Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Canon Lenses

Reply
 
Thread Tools Search this Thread
Old Apr 4, 2005, 10:41 AM   #1
Senior Member
 
aladyforty's Avatar
 
Join Date: Jan 2004
Posts: 6,964
Default

My problem is buy this new plastic thing 360 australian dollars



OR

Buy this one like this second hand (older style metal mount)in mint condition for between 200 and 300 aust dollars




aladyforty is offline   Reply With Quote
Sponsored Links
Old Apr 4, 2005, 10:34 PM   #2
Senior Member
 
Join Date: Sep 2003
Location: Dallas, Texas USA
Posts: 6,520
Default

No-brainer here. Buy the used one. The new one says "Ultrasonic", but what is, is Micro USM, which isn't that great. The old one (ALL 28-105 f3.5-4.5 versions) use the metal mount. The key here is the maximum f-stop range- the good ones are f3.5-4.5- every one of those are the better built versions and they are still available new. The 28-105's that are f4-5.6 lenses are cheap, all plastic affairs and come automatically in the various "Kit" versions of the Elan 7 because they are so cheap. The "Real" USM motors, the very best ring USM motors, are mounted on the EF lenses with the gold bands around the lens barrel. AF performance in lenses that utilize the very best ring USM is spectacular. They AF in virtual silence and just literally jump into focus. The f4-5.6 versions crawl into focus when you compare the two and the build quality is quite inferior.
Greg Chappell is offline   Reply With Quote
Old Apr 4, 2005, 10:40 PM   #3
Senior Member
 
aladyforty's Avatar
 
Join Date: Jan 2004
Posts: 6,964
Default

Thanks, Im bidding on one on Ebay through a guy Ive got nice condition lenses through before. Im not keen on any of the plastic new lenses Ive looked at. The main selling point I see for them is the light weight, but they look cheap and nasty to me. Thanks for the info regarding the different kinds of USM, I never knew that there was a difference.
aladyforty is offline   Reply With Quote
Old Apr 4, 2005, 11:20 PM   #4
Senior Member
 
Join Date: Sep 2003
Location: Dallas, Texas USA
Posts: 6,520
Default

That's Canon's marketing strategy- to sell those micro USM lenses as "USM". Many users do not know the difference and Canon uses that to sell a lot of junk. They almost never use the term "Micro USM", and where they do it's just barely skimmed over.

Canon is not alone in doing this kind of thing. Today Nikon cashes in on the "ED" moniker. Used to if you bought an 'ED" Nikkor it was not only superior optically, it was also a heavy duty, pro lens. Today they sell as much plastic junk with that term inscribed on it as they do nice optics.
Greg Chappell is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 12:47 AM.