Pentax DA 40mm f/2.8 XS Lens

Model #22137

USA Version
Pentax 22137 1
Pentax 22137 1
Pentax 22137 5
Pentax 22137 2
Pentax 22137 4
Pentax 22137 3
How it works
  • You name the price you want to pay for a product.
  • We send your offer to a network of Certified Retailers.
  • If the retailer likes your offer, you get that price for the product.
Greentoe Guarantee
  • All Products are New and from Certified Retailers
  • 30 day return policy
  • Free Shipping
    No Additional Fees

Name your price


Lowest Price Online: $169.95


Your Chances of Success
lowest price online $169.95
average price online $169.95

Your chances of success

Online Prices
We have done the shopping for you! Here is a list of the lowest prices currently found online. Beat those prices with Greentoe!
Enter your zip code to see how much we will be saving you!
Showing prices for zip code 94103 change
Retailer Base Price Tax Shipping Total
Adorama $169.95 $0.00 $0.00 $169.95
**Pricing is for informational purposes. Not all retailers have direct relationship with Greentoe.


Dimensions (dxl) Approx. 2.5 x 0.36" (63.50 x 9.14 mm)
Filter thread Front: 27 mm
Weight 1.8 oz (51 g)


Focal length 61 mm
Comparable APS-C Focal Length: 40 mm
Aperture Maximum: f/2.8
Minimum: f/22
Format compatibility Pentax Digital (APS-C)
Groups/elements 4/5
Diaphragm blades 9
Minimum focus distance 15.72" (39.93 cm)
Magnification 0.13x
Angle of view 39°
Camera mount type Pentax K


Autofocus Yes
Image stabilization No
Expert Reviews
28 March 2012

This compact pancake lens, released with the Pentax K-01 camera has a bright maximum aperture of f/2.8 and is currently the thinnest interchangeable fixed focal length lens compatible with an APS-C format camera, being under a centimetre thick.

28 March 2012

Obvious benefits of a pancake lens like this are the compact size and lightweight, but this lens delivers excellent sharpness too. The issues with flare and high CA levels when stopped down may be off-putting to some, but if care is taken to use this lens within its limits, it can deliver excellent...

  • +

    Excellent sharpness from maximum aperture, Thin and lightweight, Good build quality, Vignetting is well-controlled

  • -

    High CA levels towards edges of the frame when stopped down, Loss of contrast and flare when shooting into the light, Rubber lens cap falls off easily

User Reviews
30 August 2016

Super tiny lens; it could justifiably be mistaken for a body cap. Excellent optical quality; takes sharp, vibrant pictures. It feels solid and well made. Professional reviews say it compares well with the slightly larger and much much more expensive 40mm f/2.8 limited and is superior to the much...

14 April 2014

This lens is extremely fun to use for photo or video. The images are extremely crisp and video is very fun and easy with such a short focus ring allowing you to do quick focusing pulling with shallow depth of field. This lens also creates very round bokeh from great aperture blades.

7 May 2012

The lens is brand new and arrived in very good packing. Perfect!

7 May 2012

The field of view is neither wide nor normal, sort of odd ball and this limits is overall applicability. But, it's light on the camera, fast and easy to carry about. Takes time to dismount though because of it's limited space for grip. Overall quality is OK. ....BobE

7 May 2012

Love this lens. It focuses purely on the subject and makes my k-x almost a point and shoot. Really recommend it.

7 May 2012

its a great lens sharp good color but for my hand it was to hard toget on and off. would like to have kept it .if I had an extra body I would have made it a real point and shoot.

7 May 2012

Fast clean clear focus sharp as a tack , bargain for great lens.

7 May 2012

Better than my SMC Pentax 35mm 2.5 AL.

7 May 2012

With this one you can take your K5/II/IIS K3/II on your pocket, everywhere. Could be great to have a 21mm with this size and prize.

7 May 2012

Really an excellent lens that is as good as or better than the DA 35 f2.4 or the DA 50 f1.8. Its incredibly small size makes it easy to take along just for fun, and hence it get used more often. The only drawback is the lens cap which I fear could be easily lost getting knocked off.

Product Highlights
  • For Pentax K-01 Mirrorless Camera
  • 60mm Focal Length (35mm Equivalent)
  • Low Profile Design is 0.36" Thick
  • Short 15.72" Minimum Focusing Distance
  • Pentax KAF Mount
  • Aesthetic Design by Marc Newson
Average Expert Score
Average User Score
In The Box
  • Pentax DA 40mm f/2.8 XS Lens
  • O-LC27 27mm Lens Cap
  • Rear Lens Cap (B) for Bayonet Mount Lenses
  • Limited 1-Year Warranty
Still Have Questions?
We can help via Live Chat, Email or you can call us 1-888-840-0464


Please log in or sign up to continue


Validating Credit Card...

It will not be processed until the offer is accepted by a merchant.

Notifying Retailers...

Notifying our merchants and checking to see if they accept this offer.

Offer Submitted!

3-digit code in the back of your credit card