APS-C méretű vetített képAz APS-C méretű képet vetítő objektíveket kimondottan a digitális fényképezőgépekhez fejlesztették, ezért nem használhatók filmes gépeken, vagy olyan digitális fényképezőgépeken, amelyekben az APS-C méretűnél nagyobb érzékelő található. Nem ultrahangos AF-esAz ultrahangos automatikus élességállítással szerelt objektívek általában halkabbak és gyorsabbak, mint a tradicionálisan működő objektívek. Egy vagy több alacsony szórású lencsetag is van benneAz alacsony szórású lencsetagok segítenek csökkenteni a kromatikus aberrációt. Nem stabilizáltA képstabilizátor segít csökkenteni a kéz remegéséből adódó elmosódásokat. A stabilizátor hatása elsősorban nagy gyújtótávolságnál és gyenge megvilágításnál érezhető. A képstabilizátor 1-3 fényértéknyi előnyt biztosít a nem stabilizált objektívekhez képest. Fém bajonettAz olcsóbb objektívek általában műanyag, míg a drágábbak fém bajonettel készülnek. Általában a fém bajonettek tartósabbak, így gyakori objektívcserénék ez a szerencsésebb. Ha egy fényképezőgépet főleg egy objektívvel használunk, akkor a bajonett anyaga nem annyira lényeges. Belső élességállításúA belső élességállítású objektívek mérete az élességállítás során nem változik. A front lencse fixA fix frontlencse az élesség és/vagy a gyújtótávolság állításakor nem fordul el. Ez lehetővé teszi, hogy a fotós szirom alakú napellenzőt használjon. A fix frontlencse megjönnyíti a polarizációs szűrők használatát is. Nincs becsúsztatható szűrőA becsúsztatható szűrőket olyan objektíveknél alkalmazzák, amelyek frontlencséje túl nagy, illetve amelyek látószöge túl nagy ahhoz, hogy hagyományos szűrőket lehessen rájuk tenni. Általában a nagy fényerejű tele, illetve az ultra-nagy látószögű objektíveknél fordul elő ez a megoldás. |
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Ez a zoom objektív kifejezetten APS-C méretű képérzékelővel rendelkező digitális tükörreflexes fényképezőgépekhez készült, és 6,9x-es zoomátfogású biztosít. A képmező a digitális tükörreflexes fényképezőgépek képérzékelőinek méretéhez igazodik. A nagy látószögtől a tele állásig ez a zoom objektív számos különféle témához használható. Mivel nincs szükség objektívcserére, nem áll fenn a veszélye, hogy a fotós elmulasztja a kiváló felvételeket. Az objektív közelpontja minden gyújtótávolság esetén 50 cm, a maximális nagyítási arány pedig 1:5,3. Az élességállító gyűrű távolságskálája kényelmessé és könnyűvé varázsolja a használatot.
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| Elérhető bajonett(ek) | Canon EF, Nikon F, Pentax K, Sony / Minolta A, FourThirds, Sigma |
| Felhasználási terület(ek) | Portré, Tájkép, Épület |
| Kategóriák | Standard zoom, Tele zoom |
| Szorzó | 1.5× |
| Stabilizátor | nem |
| Gyújtótávolság | 18 - 125 mm (6,9× zoom) |
| Objektív felépítése | 15 lencsetag 14 csoportban |
| Látószög |
35mm: nincs adat digitális: 69.3-11.4° |
| Lamellák száma | 7 |
| Legnagyobb blende | nagy látószög: f/3,5 tele: f/5,6 |
| Legkisebb blende | nagy látószög: f/22 tele: nincs adat |
| Legkisebb tárgytávolság | 50 cm |
| Nagyítás | 0,19× |
| Szűrőmenet | 62 mm |
| Méret | ∅ 70 × 77.7 mm |
| Tömeg | 385 g |
| Megjegyzések |
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| AF sebesség | nincs adat |
| AF hang | |
| Belső élességállítás | igen |
| Belső zoom | nincs adat |
| Fix frontlencse | igen |
| Bajonett típusa | fém |
| Időjárásálló | nincs adat |
| Becsúsztatható szűrők | nem |
| Ultrahangos AF | nem |
| APS-C méretű vetített kép | igen |
| Alacsony szórású lencsetag | igen |
| Kemény tok | nincs adat |
| Puha tok | nincs adat |
| Napellenző |
LH680-01 nyomtatható napellenző |
| Állvány adapter | nincs adat | Már nem kapható | igen |
2005. április 08.
