What is the difference between USM and Non- USM?
1481554
In practical terms, there is very little difference except that I believe the USM version was discontinued some time ago. Both lenses are not the best performers. The USM version has an ultrasonic micro-motor for focusing while the non-USM uses a electric conventional motor. Micro-motor USM isn't much faster or quieter while focusing than a conventional motor. This is in contrast to Canon's professional lenses which use a very different type of USM ("ring USM") that focuses very fast and silently. Check out a used Canon 100-300mm (also discontinued) if you want the faster ring USM auto-focus and better optics for a reasonable price.
844068
There shouldn't be a difference. They both come from the same sea, but they come from different companies.
1081845
No. The USA Ver. is a direct localization of the Jap Ver., so there is no difference in content, aside form the logo change from Rockman X (Jap) to Mega Man X (USA).
1117869
Yes they are different. They are thicker, have less dexterity and have insulation.
1565241
The non-macro version is the older model of this lens and uses 72mm filters. The macro version is the new and improved version, uses 62mm filters and is manufactured somewhat differently. I believe the new macro version is supposed to be a bit smaller overall and lighter than the older version.
1825102
The "us" indicates that the computer is sold for the United States market. The "nr" is for a different country.
646434
I have no idea what the difference is. I purchased Finishing Touch as a gift (not for myself) and I have no idea what NoNo does.Sorry I couldn't be more help to you.I will sat that the person who received Finishing Touch is very happy with it and has had no problems with using it.
2024400
Not exactly.. This is an article on the differences: answers.yahoo.com/question/index?qid=20070712085847AAi3pf9
2059580
A co-worker had the earlier model, but based on the description, I purchased this one. The differences are minor but significant enough for me - 1) Slightly better image, 2) More robust built-in stand, 3) Nomex carrying sleeve is included (older model did not). Both models are light in weight and auto-switch from landscape to portrait and back depending on orientation.
862866
USM stands for Ultra Sonic Motor, which means that it's silent because there are magnets in the lens instead of a motor to focus.This is Canon's line of fast and silent focusing lenses. & DC stands for defocus control. This gives you variable bokeh - you can twist a ring to change the appearance of the out of focus areas (without altering the sharpness of the in focus area.)
76798
As far as I know, the USM cannot process huge data. So, it is for flash drives only.
1635531
The UST25 looks different from the US25 (one is silver. One black). But also the design is different. LED is in a diff spot. But specks for the 2 look alike. I have the US25 model and have no complaints. And it is ~$4 cheaper than the UST25. But specs look identical. Hope this helps!
647296
I don't really know because I never compared those two.But it works fantastic. It's a very good product.
1150213
No difference. One just omits the mm and the other includes it. Same exact time size.
976034
No, I don't know the difference. I bought this one for my son who took it to St. Marten for his scuba diving gear and he loves it!
1035472
This guy gives a great comparison. There are some minor but important differences that may matter to you.https://www.youtube.com/watch?v=BkgR_307OEo
1448762
The difference between the two rulers is that one is U.S. Standard and one is Metric. Our Ring ruler is item B008UX4DS4. Thank you.