---
product_id: 51368077
title: "Sigma 17-50mm F2.8 EX DC HSM for Pentax Fit"
brand: "sigma"
price: "324005CFA"
currency: XOF
in_stock: false
reviews_count: 8
url: https://www.desertcart.sn/products/51368077-sigma-17-50mm-f2-8-ex-dc-hsm-for-pentax
store_origin: SN
region: Senegal
---

# Fast F2.8 constant aperture FLD + aspherical elements for sharp, vivid images HSM silent & precise autofocus Sigma 17-50mm F2.8 EX DC HSM for Pentax Fit

**Brand:** sigma
**Price:** 324005CFA
**Availability:** ❌ Out of Stock

## Summary

> 📸 Elevate every shot — the pro zoom lens your Pentax deserves!

## Quick Answers

- **What is this?** Sigma 17-50mm F2.8 EX DC HSM for Pentax Fit by sigma
- **How much does it cost?** 324005CFA with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/51368077-sigma-17-50mm-f2-8-ex-dc-hsm-for-pentax)

## Best For

- sigma enthusiasts

## Why This Product

- Trusted sigma brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision HSM Autofocus:** Experience whisper-quiet, lightning-fast focusing that keeps up with your creative flow.
- • **Versatile 17-50mm Zoom Range:** From sweeping landscapes to intimate portraits, cover all your creative bases with one lens.
- • **Compact & Travel-Ready Design:** Lightweight yet robust, this lens fits perfectly in your kit for on-the-go shooting without compromise.
- • **Advanced FLD & Aspherical Optics:** Enjoy razor-sharp images with minimized chromatic aberration and distortion for professional-grade clarity.
- • **Bright & Consistent F2.8 Aperture:** Capture stunning low-light shots and creamy bokeh with a constant wide aperture across the zoom range.

## Overview

The Sigma 17-50mm F2.8 EX DC HSM for Pentax is a high-performance zoom lens designed specifically for APS-C DSLR cameras. Featuring a constant bright F2.8 aperture, advanced FLD low dispersion and aspherical glass elements, and a fast, silent Hyper Sonic Motor autofocus system, it delivers sharp, high-contrast images with beautiful bokeh. Its compact, lightweight build makes it ideal for travel and versatile shooting, covering wide-angle to short telephoto focal lengths (equivalent to 25.5-75mm full-frame). Perfect for professionals and enthusiasts seeking superior image quality and reliable performance in a single lens.

## Description

FLD (“F” Low Dispersion) glass elements FLD glass is the highest level low dispersion glass available with extremely high light transmission. This optical glass has a performance equal to fluorite glass which has a low refractive index and low dispersion compared to current optical glass. It also benefits from high anomalous dispersion. These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass and ensures high definition and high contrast images. This lens incorporates two FLD glass elements, which compensate for colour aberration. In addition, two glass mold elements and one hybrid aspherical lens give excellent correction for field curvature and astigmatism. High definition images are ensured throughout the entire zoom range .Sigma’s unique Large aperture throughout the entire zoom range The large F2.8 aperture allows the use of fast shutter speeds and provides a bright viewfinder image, helping the photographer confirm accurate focusing. It is also ideal for emphasizing the subject by creating a natural, blurred background. .Covering a wide range of focal lengths This lens covers a wide range of focal lengths from 17mm and has an equivalent angle of view of a 25.5-75mm with a 35mm SLR camera. It is ideal for general photography as well as portraits and landscapes. Compact construction The lens has a compact construction with a diameter of 83.5mm, overall length of 91.8mm and weight of 565g. This compact and lightweight construction makes it ideal for travel photography. .Super Multi-Layer Coating and superior peripheral brightness The Super Multi-Layer Coating reduces flare and ghosting as well as providing sharp and high contrast images throughout the entire zoom range. This lens also benefits from superior peripheral brightness and provides sharp and high contrast images even at the maximum apertures. .Fast and quiet AF with internal focusing The lens incorporates HSM (Hyper Sonic motor), ensuring fast and quiet AF. The inner focusing system eliminates front lens ration, making the lens particularly suitable for using the supplied petal-type hood and circular polarising filters. .Close focusing capability This lens has a minimum focusing distance of 28cm throughout the entire zoom range and a maximum magnification ratio of 1:5. .Rounded diaphragm This lens has rounded 7 blade diaphragm which creates an attractive bokeh to the out of focus area of the image.Defocus Control lenses have an image circle that covers APS-C size image sensors. Not for use on digital cameras having image sensors larger than APS-C size or on 35mm or APS film cameras, as vignetting will occur. The angle of view varies depending on which camera the lens is mounted on. To find the 35mm camera-equivalent focal length, multiply the DC lens focal length by the crop factor (digital multiplier) of 1.5, 1.6, or 1.7, depending on the brand of DSLR camera on which the lens will be used. To find which Defocus Control lens is equivalent to a full-frame lens, divide the focal length of the full frame lens by the same crop factor. Sony A and Pentax mounts are not incorporated with OS function.