This is one of those "it's great BUT ..." reviews. If you don't care about the BUT part, feel free to add a star or two to my rating above.
First, a little background. I'm been an amateur photographer for almost 20 years, 80% of which was spent with SLRs. The 300D is my first digital SLR, but my 5th SLR and my 8th or 9th camera. Currently, I have 4 other lenses for my 300D, all holdovers from when I used my 35mm Canon Elan. The lenses are 50 1.8, 70-210 3.5-4.5, 28-105 3.5-4.5, and an 85 1.8.
Now to the Sigma. The user posts at dpreview's forum and elsewhere say it's pretty sharp IF you have a good sample. Those with bad samples report that this lens tends to front-focus, i.e. the actual focus point is closer than the desired focus point.
There wasn't really any lens in its price range that had the reported sharpness, and if I received a bad sample, I could have Sigma fix it, so why not, right? After all, owners of this lens reported it's sharper than the 300D kit lens, and while not quite as sharp as the Canon 17-85, it's less than 1/2 the price. (I bought mine before the Tamron 18-200 came out.)
When I received my 18-125, I was very happy with the build quality. It's a solid lens with smooth zooming action, and an included removable hood. The lens doesn't have Canon's nice USM's silent and ultra-quick focusing, and the Sigma's focus ring moved when focusing so watch where you leave your fingers, but otherwise no complaints.
But first, I had to make sure my sample didn't have the front-focusing issue. Since the DOF is narrower the closer the focus distance, I did all of my focus/DOF tests in the house and of nearby subjects outdoors. The focus point did seem closer than the desired subject but not closer enough to knock the subject outside the DOF so I accepted it. After all, the pictures were nice and sharp, even wide open, if you don't look too closely at the corners. So I was happy.
Then a month after I got the lens, my wife was in an "adventure race", where I shot hundreds of photos, all with this lens. Most were sharp but the ones of my wife far away (>50m) were noticeably less sharp. Looking more closely, I see that intermediate objects, e.g. the grass, in tele shots with the Sigma appear sharper than my wife. Rats! Does my sample have the front-focusing problem or did my 300D somehow focused on the closer objects?
ASAP after we got home, I took my Sigma out for some controlled tests, along with my 70-210 set at 125mm f5.6. Dozens and dozens of shots later, it's clear my Sigma has the front-focusing problem, but only noticeable with shots of subjects beyond ~50 meters, getting worse and worse with distance.
I pack it up and send it to Sigma's repair center, along with a note detailing the problem and how it only is apparent with tele shots of distant subjects. The lens comes back unrepaired with a sentence on the repair ticket saying the focus and DOF tests passed "ok", and a reference to the included CD. I load it and there are only 2 pics of 2 different test patterns, apparently indoors and only a few meters from the camera.
I call Sigma service, talked to a bunch of people, finally got routed to the head of the repair center, an apparently very busy man who implies it's my camera that's faulty and also that I didn't provide enough info to let them know the problem, i.e. I should have included sample pics. I mention I included a detailed explanation and his reply is, I kid you not, the techs are busy and don't have time to read people's letters!
Getting nowhere with them on the phone, I go home and shoot about 50 photos of a carefully selected scene with the Sigma and my Canon lens above, burned them all to a CD, write a more detailed letter, and send everything to Sigma.
2 weeks later, the lens comes back. Unrepaired. Again. The note says "infinity" focus and DOF tests passed "ok" and to see the pics on the included CD. I look at the 6 photos on the CD - 3 at 18mm and 3 at 125mm - and, unbelievably, the subject was a Sigma sign mere meters from the photographer, with distant trees in the background out of focus, of course.
Clearly we have a disagreement on what "infinity" or even "distant" means.
I will send the lens in a 3rd time but this experience has been so horribly frustrating, I know I will never buy another Sigma lens again.
If you buy this lens, make sure to immediately test the lens with close AND distant subjects as above, and return it immediately to the retailer if you have a bad sample. Good luck!
2004. október 09.
