Pentax SMCP-DA* 300mm f/4 ED (IF) SDM Autofocus Lens for Digital SLR

Pentax SMCP-DA* 300mm f/4 ED (IF) SDM Autofocus Lens for Digital SLR

Pentax SMCP-DA* 300mm f/4 ED (IF) SDM Autofocus Lens for Digital SLR

B&H # PE3004DA MFR # 21760
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Product Highlights

  • Weather & Dust Resistant

WARNING: Not compatible with "full-frame" (35mm size) cameras.

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Pentax 300mm f/4.0 overview

  • 1Description

The Pentax SMCP-DA* 300mm f/4 ED (IF) SDM Lens is a high-quality telephoto lens that is designed for exclusive use with Pentax digital SLR cameras. It offers a focal length that is equivalent (in 35mm format) to 450mm. This wide coverage is ideal for a variety of telephoto applications, including portraiture, sports and scenery.

Pentax DA* (DA-Star) zoom lenses come equipped with the SDM System, which assures smoother, quieter auto-focusing operation by using a built-in supersonic motor. When mounted on the K10D digital SLR camera body, the focus mode is automatically switched to SDM-assisted auto-focusing. When mounted on older Pentax digital SLR camera bodies, the conventional autofocus mode using a camera-mounted motor is selected.

Like all Pentax lenses, this lens is treated with smc coating for maximum light transmission, sharp definition, and high contrast images. In addition, SP (Super Protective) coating made of a special fluoride compound has been applied to the front surface of the lens through the use of a unique evaporation process. As a result, the lens offers excellent water- and oil-repellent performance and makes for easier cleaning should the lens be accidentally smeared with fingerprints or cosmetics.

Note: Not compatible with "full-frame" (35mm size) cameras

Designed for Digital SLRs
The image circle in DA-series lenses is designed to perfectly match the 23.5mm x 15.7mm size of the CCD used in Pentax digital SLRs to optimize camera performance. This design also contributes to a drastic reduction in size, weight and production cost, compared to 35mm-format counterparts with similar specifications.
DA*-series lenses feature tightly sealed, weather-resistant and dust-resistant construction that enhance durability for use in rain or dusty conditions.
SP Coating
SP (Super Protective) coating made of a special fluoride compound has been applied to the front surface of the lens to offer excellent water- and oil-repellent performance.
Quick-Shift Focus
Quick-Shift Focus System allows to instantly switch the focus mode from AF to manual with a slight twist of the focus ring.
High Optical Quality
Incorporates Extra-low Dispersion (ED) glass lens elements to compensate for chromatic aberration.
UPC: 027075141261
In the Box
Pentax SMCP-DA* 300mm f/4 ED (IF) SDM Autofocus Lens for Digital SLR
  • Front & Rear Lens Caps
  • PH-RBK 77mm Lens Hood for SMCP-DA* 200mm f/2.8 ED (IF) & 300mm f/4 ED (IF) Lens
  • S120-210 Soft Lens Case
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Pentax 300mm f/4.0 specs

    Focal Length 300mm
    Comparable APS-C Focal Length: 450 mm
    Aperture Maximum: f/4
    Minimum: f/32
    Camera Mount Type Pentax K
    Format Compatibility Pentax Digital (APS-C)
    Angle of View 5.4°
    Minimum Focus Distance 4.59' / 1.40 m
    Magnification 0.24x
    Maximum Reproduction Ratio 1:4
    Optical Design 8 Elements in 6 Groups
    Diaphragm Blades 9
    Image Stabilization No
    Autofocus Yes
    Tripod Collar Yes
    Filter Thread 77 mm
    Dimensions (DxL) 3.3 x 7.2" / 8.38 x 18.29 cm
    Weight 2.35 lb / 1.07 kg
    Packaging Info
    Package Weight 3.7 lb
    Box Dimensions (LxWxH) 9.8 x 7.3 x 5.1"