Review: Expensive but I cannot fault it - I wanted a zoom lens to replace the 18-55 kit lens on my Nikon D5100. I also have the Nikon 35mm 1.8g, but in practice I tended to use the zoom lens more despite the lower image quality. I was looking for great image quality and sharpness with effective stabilisation. The wide constant aperture was a bonus rather than a necessity. This lens was recommended to me by a wedding photographer who chose it instead of a mega-expensive Nikon. I chewed over this for ages - I considered Tamron equivalent both without VC (cheap) and with (not as cheap but not as good?), also the bargain Nikon 50mm 1.8 for image quality. The Sigma is very expensive in absolute terms for an enthusiast like me, but in the end the reviews swayed me. I had some reservations about what I had heard regarding variations between samples, but I decided that I would test the lens extensively on arrival. If there were any shortcomings I would simply use desertcart's excellent return system until I found a good one. After the 30 day mark there would be Sigma's 3 year guarantee to fall back on. I am pleased to report that this has not been necessary - it's a good 'un. The lens arrived in great condition - it is solid and heavy and feels like a professional item should. In use the weight helps dampen vibrations and is a positive thing. It resembles my Sigma 10-20 EX in looks and feel. It takes good images! I have compared it in "blind" tests with my other 2 lenses at 35mm on a tripod. As expected the Sigma wins with the 35mm close behind. In particular the Sigma is much better than the 35mm at controlling CA. Although worthy, the kit lens is beaten hands down, especially towards the edges of the frame. The AF works very well, I tested this and found it was bang on - more accurate than my manual focussing skills. I would give this lens 5 stars if it was less expensive, but I guess you get what you pay for. This lens ticks all the boxes - great build and image quality so far, with stabilisation and useful zoom. I think however that if you can adapt to framing without zoom and have steady hands that a couple of Nikon prime lenses could do some of the job, possibly for less money. The Sigma gives good results at the 17mm end, which I find useful. I am very happy with this lens and would buy it again.
Review: An awesome entry level lens for APC-S cameras - I have been using this lens non-stop for the past 3 years for both photography and film making and I have to say for the price and performance it’s one of the best lenses to use for an APC-S camera body. I was so confident in my initial choice of the lens I bought two, which I use for different functions and it satisfied my needs during those times. Just so you are aware I use a D5500 body along with it, which is known for having 1.5 x crop factor. With that in mind here are the pros and cons. PROs: - It’s versatile as an all-round photography lens. The 17-50mm on APC-S is the focal equivalent to a 24-70 on a full frame camera. At 17mm It is awesome for landscapes/wide angle shots, whilst the 50 mm will behave quite like a 70mm prime for portraits. - Uses a 77mm thread for filter which is common for most fixed aperture lenses - Between the 35-50mm range the lens offers great bokeh for portraits. - Having a fixed f/2.8 aperture is brilliant for low light photography and filmmaking and it feels like you have multiple prime lens. It allows plenty of light onto the camera sensor to keep the ISO & shutter speed at low values. - The auto focus is fast and silent on the D5500 at all focal lengths, and the optical stabilisation is great for capturing sharp images that are stationary or moving. 6. Focusing is pretty accurate on wide to medium shots and is useful for manually focussing at infinity if landscape photos are your niche. 7. The addition of a lock mode is great to eliminate any breathing when in use or aiming down. 8. At f/4-5.6 the images and video produced is super sharp, which is where you should be working from most of the time. CONs: 1. The lens is a lot heavier and bulkier than other kit lens to compensate for the fixed aperture. 2. The build quality takes a hit due to price reducing. Some people might like the finish others won’t. 3. You can feel and hear the internal components move around if you shake the lens and the supplied lens hood can easily fall off. 4. The zoom and focus rings are arranged opposite to normal NIKON lens, which can be jarring to new users. 5. The manual focus range is extremely limited especially in close up shots, so be aware of the minimum distance you can rack focus to whether in manual or auto. 6. At f/2.8 on all focal lengths you can notice the image sharpness gets a bit soft and there is a subtle vignette at the lower focal length range. 7. The focal length zoom is an external rather than internally function which isn’t great for filming unless the camera is station at all times. Considering most people who are looking at this len probably are starting out with either/both the 18-55 Nikon kit lens and Tamron 70-300 VC, this of course is the natural progression to advancing your photography. Along with the NIKON 35 mm and 50mm prime lens this would be among my go to lens if I started again from scratch. As a film maker or vlogger, I will admit it might not tick all the boxes and that’s in part due to the negatives addressed. If you really are on a tight budget by all means go for it, but if you’re going to do it professionally I’d often recommend saving the money and getting the sigma art 18-35mm f1.8 and future proof the investment. Regardless of the negatives I still love this lens as it is overall a good purchase, it’s ideal for travel being an all-around lens and can produce truly stunning images with minor issue being fixable in post. I absolutely would recommend this.