For comparison I've used the Canon 28-135 IS, the Tokina 24-200 (I know, junk), the Canon 28/2.8, Canon 50/1.8, and Canon 18-55 EFS.
The Sigma 18-125 is very good at the wide end, much better color and sharpness than the Canon 18-55, in my opinion (but that's not saying so very much either).
At the telephoto end, there is not as much contrast as you would hope, but the colors and sharpness are pretty good.
I like this lens at the wide angle, and that's what I use it for. I find I don't use telephoto so much any more, and I'm not sure I'd use this lens if I did. The 28-135 with its IS system is much better.
The 28-135 was not wide enough for me, plus it is heavy and large, so the 18-125 is my current walk-around lens. I trade off between it and the 28/2.8.
My next lens will probably be the Sigma 18-50/2.8.
2005. június 06.
I got the lens a little over a week ago and think it is a great lens. A lot of people don't compare apples to apples. You can't compare a lens in this price range / class to one that is hundreds more (or lesser priced either).
Take a look at comaprisons of the Tamron 18-200 and the Sigma 18-200 and judge for yourself. In class and cost it is a very good lens I believe (my opinion).
both are not 'L' lenses / IS lenses / usm / etc. It is much better than a lot of 'kit' lenses and the price is reasonable for most and the pictures I have taken are rich in color and contrast and are not as soft as some say. Almost every review I have read on all lenses except the professional very expensive and very good glass lenses say the reviewed lenses are soft at this range or that range, better at this range or that range.
You need to decide what you really want for carry around (and price obviously). What ranges are good, are you willing to accept some differences at both ends of the lens range to be able to cover all the ranges in one lense. If not you should look at purchasing multiple lenses.
To me it is like a tool when repairing a car, an adjustable wrench will do most jobs for you and do them well, but if you use the exact size box/open end wrench it will probably be much better. If the adjustable is more versitile / acceptable go for it.
Others I have shown my pictures to say the photos are clear and vibrant. I have used Tamron lenses for a long time (over 30 years) and like them, but after reading reviews and seeing examples of pictures on the web I am very pleased and happy that I purchased the Sigma 18-200 lens and would recommend it.
Again these are all MY opinions and everyones eye, needs, and requirements are different.
2005. július 18.
I recently purchased the Canon Digital Rebel 350D and decided not to go with the kit lens, despite its lighter weight. This lens provides a perfect wide-angle to telephoto range for most shooting situations. The focusing mechanism is audible, but it's not a HSM lens, unfortunately. I've have been very happy with the quality of the pictures this lens takes and have no regrets about purchasing it. If you're going to go digital, forget the kit lens and buy something with a little more reach and image quality. It's worth the extra $.
2005. augusztus 10.
The good:
Excellent value. Has a very wide range so I can do wide landscapes, great macro shots, and everything else in between. The lens is also very light and compact. Makes a great walkaround lens. I went on a 3 week trip with this as my only lens, and I was very happy with it. AF is a twitch off, but close to perfect. All pics are super sharp.
The bad:
Noisy, slow autofocus compared to the kit lens as well as the 28-135 IS USM. No full time manual focus, and the switch for AF/MF gets switched to MF a lot when I take it out of my bag. There's also some vignetting around the corners that's noticeable in really bright scenes.
All in all, I still think it's a great value and I definitely recommend it.
2004. szeptember 10.
I bought this lens so that when I travel using my Nikon D100 I could have an all-in-one zoom that would spare me the inconvenience of constantly changing lenses. I have not regretted this purchase, as for most situations the resulting photos are quite satisfactory. However, potential buyers should be aware that any lens that is designed to "do it all" involves compromises.
The lens balances well on an SLR body, is remarkably compact, and is well-made. It's not as solid, however, as an expensive professional-level zoom, so don't drop it! The petal-type lens hood works well to prevent routine flare.
Photos I have taken have been sharp and clear, with only a bit of softness at maximum aperture and at the longest focal lengths. The lens has a few shortcomings, however. In some lighting situations the color cast of digital images seems to be a bit "tan," tending almost toward sepia tones. This can be corrected easily enough in Photoshop (or whatever post-exposure program one uses). Perhaps a bit more annoying is that there is noticeable light falloff in the corners, a phenomenon that is most prominent in photos that include large areas of sky. Again, this can be dealt with in post-processing (mainly through slight cropping), but potential buyers should be aware of this issue.
