Question about Quantaray 100-300mm F4.5-6.7 Zoom lens for Minolta
Hi ! I have a Canon RebelX S Camera with this lens. It has been
barley used either and they had been sitting in a drawer for a couple
oy years, (with Silica Gel to prevent fungus). When I tried to use it
the Quantaray will not Autofocus. I tried the original Canon Zoom lens
35-80 the Autofocus works fine. The Quantaray lens in Manual focus
works, and in Autofocus tries to move (you can hear the autofus motor)
but barely does. After moving it manually, it has begun to move
somewhat. Is there a way to lubricate or 'exercise' the lens without
opening it up ?
NEVER open it up. You will destroy the dust seals. Have Canon repair it.
Posted on Apr 15, 2017
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Posted on Jan 02, 2017
I have been researching this problem and found there's nothing you can really do. Appararently, the quantaray, being an older lens, wasn't made to work with this latest era of cameras. Though it might work perfectly with your older camera, its technology is outdated as it relates to digital cameras and can't mesh with the latest and greatest. By the way, most of my questions were answered on the Digital Camera Resource page (www.dcresource.com
Posted on Mar 14, 2008
SOURCE: Quantaray 28-200mm Aspherical IF
Quantary Lenses are made by either Sigma or Tamron That lens was usualy made buy sigma. the way to tell is to take it to a camera store that sells 28-200 lenses and hold your lens next to the sigma or tamron. They will look the same just with a different name. one of the main difference's between the store brand quantaray and sigma is that alot of time the metal bearings used in the name brand are replace with plastic ones for the quantaray. I tell you that just so you know why the sigma lenses cost more.
you can also find broken ones on online auction sites and use them for parts.
hope you get it working,
Posted on Jul 02, 2008
Does the lens have an aperture ring? If so, some such lenses also has a 'lock' (a tiny button near the narrowest aperture) enabling it to be used with cameras having CPU contacts. Check if your lens has this.
Posted on Feb 10, 2009
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