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. |
|
| Elérhető bajonett(ek) | Canon EF, Nikon F, Pentax K, Sony / Minolta A |
| Felhasználási terület(ek) | Portré, Közeli, Tájkép, Természet, Épület |
| Kategóriák | Standard zoom |
| Szorzó | 1.5× |
| Stabilizátor | nem |
| Gyújtótávolság | 18 - 250 mm (13,9× zoom) |
| Objektív felépítése | 16 lencsetag 13 csoportban |
| Látószög |
35mm: nincs adat digitális: 75.55-6.38° |
| Lamellák száma | 7 |
| Legnagyobb blende | nagy látószög: f/3,5 tele: f/6,3 |
| Legkisebb blende | nagy látószög: f/22 tele: nincs adat |
| Legkisebb tárgytávolság | 45 cm |
| Nagyítás | 0,29× |
| Szűrőmenet | 62 mm |
| Méret | ∅ 74.4 × 84.3 mm |
| Tömeg | 430 g |
| Megjegyzések |
|
| 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 | DA18 (tartozék) |
| Állvány adapter | nincs adat |
2007. április 30.
I love this lens. I just came back from a week long trip in Europe, where I tested this lens indoors and outdoors, day and night, with all sorts of subjects, and it performed wonderfully. I like to shoot with my Canon 30D handheld, which puts even more demand on the lens. I uploaded a couple of images as examples.
Pros:
- Awesome ZOOM range! It is so liberating to have this flexibility and not have to carry multiple lenses or change lenses outdoors (risk dust on sensor).
- Price is great, compared to what you can get from Canon and others.
- Focus is much quieter and faster than other reviews may indicate.
Cons:
- "Slow" apertures - can't compete with my Canon 50mm f/1.4 for flash-free night and indoor portraits, but given ISO 3200, this lens does well regardless.
- Does not fit some specialized needs such as super-wide-angle or stabilized super-tele-zoom. If you predominantly shoot in those ranges, you should do more research.
Conclusion:
If you want a one-lens solution for daily walking around, travel, etc, this Tamron 18-250 fits the bill wonderfully and I highly recommend it.
2007. június 28.
First I have to say that I rarely take the time to write a review unless the product really impresses me. Second I'm a pro photographer for a Newspaper in TX and I own several canon "L" lenses.
I shoot a Mark II at work and A digital rebel when I go hiking and such. I tried it on the Rebel and I doubt I ever put a different lens on that camera. It is a great little lens. Granted it is slow in low light but that aside, it is wonderful. Very little Vignetting at the wide end and very little Chromatic Aberration. It is really sharp all the way through the zoom range. Highly recommended!!
2007. június 26.
This is a very nice all-in-one travel lens. Before taking it on vacation I carefully compared it to my Canon 17-85mm IS and 70-300mm IS lenses when mounted on a 20D body. The Tamron becomes surprisingly sharp if stopped down one stop from wide open at any focal distance, with equal or better sharpness than the 17-85. From 18-50mm even 1/3 stop down produces excellent sharpness. It closely approaches the sharpness of the Canon 70-300mm lens from 70-135mm but falls behind increasingly at 200m and 250mm. The Tamron is still quite sharp and useful at even 250mm if stopped down but the Canon is just sharper at the same aperture settings.
For the extreme 18-250mm range, the optics are outstanding. Photozone comparisons show this lens to be clearly superior to the earlier Tamron 18-200mm version. In fact, it's sharpness is equal to or better than the expensive Nikon 18-200mm VR lens (Nikon mount only) over all but the 200mm length where it's a close second.
I attached the lens to my 20D and went to Hawaii for two weeks on two islands, shooting hundreds of pictures of landscapes, seascapes, parades, and macro-like closeups. Did I mention that this lens also focuses to about 18" even at 250mm - giving near macro capability. It provided outstanding pictures with eye-poping color and right-on autofocus - all in a lightweight package about the same size as the Canon 17-85mm.
The only downside is the lack of IS, OS or VR (whatever Tamron wants to call it). At the wide end, with good sharpness at even f4, the lack of IS is no problem even in shady or heavily overcast areas. At 250mm, with a need to stop down to f8 or f9, means good natural light or a flash is needed for use without a tripod or other support. Hawaii provided lots of good light so this was not an issue.
2007. május 23.
