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  1. #1
    Join Date
    Dec 2007
    Posts
    2,562

    Quantaray AF is slipping

    My Quantaray 70-300 lens auto focus is slipping. I had the lens for a few years. The question is send it out to get fixed or buy a new lens. I was hoping to get a macro lens but now I have to replace a broken lens.

    Tamron Zoom Telephoto AF 70-300mm f/4-5.6 Di LD Macro Autofocus Lens for Sony Alpha & Minolta Digital SLR Maxxum $160.00 This is about the same price as a new Quantaray.
    Last edited by sparkie1263; 05-13-2008 at 01:39 PM.
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  2. #2
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,557

    Lightbulb When opportunity knocks ...

    SIGMA/Quantaray lenses have been suffering under the new and higher drive torque provided
    by the SONY camera bodies. In other words, their gears are stripping out.

    TAMRONs and Tokinas have been a lot more durable in that regard. If you do go with a new
    lens, it is my recommendation that you limit to non-SIGMA stuff. Perhaps the newer SIGMA
    lenses are made with better parts ... but believe me, Frank, you are not the first to experience
    this problem and will not be the last.

    I regret hearing about this failure ... but, take the opportunity to investigate other options and
    purchase a really good lens to build your photgraphy around. Personally, I'm really excited
    about the upcoming release of the TAMRON SP AF 70-200mm f/2.8 Di LD for $699.00. It's a
    lot cheaper than the SONY 70-200mm f/2.8 G SSM ($1799.00) ... and pretty much offers the
    same image. That's a good place to start, since you are looking roughly at the same focal
    length.
    Last edited by DonSchap; 05-14-2008 at 05:28 PM.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  3. #3
    Join Date
    Dec 2007
    Posts
    2,562
    Don I am afraid that the 70-200 is a little short. My 70-300 is suffering in some of my shots. I won't get this fixed because they want about $150.00 to fix it. I don't know what to do. I am going to buy a good quality lens. I just bought my macro filters for that lens. That is more money thrown away. Such is life.
    Thanks Frank
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  4. #4
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,557
    Look, you can sell lenses ... don't look at it as a loss.

    The Quantaray was a consumer lens that got ... well, consumed. They are not known for longevity.
    You would be better off considering it history ... no regrets and move forward. Believe me when I say,
    there are many parts I have that probably will never see use again. They had their day.

    Now is the time to consider what you want from the camera, going forward. My Tokina AT-X 840
    80-400mm f/4.5-5.6 has been quite a lens and a terrific alternative to the 70-300mm. Great range,
    relatively lightweight and affordable ... just a little difficult to find one. For the SONY, you need a
    Model I ... not the Model II that is currently being sold. I got this evening moon, in Colorado, with it.

    Name:  moon-crop.jpg
Views: 1805
Size:  196.5 KB

    Still, indoors and snappy focal response, that new TAMRON 70-200mm f/2.8 will be tough to beat.
    Toss a 2x on it and it's still only an f/5.6 and your using a 140-400mm. You can be darn sure
    yours truly be shooting through one in a few more weeks, when the SONY-mount is released.
    Last edited by DonSchap; 05-14-2008 at 05:27 PM.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  5. #5
    Join Date
    Dec 2007
    Posts
    2,562
    I guess you can't go wrong with a f/2.8. It does leave alot of options open. you win let me know when they hit the shelves and I will keep my eyes out also.
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  6. #6
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,557

    Lightbulb Here's a thought ...

    Look ... in the interim ... I've a got an older TAMRON AF 28-200mm f/3.8-5.6
    I could loan you for a bit. The Minimum Focus Distance is 6.9 feet ... but, I have a special "close-up"
    adapter lens that was designed for use on this particular lens, by TAMRON, that allows you to get closer (about
    3-feet).

    Name:  A100-w-28-200+2x-TC+close-up-lens.jpg
Views: 3445
Size:  332.9 KB

    The image above is the 28-200mmm w/ the close-up adapter lens fitted ... and my 2x T/C (that's staying here).

    You reimburse the shipping and I'll send it to ya, Frank. You can use it until TAMRON releases the 70-200mm f/2.8.
    Just remember to remove the close-up adapter lens for normal shooting, unless you really are close.

    There is another lens possibility you may find interesting. JD Katz, a Minolta specializing sales agent, has one on
    ebay.

    35-200mm f/4-5.6 MACRO (<- click on this) ... it has a 62mm filter ring ... which may match those close-up filters you bought.
    Last edited by DonSchap; 05-14-2008 at 05:26 PM.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  7. #7
    Join Date
    Dec 2007
    Posts
    2,562
    That is nice of you Don but I would not think of borrowing anything. I will make due with what I have. I think I might be able to use manual focus. It just threw me for a curve and I couldn't figure out what was going on. It would start to focus and then stop out of focus. When I took the lens off I could hear where it was getting stuck. I want to thank you again for your generous offer.
    Thanks Frank

    Seen this on Ebay
    http://cgi.ebay.com/ws/eBayISAPI.dll...tab%3DWatching
    Last edited by sparkie1263; 05-14-2008 at 04:55 AM.
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  8. #8
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,557

    Red face Focusing in on the problem

    Hey, no problem Frank. We all have rather annoying knowledge that lenses aren't cheap ...
    and unexpected expenses are a really pain in the rump.

    I've had a couple of these lenses for a number of years ... and they've been sitting idle on the film SLRs.

    At the time, I bought them, they were quite revolutionary.

    Good luck, as always, in your pursuit.
    Last edited by DonSchap; 05-14-2008 at 05:23 PM.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  9. #9
    Join Date
    Dec 2007
    Posts
    2,562
    I tried to use the lens without the AF I see why you installed the AF screen. Here area few shots I took without AF.









    Don
    How are those lenses I seen on ebay?
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  10. #10
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,557
    The e-bay offer is fine for $100 ... but remember, it probably is "as is."

    If it works, you are all set. If it has not been dropped, go for it. It's precisely
    what is currently being offered in the stores.
    Last edited by DonSchap; 05-14-2008 at 05:29 PM.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

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