The best thing about the lens is that it provides adequate performance at focal lengths ranging from standard wide-angle (what would be the equivalent of around 27mm. in a 35mm. camera) to basic telephoto (187 mm. at 35mm.) This makes it quite useful for general, "walkaround" photography, especially when one is traveling. If you want the absolute best in optical performance, however, you might find the lens wanting in some situations.
2006. április 20.
I have a Nikon D50 with the 18-55mm lens. I wanted a lens that would handle most of my requirements without carrying multiple lenses. I considered the Nikon 18-70mm but wanted just a bit more on the telephoto end. The Sigma 18 to 125mm f3.5-5.6 looked like it would do the job nicely. Being a retired news and commercial photographer, I was concerned about the quality of the non-Nikon lens but after reading a number of reviews, decided to give the Sigma a try.
I'm delighted I did! I really like this lens! Colors are crisp and true. The lens feels solid and works very smoothly and, most important, it is needle sharp! There is a small sound when focusing but it's not objectionalble. Focus is quick and accurate even in low light conditions. Unlike the low priced Nikons, the Sigma has a metal mounting flange.
I wouldn't hesitate to buy this lens again. It does more than I expected for a very reasonable price!
2004. augusztus 23.
I bought this lens to use on my Nikon D70. I could not be more pleased with any lens. I compared shots taken with this lens to my Nikon 28-105 and cannot tell any differencs. This is a well made lens and I would reccomend it highly.
2007. február 27.
I bought this lens for those times when all I want is the camera and one lens. There are times when its nice having every accessory known to man packed in a case on your back but who needs all that when attending a party or family picnic. I really like the 18mm end of the range but do see the benefit of reaching out further without a lens change which the 125mm end provides. I have read all the technical analysis most of which confuses me and comes across like splitting hairs. Maybe some of those reviewers can afford to spend hundreds more. It seems like just about every lens suffers from something. Capturing an image that pleases the PHOTOGRAPHER is what is really important and so far I have been very pleased with the results. The lens is being used on a Nikon D50 so I have NOT experienced any of the focus problems the Canon users seem to talk about. As far as focus speed and noise are concerned, I can't tell the difference between this lens and my other Sigma(2) and Nikon(1) lenses. I should mention that I did consider the 18-200mm lens but decided against it because the 18-125mm has been in production longer, doesn't stretch the technical limits as far, and costs about $100 less.
2010. május 29.
As noted by other reviewers, this is a reasonable low cost walkabout lens. It has some barrel distortion, correctable in post processing. I use it primarily on a D70S, which seems to be a good pairing. The combination is balanced and light weight.
On the D70S it's not the sharpest of lenses - a 8x10 print of the entire photo may O.K. but a 100% crop of the Hoedown image I'm attaching will show it's softness. Any enlargement over 8x10 may not be acceptable.
I have a Nikon 18-135 that is sharper; however at the time of this writing the Sigma is $339, and the Nikon is $699. If you have a Nikon mount and a larger budget, I believe the Nikon lens to be the better choice.
For the price, the Sigma is a reasonable lens. It is not particularly noisy when focusing, and finds the focus point fairly quickly.
(Camera lenses are like racing cars - speed costs money, how fast do you want to go?)
Best used as a 'vacation' or 'walkabout' lens. There are better options for landscapes or portraiture or sports (especially indoors sports under ambient lighting) - but if the photographer wants to carry a single lens it's a reasonable choice for the money.
2006. január 14.
Okay, this is a cheap, wide angle almost superzoom lens. That said, it covers a very usable range, produces sharp images, has a solid build, and is light and easy to use. It is a good choice for a travel lens for an APS-C sensor dSLR (not for full frame). The bokeh is a little odd, but I can live with it. The AF can be a bit slow in poorer lighting (but many more expensive lenses suffer from this as well). I've not regretted the purchase. Highly reccomend.
2009. november 09.
I purchased this lens to replace the stock lens that came with my Alpha 300. I photograph pets and would always have to switch between the stock lens and a longer zoom, losing great photo opportunities and time. I was able to use this lens during my entire shoot and my photographs were fantastic. Great price.
