Name: Sigma 18-250mm f/3.5-6.3 DC OS (Optical Stabilizer) HSM Autofocus Aspherical Zoom Lens for Pentax Digital SLR Cameras - USA Warranty
Brand: Sigma
SKU: SG18250OSPX
Price: 429.00 USD
Availability: Discontinued
Rating: 4.2 (151 reviews)

Sigma 18-250mm f/3.5-6.3 DC OS (Optical Stabilizer) HSM Autofocus Aspherical Zoom Lens for Pentax Digital SLR Cameras - USA Warranty

Sigma 18-250mm

Sigma

Sigma 18mm-250mm f/3.5-6.3 DC OS HSM Aspherical Lens f/Pentax DSLRs #880109

Adorama

Photography

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SLR Lenses

Sigma SLR Lenses

Sigma 18-250mm 

Buy: Sigma 18-250mm f/3.5-6.3 DC OS (Optical Stabilizer) HSM Autofocus Aspherical Zoom Lens for Pentax Digital SLR Cameras - USA Warranty

I purchased this for my back-up camera but use it a lot on my main camera as well, even though I have a Nikon 18-200 for that camera.  Sometimes it's nice to have the little extra reach.  My only complaint is that the zoom ring turns the opposite way as my Nikon and other Sigma lenses.  This is disconcerting when you are in a situation that requires fast action and you zoom in when you intended to zoom out. Otherwise, it's a great lens.

Almost perfect

Love this lens. The color in the pictures are great. Just a good all around lens.

I love it !

My lens was exactly what I wanted, no flaws, quick delivery as well!  I have used the lens and it is amazing!  I highly recommend this lens, and Adorama!

My lens was exactly what I wanted

Highly Recommend

More than I expected. fast,quite and sharp.

Nice lens

This is my second lens from Sigma. The quality of the picture is very good and the colors.

Sigma 18 to 250mm

I am enjoying this lens , very clear and sharp pictures

new lens

I submit photos to a stock photo site and thus lens just wasn’t sharp enough for professional standards, I have the 150-600 Sports and it us razor sharp do I felt safe to get thus one. But not so. Chromatic aberration, too.

Returned it

Not being a professional or even avid photographer, I don't feel qualified to rate this lens.  But, after a few trips to the field, I can say that this lens has allowed me to take some of my best DSLR photos yet.  The optical stabilizer is quite impressive (i.e., it works!).  I was ready to sell (or pitch) my Canon T3i, but the Sigma lens has caused me to rethink that plan.

best lens in my bag

This lens consumes power at the fastest rate I have ever experienced.  I have a D500 and the Nikon lenes  I have used with this camera consume much less power.  Also the LCD does not go off after a photograph.  I sent the lens to Sigma, but they found no problem.  I would not buy this lens.

Power Hog

Nice, clear and sharp. Only two issues, first, at 250mm you get some vignetting with the lens cap on. Second, it seems to jump a little in the viewfinder when I try to focus. it's like the connection isn't stable and it did stop focusing altogether at one point until I removed the lens and put it back on again. I do wish it was weather sealed.

Pretty Good Lens

Great replacement for the old 28-300 the was broken. 

Replacement

Nice and sharp.  Focuses very fast.  A little noisier than I expected, but not enough to frighten any creatures away.  Easy to focus even through trees unlike my other 200mm lens.  Quickly focuses on birds in flight, also unlike my other lens  All these photos have been cropped some and no tripod was used.

Very good for the price.

A very ideal lens for beginners or hobbyists. I used this lens on my Canon 70D that I carry in my car at all times for just in case I need a photo, as a photojournalist instead of my pro cameras and lenses. My 70D camera did require AF microadjustment on both the W and T.  The negative side is the construction qualities, the focus ring moves during AF, and eventually the zoom mechanics will break down jamming the lens ability to zoom.  A plastic guide broke. The same happened on a Sigma 17-50 f/2.8—loose turret zoom screws. I have replaced this lens with a Tamron 16-300—costs a bit more but has much better weather protection. better construction properties, and a wider angle and more telephoto.

A budget and light duty all around lens

I love this lens.  It takes beautiful photos.  It is very practical when you are traveling light. The only issue I have is that there is a lot of lens creep.

Great walk around lense.

Amazing quality lens for a Canon T5i. I think I bought it for less than 500 and it is worth 1000.Great lens, and great price. 