## Features

- Fast, F2.8 constant aperture
- High Speed, HSM autofocus
- FLD and aspherical lens elements
- Compact and lightweight Design
- Designed specifically for use on APS-C digital SLR cameras

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B006IQ3W0U |
| Best Sellers Rank | 96,626 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 1,181 in Camera Lenses |
| Brand | Sigma |
| Brand Name | Sigma |
| Compatible Camera Models | [Pentax K] |
| Compatible Mountings | Pentax Auto 110, Pentax K, Pentax KAF2, Pentax KAF3, Pentax Q |
| Compatible mountings | Pentax Auto 110, Pentax K, Pentax KAF2, Pentax KAF3, Pentax Q |
| Country of Origin | Japan |
| Customer Reviews | 4.3 out of 5 stars 4,649 Reviews |
| Fixed Focal Length | 50 Millimetres |
| Focal length description | 17-50 mm |
| Focus Type | Auto Focus, Stabilized |
| Global Trade Identification Number | 00085126928629 |
| Image Stabilization Type | 4 stops claimed |
| Item Weight | 565 Grams |
| Item height | 8.4 centimetres |
| Lens Coating Description | Super Layer Coating |
| Lens Design | Zoom |
| Lens Mount | Sony E |
| Lens Type | Standard |
| Lens type | Standard |
| Manufacturer | Sigma |
| Maximum Aperture | 2.8 f |
| Maximum Focal Length | 50 Millimeters |
| Maximum focal length | 50 Millimeters |
| Minimum Aperture | 22.0 |
| Minimum Focal Length | 17 Millimeters |
| Minimum focal length | 17 Millimeters |
| Model Name | 17-50 mm F2,8 DC EX HSM |
| Number of Diaphragm Blades | 9 |
| Real Angle Of View | 17 Degrees |
| UPC | 085126928629 |
| Zoom Ratio | 1:2.94 |

## Product Details

- **Brand:** Sigma
- **Focal length description:** 17-50 mm
- **Lens type:** Standard
- **Compatible mountings:** Pentax Auto 110, Pentax K, Pentax KAF2, Pentax KAF3, Pentax Q
- **Maximum focal length:** 50 Millimetres
- **Minimum focal length:** 17 Millimetres
- **Lens design:** Zoom
- **Focus type:** Auto Focus, Stabilized
- **Lens-fixed focal length:** 50 Millimetres
- **Lens coating description:** Super Layer Coating

## Images

![Sigma 17-50mm F2.8 EX DC HSM for Pentax Fit - Image 1](https://m.media-amazon.com/images/I/61Bzy4aDO6L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Expensive but I cannot fault it
*by T***X on 28 March 2013*

I wanted a zoom lens to replace the 18-55 kit lens on my Nikon D5100. I also have the Nikon 35mm 1.8g, but in practice I tended to use the zoom lens more despite the lower image quality. I was looking for great image quality and sharpness with effective stabilisation. The wide constant aperture was a bonus rather than a necessity. This lens was recommended to me by a wedding photographer who chose it instead of a mega-expensive Nikon. I chewed over this for ages - I considered Tamron equivalent both without VC (cheap) and with (not as cheap but not as good?), also the bargain Nikon 50mm 1.8 for image quality. The Sigma is very expensive in absolute terms for an enthusiast like me, but in the end the reviews swayed me. I had some reservations about what I had heard regarding variations between samples, but I decided that I would test the lens extensively on arrival. If there were any shortcomings I would simply use Amazon's excellent return system until I found a good one. After the 30 day mark there would be Sigma's 3 year guarantee to fall back on. I am pleased to report that this has not been necessary - it's a good 'un. The lens arrived in great condition - it is solid and heavy and feels like a professional item should. In use the weight helps dampen vibrations and is a positive thing. It resembles my Sigma 10-20 EX in looks and feel. It takes good images! I have compared it in "blind" tests with my other 2 lenses at 35mm on a tripod. As expected the Sigma wins with the 35mm close behind. In particular the Sigma is much better than the 35mm at controlling CA. Although worthy, the kit lens is beaten hands down, especially towards the edges of the frame. The AF works very well, I tested this and found it was bang on - more accurate than my manual focussing skills. I would give this lens 5 stars if it was less expensive, but I guess you get what you pay for. This lens ticks all the boxes - great build and image quality so far, with stabilisation and useful zoom. I think however that if you can adapt to framing without zoom and have steady hands that a couple of Nikon prime lenses could do some of the job, possibly for less money. The Sigma gives good results at the 17mm end, which I find useful. I am very happy with this lens and would buy it again.