2009. április 30.
I recently bought this lens to use on my Sony Alpha A200. it was a replacement for my kit lens. the quality of my copy is exceptional. it takes very sharp pictures, even in low light. i also have yet to experience any of the autofocus problems that other users have had. the autofocus on my copy is fast, smooth, and accurate. it's also quieter than my other lenses, and ALOT quieter than my Sigma 70-300. the internal focus is nice too, as it eliminates rotation of the front element.
the only thing i dont like about this lens is the design of the barrel when you zoom. it's in two separate pieces that slide in and out of each other, and it looks kind of cheap, if you ask me.
obviously this lens isn't a professional grade lens, but with SLD glass, internal focusing, and a price of 150 dollars (with express shipping), this lens is a bargain that can't be beat.
2008. május 20.
This lens is a quick step up or a replacement for the kit lens that accompanies new cameras. Not a great lens, since the barrel turns while focusing making it difficult to use a CPL or graduated ND filter. I would deffinetly reccomend this as a walk around or starter lens and the price can't be beat.
2006. január 27.
(1/27/2006) Rarely have I anticipated a purchase so much. A real general purpose lens that I could use in nearly all situations. You understand. Those times you don't want to lug your bag around and swap lenses. Just a quick shoot. Well, I can tell you that this will not be the lens. Why? Well, the design is flawed. I've now tried two (Thanks Amazon for a liberal return policy) on my Olympus E-500 (great camera) and while composing a shot is just as easy as it with the Zuikos, at full zoom nearly all the shots are dark. Very dark. Even Outside. Even with Flash. It is as if that with the lens fully extended (it nearly doubles in length at full zoom), not enough light can hit the sensor. Man, what a bummer. Now between 18-80 (36-160 for the non 4/3rds crowd), the shots are just fine. Perfect in fact. But I didn't buy an 18-80. I purchased an 18-125, and I want it work as advertised and the sad truth is that it does NOT. So, sad to say, I'm returning the second one. In fairness, I own another Sigma lens (55-200) that works just fine. And Sigma clearly attempts to make an affordable lens (unlike Zuiko) which I find attractive. So bear in mind my review applies to this lens and this lens only. Bad Design. Try again Sigma, try again. I'm still in the market for a good all purpose zoom lens.
NOTE: I've since learned that you can salvage these dark images if you shot in RAW, and use Photoshop Camera Raw to bring the detail back. Doesn't change the design flaw, but again, if you're budget crunched and can handle shooting a RAW, you may be to work around the design flaw using the just described technique. If you shoot to JPEG, the detail is lost and you'll never get the shot back.
2nd Note(3/1/2006): I've since acquired the Zuiko 18-180 lens. It works great. If you are looking for an all purpose zoom, zoom in on this one (pun intended).
2007. március 15.
To say that this lens is superior to the stock Olympus E-500 14-45mm kit lens is an understatement. Fit and finish is excellent. This is one nice piece of glass.
For 4/3rds people looking for a "take-one" lens. This could be it.
I personally like the focal range which makes this lens ideal for nature photography (trees, water, leaves, fungi, flowers, etc...). Forget wildlife with this lens. For that you'll need at least a 200mm tele.
All things considered, this lens represents a true value in the 4/3rds world.
2007. július 05.
Excellent travel lens. Pictures are sharp with excellent color rendition. Good value for the buck.
2007. február 17.
This lens looked like the perfect fit for a walk around lens (whatever the hell that means. Are there crawl around lenses? Or sleep around lenses? Just figured Id use the buzz word) so I decided to pick one up. I have been amazed at the results it produces for just over $200 dollars. I use the lens on my E1 and could not be happier. Sharp as a tack, and great contrast. I noticed that another reviewer was dissapointed with this lens on an E500. Maybe that body uses a different metering system? Maybe his meter was set wrong? Dosent make sense. It aint no Zuiko, but it aint no $900 either. I have the 50-200 too, but this one is much quieter, and produces a generally better picture. I wrote to Sigma and told them that I would gladly pay another C note or two for more quality and speed. Why dont you too? I paid right around $200 dollars for my 50-200 Sigma. The 50-200 Zuiko was around $1200 but I hear it has dropped in price. They can stick them until they hit around 4 bills.