good by f5.6. Probably optimum at f8 to f11.

Except to say that the light weight makes it feel cheap, I can't think of any real negative. Combination of price, IQ, and light weight make this lens altogether worth consideration.
Forum Member

Registered: January, 2013
Location: Dallas, TX
Posts: 71
Lens Review Date: May 1, 2015 I can recommend this lens: Yes | Price: $1,000.00 | Rating: 10 

Pros: Sharp, bokeh, lightweight, fast AF, aperture ring
Cons: wish it is f2.0!
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 10    Camera Used: 645D   

if you want a fast portrait prime... you can't go wrong with this. 10/10.

It's SUPER lightweight for 150mm 2.8, small size definitely helps ability to handhold it.

Nice deep lens hood really protects the lens very well. Love the hood.

Very sharp at 2.8, can't complain, though not as sharp as 90mm SR macro.

Bokeh is excellent. Really gives the 3 dimensional look.

Having aperture ring is nice! easily adaptable to mirrorless.
Veteran Member

Registered: February, 2010
Location: Fowlmere, UK
Posts: 709

1 user found this helpful
Lens Review Date: February 17, 2012 I can recommend this lens: Yes | Price: $370.00 | Rating: 10 

Pros: sharp, good AF, fast, light
Cons: no f. 32; ř67mm
Sharpness: 10    Bokeh: 10    Handling: 10    Value: 10   

A great portrait lens, at the 90mm equivalent of 35 FF—wrinkles and pores are sharp even when used wide open, at least in the centre. Nice bokeh. I found the AF fast and accurate enough, while the lens is fast and light—at least relatively speaking. It focuses closer than its A 3.5/150mm sibling (which is no dog itself, but different). It has a convenient bayonet hood. Smallest aperture is only 22.
Junior Member

Registered: November, 2009
Posts: 29
Lens Review Date: August 8, 2011 I can recommend this lens: Yes | Price: $550.00 | Rating: 10 

Pros: bokeh, size, sharpness
Cons: none
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 10   

This is my most used lens on the 645D. While the corners are a little soft wide open, by f3.4 things sharpen up and the center seems critically sharp. I thus try to use from f3.4 to f5.6, depending on how much DOF I want in the image.

It is excellent for portraits as well as landscape and still life subjects. Focusing is very positive and fast. This lens combined with the 300/5.6 makes for a very light weight telephoto travel package.
Forum Member

Registered: July, 2011
Posts: 72
Lens Review Date: July 29, 2011 I can recommend this lens: Yes | Price: $750.00 | Rating: 9 

Pros: Focus, sharpness, weight
Cons: very shallow depth of field at f 2.8

Very fast and accurate focus. This lens is a wonderful portrait lens. From f4 to f11 you get very good results. The fast aperture of 2.8 combined with the long focal length provide a very shallow depth of field.
I use this on a 645D and it performs very well.
Site Supporter

Registered: November, 2008
Location: Washington DC, USA
Posts: 566
Lens Review Date: May 15, 2009 I can recommend this lens: Yes | Price: $400.00 | Rating: 10 

Pros: Relatively lightweight. Fast. Sharp.
Cons: Close focus distance, but this is minor.

This is a fantastic portrait lens. It is wonderfully fast and I have no problems with autofocus on a 645N body. Adding some extension tubes or a close up diopter filter are the only things that make it better. Stellar, lovely lens.

Registered: July, 2008
Location: Luxembourg
Posts: 4,521
Lens Review Date: March 25, 2009 I can recommend this lens: Yes | Price: $600.00 | Rating: 9 

Pros: Well build, quick shift
Cons: Heavy

Very bright portrait lens. It is heavy (500gr) but well balanced with the body.

Add Review of SMC Pentax-FA 645 150mm F2.8 [IF] Buy the SMC Pentax-FA 645 150mm F2.8 [IF]

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