### ⭐⭐⭐⭐⭐ An awesome entry level lens for APC-S cameras
*by R***A on 31 May 2020*

I have been using this lens non-stop for the past 3 years for both photography and film making and I have to say for the price and performance it’s one of the best lenses to use for an APC-S camera body. I was so confident in my initial choice of the lens I bought two, which I use for different functions and it satisfied my needs during those times. Just so you are aware I use a D5500 body along with it, which is known for having 1.5 x crop factor. With that in mind here are the pros and cons. PROs: - It’s versatile as an all-round photography lens. The 17-50mm on APC-S is the focal equivalent to a 24-70 on a full frame camera. At 17mm It is awesome for landscapes/wide angle shots, whilst the 50 mm will behave quite like a 70mm prime for portraits. - Uses a 77mm thread for filter which is common for most fixed aperture lenses - Between the 35-50mm range the lens offers great bokeh for portraits. - Having a fixed f/2.8 aperture is brilliant for low light photography and filmmaking and it feels like you have multiple prime lens. It allows plenty of light onto the camera sensor to keep the ISO & shutter speed at low values. - The auto focus is fast and silent on the D5500 at all focal lengths, and the optical stabilisation is great for capturing sharp images that are stationary or moving. 6. Focusing is pretty accurate on wide to medium shots and is useful for manually focussing at infinity if landscape photos are your niche. 7. The addition of a lock mode is great to eliminate any breathing when in use or aiming down. 8. At f/4-5.6 the images and video produced is super sharp, which is where you should be working from most of the time. CONs: 1. The lens is a lot heavier and bulkier than other kit lens to compensate for the fixed aperture. 2. The build quality takes a hit due to price reducing. Some people might like the finish others won’t. 3. You can feel and hear the internal components move around if you shake the lens and the supplied lens hood can easily fall off. 4. The zoom and focus rings are arranged opposite to normal NIKON lens, which can be jarring to new users. 5. The manual focus range is extremely limited especially in close up shots, so be aware of the minimum distance you can rack focus to whether in manual or auto. 6. At f/2.8 on all focal lengths you can notice the image sharpness gets a bit soft and there is a subtle vignette at the lower focal length range. 7. The focal length zoom is an external rather than internally function which isn’t great for filming unless the camera is station at all times. Considering most people who are looking at this len probably are starting out with either/both the 18-55 Nikon kit lens and Tamron 70-300 VC, this of course is the natural progression to advancing your photography. Along with the NIKON 35 mm and 50mm prime lens this would be among my go to lens if I started again from scratch. As a film maker or vlogger, I will admit it might not tick all the boxes and that’s in part due to the negatives addressed. If you really are on a tight budget by all means go for it, but if you’re going to do it professionally I’d often recommend saving the money and getting the sigma art 18-35mm f1.8 and future proof the investment. Regardless of the negatives I still love this lens as it is overall a good purchase, it’s ideal for travel being an all-around lens and can produce truly stunning images with minor issue being fixable in post. I absolutely would recommend this.

### ⭐⭐⭐⭐ Snags compared to Nikon original lenses
*by S***T on 10 April 2019*

Great lens BUT I found some snags I was not expecting. I use this lens on a Nikon D7200 I love... Sharper than anything comparable I could find (see DXO Labs tests for info). Needle sharp at f3.3 wide angle and f2.8 zoom. Good light transmission makes it great for low light photos. Great value compared to Nikon. Sharpish at f11 so okay for landscapes. Not so keen... Can't switch from auto to manual focus durunh a shot without first switching on manual. If hand accidentally touches focus ring then it hinders auto focusing. Zoom ring works opposite way to Nikon lenses which feels odd. Flare can be a slight problem, more so than with Nikon originals where I find a lens hood unnecessary. Focus tracking of a person walking or running towards the camera works amazingly accurately with Nikon lenses but not with this lens. Perhaps the focus motor is too slow. In bright sunlit high contrast scenes with this lens the camera over exposes by about half to one stop which burns out highlights. That does not happen with original lenses. Overall, I am a tad disappointed but still rate it a great lens for the money. One last thought, the lense I received was a grey import with a 1 year warranty instead of the 3 years Sigma UK offer.

## Frequently Bought Together

- Sigma 17-50mm f/2.8 Ex Dc Hsm Lens for Pentax DSLR Camera
- SanDisk 128GB Extreme PRO SDXC UHS-I Memory Card - C10, U3, V30, 4K UHD, SD Card - SDSDXXD-128G-GN4IN
- Canon Mount Adapter EF-EOS R

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-03-07*