This lens is the perfect addition to my Digital Rebel XTi. I no longer need that cheapie kit lens that came with the camera, and now I have an excellent zoom that is incredibly powerful. The lens is very sturdy, well built, and locks at the lowest focal length to prevent it from extending on its own. I also found that it's a tad larger than the standard Canon 18-55mm, but not enough to even warrant a discussion. I now use it all the time, however I use my Canon 75-300 IS USM zoom for sports (can't beat that image stabilization). Sometimes it does have trouble focusing in dark areas but no more than the standard 18-55mm. I highly recommend this to anyone with a digital SLR.
2007. augusztus 23.
Although not perfect this will do until the perfect comes along! The ONLY problem that I have found with this lens is that at the extreme telephoto of 225mm-250mm I need to stop down the f/stop a couple of stops to be really sharp. Other than that, it's fantastic!
The macro is so good it makes you want to cry!
I've got 30 yrs professional experience and I knew going in that I would give up some low light and shallow depth of field in this 'do everything' lens, but ya' know what? So far it just hasn't happened!! Add to that the convenience and quality this lens offers and it is just too good to pass up.
I could ramble on about the barrel distortion, pincushioning, and ashprical abberations but they just aren't worth mentioning. Could you get a better lens for $1000? I would hope so! But at this price can you get a better lens? NOPE, NO WAY!
Check out the 5 macro and low light pictures I uploaded above in customer images. I think you'll see why I'm so impressed.
2007. május 14.
I've had this lens for about 3 months and it has been even more satisfactory than expected (and I ordered before it had been reviewed). I wanted a reasonable quality, small, lightweight "walk around" lens, at a reasonable price, and it has been great for me. As an amateur photographer and using a Nikon D50 SLR, my acceptance level may be limited, and someday I may want better glass. But for now I am very very happy. After receiving it and using it for a while, a very positive review appeared in Popular Photography magazine.
2007. augusztus 29.
Previously I owned 18-55 and 55-200 (kit lenses) that came with my Nikon D50. After an year of switching them again an again,I started to look at reasonably price long range ("vacational")lens. The Nikon 18-200 VR looked so good, but price tag was way over my budget. Two weeks ago, I saw review of Tamron 18-250 lens as being #1 zoom lens for D-SLR. I immediately looked at tons of reviews and soon I understood that this is what I was looking for. Immediately two D50's lenses went on e-Bay and I purchased this lens. After one day of continues usage (about 200 photos), I was amazed with color saturation, sharpness, and quality of the lens. I am not a professional photographer but for my purpose (serious home photographer) this lens is simply AWESOME.
UPDATE (3 stars). After 10 days of use, I found this lens has limitations. I was unable to get sharp, clean action photos of my son. Previous 55-200 lens was able to stop the action. As much as about 50/50 of my shots are actions related, I couldn't accept this lens. I sent it back (Buydig.com offer 15 days money back - 10%) for refund. Looking for replacement high zoom lens (more than 200 mm) at reasonable price.
2008. április 01.
Though I do feel the need for VR I get closer to 250mm, this lens does great with my Nikon D70S for ALL occassions. I have no complaints, be it focusing speed or image quality / sharpness. This has become my lens of choice - 5 Stars for the buck. I did have the Nikkor 18-200 VR in mind, but for the price I chose this. I have used SLRs for 15 years and just switched to digital... I never had the option of VR and remember that I had to switch between my 18-70 and 70-300 all the time. My 70-300 had the same problem of shake as I got closer to 300 and this problem is always going to be there with longer focal lengths - Use a tripod for low-light large focal length situations. With this lens, I have no need to switch lenses while I am on the floor - which is a big plus. I use it with my Monopod for event photography and frankly, this does a great job. Note though that this only works well with cameras with APS-C sized Digital SLRs where the CMOS Sensor is close to 24 X 16 mm. THis was the perfect choice for my D70S. A++++++++++++++++.
2008. május 29.
After dropping my camera with my Tamron 18-200 on it I bought the 18-250. Seems to be equally sharp although some reviewers say the 250 is better than the 200. The 200 had bad lens creep which the 250 doesn't have and that alone is a big improvement.
2008. március 11.
This is a great multi-use lens for a hobby/beginner to intermediate photographer. I use this lens to mostly take pictures of my family. It has great range 18-250 (Minus the conversion factor, it's more like 24-300 I think). Have used it a little taking night shots and it works fairly well. Can't beat it for the price. I'm sure a professional could tell you a million things wrong with it. I haven't noticed any image distortion or fish-eye effect on any images.
One thing, I removed the lens hood it came with. It was creating shadows at the bottom of my images.
Great travel lens. If you can only afford to buy one lens right now, this is a great all around lens.