Sigma 18-50mm f/2.8-4.5 DC OS HSM Zoom For Pentax D-SLRs
The Sigma 18-50mm f/2.8-4.5 DC OS HSM is a lens dedicated to digital SLR cameras with APS-C size image sensors offering a large aperture and Sigma's Optical Stabilization and provides a high level of optical performance. The combination of the large aperture of f/2.8 and anti-shake function makes capturing exceptional photos in low light achievable, and the wide angle is well suited for indoor photography. It offers superior peripheral brightness as well as a compact and lightweight construction. Two SLD (Special Low Dispersion) glass elements and three Aspherical lenses provide excellent correction for all types of aberrations. The Super Multi-Layer Coating reduces flare and ghosting. Designed with inner focusing and inner zooming systems, high image quality is assured throughout the entire zoom range. This lens has a minimum focusing distance of 11.8 inches (30cm) throughout the entire zoom range and a maximum magnification ratio of 1:4.1.
Note! Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras. For Pentax mount, if the camera body does not support HSM, auto focus will not be available.
- Optical Image Stabilization
- Sigma's anti-shake function makes capturing exceptional photos in under most lighting situations achievable.
- HSM Autofocusing for Pentax D-SLR Cameras
- Inner Focus System
- An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood (supplied) plus circular polarizing filters.
- Excellent optical design
- Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of color aberrations. This lens produces an exceptional level of optical performance.
- Reduced Ghosting and Flare
- The super multi-layer lens coating reduces flare and ghost. High image quality is assured throughout the entire zoom range.
- Ideal For Portraits and Snaps
- With a minimum focusing distance of 7.9", and a maximum magnification of 1:3, this large aperture standard zoom lens, with close-up ability, is ideal for portrait and snap shots.
- Compact and Lightweight Lens
- Its design incorporates both glass-mold and hybrid aspherical lens technology which offers a compact and lightweight construction.
Go To
| Performance | |
|---|---|
| Focal Length | 18 - 50 mm |
| Aperture |
Maximum: f/2.8 - 4.5 Minimum: f/22 |
| Camera Mount Type | Pentax K |
| Format Compatibility | Pentax Digital (APS-C) |
| Angle of View | 69.3° - 27.9° |
| Minimum Focus Distance | 11.8" (29.97 cm) |
| Magnification | 0.24x |
| Maximum Reproduction Ratio | 1:4.1 |
| Groups/Elements | 12/16 |
| Diaphragm Blades | 7 |
| Features | |
|---|---|
| Image Stabilization | Yes |
| Autofocus | Yes |
| Tripod Collar | No |
| Physical | |
|---|---|
| Filter Thread | 67 mm |
| Dimensions (DxL) | Approx. 2.91 x 3.49" (7.39 x 8.86 cm) |
| Weight | 13.93 oz (395 g) |
REVIEW SNAPSHOT®
by PowerReviews(based on 5 reviews)
Ratings Distribution
100%
of respondents would recommend this to a friend.
Pros
- Consistent output (3)
- Easily interchangeable (3)
- Fast / accurate auto-focus (3)
- Strong construction (3)
Cons
Best Uses
- Was this a gift?:
- No (4)
REVIEWS
Reviewed by 5 customers
Sort by
Displaying reviews 1-5
Pros
- Consistent Output
- Easily Interchangeable
- Fast / accurate auto-focus
- Strong Construction
Cons
Best Uses
- Indoors/Low Light
- Night Photography
- Weddings/Events
Comments about Sigma 18-50mm f/2.8-4.5 DC OS HSM Zoom For Pentax D-SLRs:
This agreat product with that price
- Was this a gift?:
- No
Pros
- Consistent Output
- Durable
- Easily Interchangeable
- Fast / accurate auto-focus
- Lightweight
- Nice Bokeh
- Rugged
- Strong Construction
Cons
Best Uses
- Indoors/Low Light
- Landscape/Scenery
- Night Photography
- Weddings/Events
Comments about Sigma 18-50mm f/2.8-4.5 DC OS HSM Zoom For Pentax D-SLRs:
Will use in small events / family / portraits photos.