    Pentax 300mm f/4.0 reviews

    SMCP-DA* 300mm f/4 ED (IF) SDM Autofocus Lens for Digital SLR is rated 4.9 out of 5 by 59.
    Rated 5 out of 5 by from Better than I had hoped! I use this lens mostly for nature photography coupled to a K5 camera. Image quality has been excellent. I thought the 60-250 had fantastic sharpness and color rendition and this lens is just as good. I have missed a few shots due to wandering focus and I think a focus limiter would be good but all in all this is the lens that has been on my camera most of the summer and my photography has never looked so good. I have been using Pentax for 30 years and finally I have a system that can go up against just about anything else out there. I would buy this again without reservation.
    Date published: 2012-09-20
    Rated 5 out of 5 by from Bought this lens for IQ I had been using the Sigma 150-500 OS version plus DA*60-250. I am very impress with the DA*60-250, but it seems shorter than 250mm for some reason. The Sigma was a bit heavier and I want to improve the IQ on that. Thru reading positive reviews on the DA*300, I purchased it. It has the same (or better) build quality as my DA*60-250. IQ is superb and it's relatively light weight is very nice. Now I don't need tripod or monopod for BIF. The AF is not super fast and sometimes it does hunt. I wish Pentax will make similar lens for 400mm or 500mm together with an excellent quality 1.4 or 1.5 AF teleconverter.
    Date published: 2012-03-19
    Rated 5 out of 5 by from Tack-sharp This is a high-quality alternative to the $3000+ f/2.8 telephoto lenses. I use it for wildlife - mostly birds - after saving up for a sharp lens fast enough for birds in flight. I bought a used Sigma 100-300mm a year ago with disappointingly softer focus than this Pentax prime lens. I considered the Sigma 150-500mm (Bigma) for about the same price, but I knew I would use it mostly at the long end, so I went for the higher IQ of the 300mm prime. I have a Kenko 1.5x teleconverter that I believe is sharper combo with the 300mm than the Bigma zoom. One complaint: one of the plastic hood bayonet connections broke in shipping, but super-glue seems to be holding well!
    Date published: 2012-02-23
    Rated 5 out of 5 by from Excellent lens for K-1 and full frame in general I had this lens for 9 years now and it never ceases to amaze me. It was excellent on APS sensors, it's just as good on full frame. The AF is reasonably fast and precise and it never needed adjustments on any of my bodies. It is light enough to hand held and with stabilization it can go as low 1/60 sec and produce sharp images. I may complain perhaps about the hood, that wears up quickly against the metal threads, and over the years I dropped it too often and and had to replace it twice. The combo with the DA 1.4X TC is just as good as the lens alone in terms of sharpness and AF (for APS bodies), too bad Pentax is not releasing a TC update for full frame. I would buy this lens again.
    Date published: 2018-06-20
    Rated 5 out of 5 by from 300 mm f/4 fast focus My first shots with this lens were handheld moon photos. The detail is amazing, my family was asking where I found those moon shots and they were surprised when I told them I took them. I have also been shooting wildlife and I am very impressed with the speed to focus, but more so the silence of the motor. If you did not see the image change you may not know it has focused. I was surprised by the size and weight of this lens, it is rather heavy. Thankfully Pentax included the tripod mount attachment to better balance the load.
    Date published: 2014-03-24
    Rated 5 out of 5 by from Excellent Results I bought this lens to use in wildlfe photography and sports. Matched with the new Pentax 1.4 teleconverter, the combination delivers excellent results on my K-3. The SDM auto focus is fast and accurate and the image quality is as good as it gets. I have been using a Sigma 50-500 for bird photography but this lens with the tc produces an equivalent focal length of 420mm, but is light enough for hand-held photos or use on a monopod. It is a very versatile lens.
    Date published: 2014-08-25
    Rated 5 out of 5 by from Great walk around lens This maybe my favorite lens. The image quality paired with the K1 is amazing. For me this is the perfect walking around lens, I own the DA560 also and it can get heavy when on a monopod and on a 5 mile hike around a wildlife refuge near me but the 300 is so small and light. The build quality is solid, auto focus is quite. I've used it for wildlife and air shows and love the performance, would definitely recommend it for anyone interested in either of those types of shooting.
    Date published: 2017-08-05
    Rated 5 out of 5 by from The quality was over my expectations! I would say this lens is reborn of the legendary lens known as Pentax-FA* 300/4.5 for Pentax film cameras. No exaggeration! But now it also has water and mud resistant design and excellent SDM autofocusing system! If necessary you can switch to manual focusing very fast or do manual focusing after the automatic has finished. The lens is sharp, pictures are very clear. SDM focus is fast and very precise. For exmple, took cherry-tree 10-12 meters away and could see veins of its leaves and sharp green cherries on the picture - and all this hand-held! (thanks to K10D stabilization) Rain or drizzle is not a problem - the mount is very tight, lens is sealed and its blend effectively protects the front element. My general impression is that K10D works with SDM lenses better than with previous motor systems. Once again... I was impressed with the results like peoples' faces in the ports of landing aircraft or human's hairs from 50 meters!
    Date published: 2008-07-30
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    Pentax 300mm f/4.0 Q&A

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    Designed for use with:

    • Pentax K-1 II
    • Pentax K-3 II
    • Pentax K-70
    • Pentax K-S2
    • Pentax KP
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