Amazing quality lens for a Canon T5i

I love the lens. I have two lenses that do the same distance but it's so much better to have one lense to do it all. I have it on my canon 60D and it works great. I think I even like this brand better than the Canon brand. Would def recommend. 

Love this lens!

I use the 18-250 for general photography ... Nature ... the range from closeup to portrait to scenes and on to telephoto works for me .. using a Pentax K5

Astounding clarity

I know i'm a beginner, but this lens has become my go to lens for what I like to do, sunsets, landscapes.

I know i'm a beginner, but this lens has become my go to lens for what I like to do, sunsets, landscapes

Good quality lens, but the lock is on the opposite side from my last lens and it turns the opposite way to zoom, so it is taking some getting used to.

Good price for a good lens

I had the Tamron 18-270 in the Nikon mount for about 5 days, and returned it.  The zooming was slow, and the image in the viewfinder would jump slightly when the image stabilization activated.  Although the jump didn't affect the photo, it was annoying, and a deal breaker for me.  I now own the Sigma 18-250 and it auto focuses a lot faster, doesn't jump in the viewfinder, and is closer focusing.  Image quality is about equal for these lenses, as many equipment tests have indicated.  This type of lens cannot replace prime lenses for sharp images.  But if you are looking to lighten your load, and accept the lens for what it can and cannot do, its a good, one lens option for traveling light, which is why I purchased this type of lens.

Good all around lens (Nikon mount)

I wanted a walk-around lens for my Pentax K10D that would allow me to take photos of plants, but also give me some zoom range. This fits my needs. I checked to make sure it would work with my camera and it was supposed to. But when it came, it did not autofocus. A bit of web searching revealed I had to update the firmware on the camera. When I did that it worked, although so quietly that at first I wasn't sure. Much quite than the Pentax lenses I have. Not quite fully sharp at extreme close-up and extreme zoom, but a very nice performing lens.

This lens fit perfectly on my camera and gives me the ability to do close-ups and telephoto shots. I like the lock feature to keep the lens from drift focus in when shooting telephoto images. Plus the price was right. My previous lens was a mirror 500mm and was hard to see through because of the fixed f-stop especially at night.

Two lenses in one

As in the heading, I found the lens adequately sharp and with a very advantageous range of focal lengths. My only problem with the lens is that while it is manufactured to fit the Pentax K series  cameras which have been weatherproofed, the lens has not been. This means that although I can use the camera in the rain without worrying (I live on the Oregon Coast), the same can not be said of the lens.

Adequately Sharp - Not weatherproofed

I knew there would be some compromises with this lens and I may have gotten a bad copy ,  but the image quality is terrible even in good light on a sunny day.  I will be returning it for a refund.  I get better images with my old kit lens.

very poor image quality

I use this lens for all types of nature photography. I like the size and weight, also the lock. I do wish it was a bit faster, I find in low light at 250mm focusing can be difficult.  Over all I am very pleased with this lens.

Just the lens I have been looking for.

Haven't used the lens that much so far, but initial impressions are good:
Pros:
Quiet and quick auto focus
Good image quality for landscape photography
Good zoom range for a multi use everyday lens

Cons:
Heavy
Stiff zoom ring/function

So far, really pleased.

I really, really, really wanted to love this lens.  I did a lot of research on my options in this pirce range and the fact it is built is Japan was a major selling point.

THE GOOD: Well built with a sharp and clear visual through my DSLR.  Operated smoothly and had a feel and look of quality.  Quiet.

THE BAD:  I'm only guessing it was not a good match for my Nikon D7100.  Auto-focusing seemed inconsistent and fickle at times on the auto mode.  Exposures seemed unpredicatable in any auto mode.  The color did not match the quality of my Nikon lenses.  One big surprise was that my 200mm Nikon got me just as close to a subject as the 250mm Sigma.  

I really wanted to love it, but after 1000 test shots - I decided to stick with Nikon products and will simply have to save up more cash to do so.

A Fine Lens - But Not For Me

This keeps my lens switching in the past. So far the images are clean, crisp and sharp. Sigma makes fine lenses.

I needed this.

I bought this lens to replace my kit 18-55 and 55-250 canon lenses. 

Pros:
1) Great range. No need to swap lenses on a casual photography outing.
2) Well built and looks like it can take a beating
3) Included lens hood is a bonus.

Cons:
1) Fine focusing at longer zoom is not great. unless you are absolutely still forget taking any images at near maximum zoom without a tripod.
2) Lens is slow to focus especially in low light.