Pentax DA 40mm f/2.8

Last updated (19 July’10):
– Review by Photodo

The Pentax DA 40mm f/2.8 features 40mm at focal length with maximum aperture of F/2.8. The lens construction has 5 elements in 4 groups and has diagonal angle of view at 39 degrees. Closest focusing distance at 15.7 inches (0.4m) and has a filter size of 49mm. The Pentax DA 40mm f/2.8 lens weighs 3.2 oz. (90g) and it measures 2.5 inches in diameter and 0.6 inches long.

Pentax DA 40mm f/2.8
Overall Rating: ★★★★☆ | Latest Price Info

Expert Reviews

Pentax DA 40mm f/2.8 Reviews

Photodo reviews the Pentax DA 40mm f/2.8 and writes;
“Contrast is good and colour rendition is pleasant. Resolution is maintained right across the width of the frame and all the way into the corners. Some lenses from Pentax have been accused of back focus on the *istDS but our tests proved that this was not the case, certainly with this lens even at the closest focus point and wide open.”
rating: N/A

CameraLabs compares the Pentax DA 40mm f/2.8 to Pentax DA 70mm f/2.4 and writes;
“the DA 70mm did prove to be the sharper of the two in our tests, and despite coloured fringing being visible even in the middle of the frame on some occasions, it was the model we ultimately preferred. Its longer focal length and brighter aperture allow for a very small depth-of-field and it unsurprisingly excels for portraiture.”

Rating: ★★★★☆

Photozone reviews the Pentax DA 40mm f/2.8 and writes;
“The Pentax SMC DA 40mm f/2.8 exhibits a very harmonious optical performance combined with excellent build quality. It is capable to produce very sharp images across the frame straight from the max. aperture. Distortions are marginal and CAs are a non-issue. Vignetting is quite pronounced at f/2.8 but not a show-stopper. The bokeh (out-of-focus blur) is pretty smooth.”
Rating: ★★★★☆

User Opinions

Pentax DA 40mm f/2.8 User Reviews

Pentax DA 40mm f/2.8 Ultra Compact Lens for Pentax *ist Digital SLR Cameras | Rating: ★★★★★
“The Pentax DA 40mm f/2.8 Ultra Compact Lens for Pentax *ist Digital SLR Cameras is a great prime lens. Gave me nice clean, clear photos with excellent detail and color reproduction. Comes with a lens pouch and a lens cap that also doubles as a lens hood. “ – by Charles Teraoka

Great walk around lens | Rating: ★★★★★
“The f/2.8 aperture is nice and fast, especially if you’re coming from the kit lenses. It’s fast enough to take pictures indoors (shake reduction doesn’t hurt either) and creates a pretty narrow depth of field for portraits. The super compact size makes my K100D feel very light and easy to carry around. It’s perfect for outings where you’ll end up taking pictures of people and close objects. The autofocusing is super fast and I haven’t seen it hunt around like my DA 18-55mm and 50-200mm lenses.” – by James Lin

Excellent quality | Rating: ★★★★★
“For pentax digital body users, for standard fixed focal length lens most popular choice would be a FA35mm f2.0 and this DA40(for this price-under $300! it’s good!) DA40 is surely better as it is small and light. The image quality was satifactory. It is a bit dark(f2.8) but I had no problem to take picture of my 2 year old baby in the room(night) without flash.” – by Young Bae Park

Good Purchase | Rating: ★★★★★
“I bought this after getting the Pentax FA 50mm f/1.4. The Pentax FA was slow on autofocus, but the DA’s (this lens and the kit lens) are much faster. It’s a little bit wider but not by much. Most things you photograph are not 1.4 so 2.8 is still really good. The lens is rather flat with a small lens cap, which I’ll probably lose at some point. “ – by Stacy Baum

Great, unique lens on a budget | Rating: ★★★★★
“It performs fairly well in low-light, thanks also to the low aperture. The build quality is excellent, as the construction is all-metal, and it comes with a unique hood and cap. The construction conveys quality and confidence when shooting, and I’ve actually had no problems manipulating the small focus ring. this lens is a great deal. The build quality is awesome, it is very versatile and convenient, and the price, like most Pentax lenses, is super low for what you get.” – by Brendan Bhagan

tiny sharp lens | Rating: ★★★★★
“The 40mm focal length on digital gives a 60mm view which is very good for candids and the like. The lens is very well built and focuses very quickly, this apparently is one of the fastest focusing lenses Pentax has but the AF is a bit loud since it is old screw drive. Sharp at F2.8 but shines at F5.6 and the sharpness is very even across the frame, it’s not as sharp as the 35mm in the center but it’s far more evenly sharp across.” – by Brendan Bhagan

Tiny lens with stellar built and image quality | Rating: ★★★★★
“Pentax 40mm Limited f/2.8 lens is an exotic lens which can produce a really nice image quality even wide open at f/2.8. Physically, it is very small and thin even with the lens hood attached. It can focus pretty close 30cm to infinity. When you focus in, the lens will rotate and protrude around 1/2 inch. This lens is capable to produce very good quality image with nice background blur at f/2.8. It is also very sharp that it can capture speckles of dust. The focal length is equivalent to 60mm which is considered a standard lens. “ – by Enche Tjin

superb | Rating: ★★★★★
“No doubt this is a great lens – sharp, high-grade build quality, extremely compact. I think the sharpness, color and CA control out-perform my SMCTak 55/1.8 and 50/1.4. Most appealing to me is the combination of size and quality – I mount it on my istDL, making an almost-pocketable, high-quality shooting device. “ – by Zhibin Yang

An Amazing Lens | Rating: ★★★★★
“It is tiny, easy to handle hold, even with one hand, incredibly sharp. Even though it is not very long, it can be used as a portrait lens. It has great edge to edge sharpness and amazing micro contrast. Build is very sturdy.” – by Elaine B. Waldron

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Pentax DA 40mm f/2.8 Sample Photos

Pentax DA 40mm f/2.8 Sample Photos @
Pentax DA 40mm f/2.8 Sample Photos @
Pentax DA 40mm f/2.8 Sample Photos @
Pentax DA 40mm f/2.8 Sample Photos @
Pentax DA 40mm f/2.8 Sample Photos @
Pentax DA 40mm f/2.8 Sample Photos @
Pentax DA 40mm f/2.8 Sample Photos @
Pentax DA 40mm f/2.8 Sample Photos @

Features & Specifications

Pentax DA 40mm f/2.8 Specifications

The ultra-compact “pancake” design weighs just 3.2 ounces and is just over a half inch in length. The smc PENTAX DA 40mm F2.8 Limited offers exceptional high-contrast, high-resolution optics with minimal aberrations. The PENTAX-original Quick-Shift Focus System allows instant switching from autofocus to manual focus operation. The enclosed lens hood minimizes flare and ghost images. The focal length is equivalent to 60mm in the 35mm format. Developed specifically for PENTAX digital SLR cameras.

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