Its VERY QUIET, not heavy.
Overall, will use in small events / family photos and portrait. No Complaints.
- Was this a gift?:
- No
Pros
- Inner Focusing
- Pretty Good Bokeh
- Quiet focus
Cons
- Expected HSM to be faster
Best Uses
- Walk around lens
Comments about Sigma 18-50mm f/2.8-4.5 DC OS HSM Zoom For Pentax D-SLRs:
I find the lens pretty sharp wide open at f/2.8, I had the DC Macro Non-HSM a while back and its actually a bit sharper than it. I like the fact that lens does not extend when you change focal length.
Due to the HSM it is very quiet as you expect, but I did not find the focusing to be that much faster than the screwdrive mechanism type lens. I also did not find that much of a difference between the OS and the body SR. Overall I find the lens a good replacement for the kit lens and a good deal for the price.
The lens does not have the red dot on the back to use for reference when mounting to the body, but you can use the white dot for focal length as a a reference point when mounting it to the body.
Obviously one wishes it had a max aperture of f/2.8 throughout the range, but you can't complain for the price, also you can push the K-5 ISO quite a bit so its no problem in terms of shutter speed.
- Was this a gift?:
- No
Pros
- Consistent Output
- Durable
- Easily Interchangeable
- Fast / accurate auto-focus
- Rugged
- Strong Construction
Cons
- Tough To Attach
Best Uses
- Landscape/Scenery
- Sports/Action
- Wildlife Photos
Comments about Sigma 18-50mm f/2.8-4.5 DC OS HSM Zoom For Pentax D-SLRs:
I wondered why my digital camera was yielding pictures of average sharpness. To get more reach at sports events, I purchased a 300mm sigma lens to replace the 200 mm kit lens from pentax. I immediately noticed an improvement. So I replaced my other kit lens with the above sigma lens. I now get the sharpness that the camera should deliver. Sigma lens is a good choice!!
- Was this a gift?:
- No
Pros
- Accurate focus
- Fast Focus
- Quiet Focus
Cons
- F28 disappears quickly
Best Uses
- Good city walking lens
Comments about Sigma 18-50mm f/2.8-4.5 DC OS HSM Zoom For Pentax D-SLRs:
This is a solid lens. I'm not 100% convinced the OS in this lens is an improvement over the body image stabilization, but it seems to be roughly equivalent.
Focus is fast and accurate. F/2.8 goes away by ~20mm but a significant improvement over the Pentax 18-55mm kit lens.
I am glad to have made this purchase.
Displaying reviews 1-5
Filters & Filter Kits
- Price: $12.49
- Price: $34.95
Hoods & Covers
- Price: $39.95
Cases & Wraps
-
- Original: $11.99
- Save: $1.20
- Price: $10.79
Protective Wraps & Mats
- Price: $11.95
What's in the Box
- Petal-Type Lens Hood
- 3-Year USA Warranty
Why Shop at B&H
Make your online shopping trip personal with our online Live Chat representatives. You can easily reach an in-house expert while browsing our site for your shopping needs. We have the most highly-trained staff in the industry who are pros in their fields, and their professional expertise will help you get the most from your purchase.
Place your domestic order with us for shipment via UPS, FedEx Economy, or FedEx Priority by 4 PM ET Monday through Thursday or 11 AM ET Friday and your order will be shipped that day. Visit our Shipping Delivery Times page for further details. Delivery times are subject to payment verification.
We appreciate your purchase from us, and we understand that sometimes the products you buy don’t turn out to be the right choice for you. We guarantee your peace of mind with our 30-day return policy. With no standard restocking fee and few restrictions, you’ll enjoy a return process as easy as shopping with us. Please visit our Return Policy page for further details.
We’ve made iPhone and Android mobile apps available for your service and shopping convenience. Use filtered search to find and purchase almost any item we sell and ship worldwide. Download product manuals and guides for many popular items. See high-resolution product images in close-up detail. Manage wishlists and view order history. Visit our Mobile Apps page to download.
See sample Newsletter
Help
Company Information
B&H Resources
