is this a usm or non usm lens?
1731713
no it is not. take a look at all the Canon brand lens that are USM http://www.slrphotographyguide.com/camera/canon-digital-slr/usm-lens.shtml
1434068
Thank you for your interest in our item. In regards to your inquiry, the 55-250mm lens is not the STM version. If you are looking to create a customized package then please contact us directly at 800-991-3350.
1495161
USM means Ultra Sonic Motor which is used when auto focusing. There are many debates about USM vs non-USM. The USM has a micro motor in it that is considered to be very quiet and accurate. Non-USM have a noise making DC motor or are manual focus only. If there is no difference in price, get the USM. You can always switch to manual focus if needed for quiet events like weddings, funerals, church events, etc.
35288
This is due to the 50mm f/1.8 lens having the old style focusing motor, not USM. It is not the lens adapter causing this noise. For lenses like this I recommend manually focusing.
1183536
I have not had a chance to compare both but this sigma is the first non canon lens I have put in my bag. Have 6 different ones and the sigma is a great value. I have not regretted it.
563694
It was USA but I don't remember the warranty details as I returned the lens.
776894
Robert - Only had the lens for a couple of hours - it had quite a bit of distortion at 18mm.. plus the one I received was a "grey" market one.. no us warranty.. and I was not comfortable with that.. so, I returned it. Never used it in the field.. hope this helps..
2283907
The lens description does state that this is a "Nikon USA" lens with the 1+4 extended Warranty andcertificate.
2276691
Don't know -- but I do know it does not stay sharply focused at higher zoom levels after about 1 year of regular use. Never dropped the lens or treated it rough. Just noticed the sharpness disappear after a while. Very disappointed in this lens!
1610952
If the lens is sold by Amazon.com, it will be the USA version. If it's sold on Amazon by a third party, verify with them that it is not grey market.
1939949
50mm f1.4 features Ultra Sonic Motor (USM) which make the lens to focus much faster, quieter and accurate. I have both the 50mm 1.4 and 1.8, and the 1.8 has been kept inside my dry box for a long time after I upgraded to the 1.4. As others said, the f1.4 uses better glass which gives better optic quality, metal EF mounting which is more durable.
1606354
This is found in the lens that does not come with a body only camera. It is a micro 4/3 format camera.
1653637
This is an auxiliary lens (58mm) that connects to another filter or lens mount. Check the size of the camera lens mount, on the camera or in printed specifications. I never use the lens beyond a trial as the optical quality was not what I expected or wanted.
1082451
yes - I called Amazon to verify that before purchasing, and mine did have the USA warranty. You may want to call, just to make sure. Lens is utterly amazing.
2240582
I've been using the 17-85mm IS USM with my cameras for several years - love it. I have not used this lens, but you can find the 17-85 used for several hundred dollars cheaper than the 17-40L and it is a more versatile lens.
935001
Hmmm not exactly sure I know the lens is made in japan. So it's not American made. But I have it and it has been good to me
1260669
USM lenses uses a non motor to focus and it has less vibration. is it worth the difference, perhaps to a professional or a real dedicated photographer. I guess if I had the bucks I'd have many great lenses. The lense you have in question, this one sells for less then $150 in my opinion is not a great lense and has a short life span.