Tests and reviews for the lens Pentax smc DA 40mm f2.8 XS
Measurements and specifications
| Announced | 2012-02-01 |
| Indicative price (USD) | 250 |
| Aperture | f/2.8 |
| Focal range (mm) | 40 |
| Filter diameter (mm) | 27 |
| Max diameter (mm) | 63.5 |
| Mount type | Pentax KAF |
| Stabilization | No |
| AF Motor | No |
| Zoom type | / |
| Rotating front element | No |
| Tripod mount | No |
| Color | Black, Silver |
| Full-Time manual focus | No |
| Number of lenses | 5 |
| Number of groups | 4 |
| Diaphragm blades | 9 |
| Circular aperture | Yes |
| Length (mm) | 9.14 |
| Weight (gr) | 51 |
Certain fields may be left blank. They will be updated as soon as possible.
in P-Mpix
in EV
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in micrometer
Further readings for the Pentax smc DA 40mm f2.8 XS
To provide photographers with a broader perspective about mobiles, lenses and cameras, here are links to articles, reviews, and analyses of photographic equipment produced by DxOMark, renown websites, magazines or blogs.
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Announced this past June alongside the Canon EOS Rebel T4i DSLR camera, the new Canon EF 40mm f/2.8 STM is an ultra-slim, entry-level pancake lens that uses Canon’s Stepping Motor Technology (STM) to enable extra-quiet continuous autofocus, making it well-suited for video shooting. |
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The new lightweight smc Pentax-DA 40mm f/2.8 XS strives to be a versatile weapon in a photographer’s arsenal of lenses. But the dainty lens, weighing only 51 grams and measuring a slim 9mm in thickness, needs a little more beef – at least that’s what DxOMark determined after putting the lens’ optics through our rigorous tests. |
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The Pentax K01, Pentax’s first serious hybrid, turns in a great performance, arriving in second place in its category. All of the results are available here: Pentax K-01. |
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Here is a new series featuring the results of Pentax prime lenses mounted on the compatible camera with the best resolution thus far, the Pentax K5. (But as usual, you can consult DxOMark to see the results for these lenses when mounted on other compatible camera bodies, such as the Pentax K7 or Km.) |
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Following the hybrid camera trend and after the limited success of the Pentax Q, Pentax is announcing today a new compact camera with interchangeable lenses, the Pentax K-01. |
Comments
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Added by Class A |
October 28, 2012
DxOMark Lens Score is Broken
The original DA 40/2.8 has better resolution and performs much better regarding CA. Yet, the new XS version gets a better DxOMark Score.
Who cares about T-Stops (a 3.1 vs 2.9 difference anyhow) or minute differences in vignetting? I applaud your sensor testing and white papers, but your lens testing seems broken. All Pentax lenses seem to be penalised for comparatively low T-Stops but I doubt that with today's high-ISO performances, this aspect of lenses really matters. Reply |
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Added by HowardAbraham |
June 13, 2012
Passes the Real World test just fine
I received the XS last week and took hundreds of photos with it, both indoors and outdoors this past weekend. I then imported the photos into Lightroom 4, so it's possible that LR4 compensated for any lens irregularities. In any case, I saw some fantastic results in terms of color, clarity, and depth of field. The 40mm focal length was quite liberating. I'm just an enthusiast and not a pro but I love this lens. And it's so tiny there is no reason not to carry it in your bag at all times.
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Added by will_db |
June 08, 2012
Really?
I am surprised to see such a poor account of this lens, given how well it has done in other reviews, e.g. Photozone.de:
"The Pentax SMC DA 40mm f/2.8 exhibits a quite harmonious optical performance combined with excellent build quality. It is capable to produce impressively sharp images across the frame straight from the max. aperture. Distortions are marginal and CAs are a non-issue. Vignetting is visible at f/2.8 but not a show-stopper. The bokeh (out-of-focus blur) is slightly sub-average and bokeh fringing can be an issue at very large apertures. The lens does also suffer from a focus shift when stopping down - this can have an impact in close focus scenarios". I wonder if DXO's boffins are really as good at reviewing lenses as *real photographers* who recognise the practical applications of lenses. Reply |