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  1. #1
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,560

    Cool An image quality comparison ...

    It's always fun (yeah ... this is definitely a relative statement) to measure your glass from one lens to another, just to see the quality changes involved. I figure since I was doing all these filter checks ... why not? Yes, I even switched cameras, too.

    Target Distance: 10-feet

    In this case, I went from:

    1) A100 w/ "my standard" grab & go lens (TAMRON AF 18-250mm f/3.5-6.5 XR Di-II LD)
    Name:  135mm 18-250 f63 no filter.jpg
Views: 276
Size:  245.8 KB
    EXIF: 135mm - f/6.3 - 1/125th - ISO-400 - Auto

    2) A700 w/ "my standard" grab & go lens (TAMRON AF 18-250mm f/3.5-6.5 XR Di-II LD)
    Name:  135mm 18-250 f63 no filter A700.jpg
Views: 270
Size:  307.9 KB
    EXIF: 135mm - f/6.3 - 1/125th - ISO-400 - Manual

    3) A100 w/ TAMRON AF 70-300 f/4-5.6 LD
    Name:  135mm 70-300 f4 no filter.jpg
Views: 273
Size:  253.9 KB
    EXIF: 135mm - f/4 - 1/125th - ISO-400 - Auto
    (I have to admit, the chroma on this ... well, it kind of stunned me)

    4) A700 w/ TAMRON AF 70-300 f/4-5.6 LD
    Name:  135mm 70-300 f4 no filter A700.jpg
Views: 297
Size:  309.4 KB
    EXIF: 135mm - f/4 - 1/125th - ISO-400 - Manual

    5) A100 w/ TAMRON AF 28-300 f/3.5-6.3 XR Di LD
    Name:  135mm 28-300 f56 no filter.jpg
Views: 262
Size:  214.1 KB
    EXIF: 135mm - f/5.6 - 1/125th - ISO-400 - Auto

    6) A700 w/ TAMRON AF 28-300 f/3.5-6.3 XR Di LD
    Name:  135mm 28-300 f56 no filter A700.jpg
Views: 259
Size:  225.7 KB
    EXIF: 135mm - f/5.6 - 1/125th - ISO-400 - Auto
    (Sadly, these two are kind of frightening. Focus is tragically soft.)

    7) A700 w/ Tokina AT-X 840 80-400mm f/4.5-5.6
    Name:  135mm 80-400 f45 no filter a100.jpg
Views: 238
Size:  263.6 KB
    EXIF: 135mm - f/4.5 - 1/60th - ISO-400 - Manual

    8) A700 w/ Tokina AT-X 840 80-400mm f/4.5-5.6
    Name:  135mm 80-400 f45 no filter a700.jpg
Views: 236
Size:  303.6 KB
    EXIF: 135mm - f/4.5 - 1/60th - ISO-400 - Manual

    9) A100 w/ the "elitist" SONY CZ 135mm f/1.8 portrait lens (PRIME lens)
    Name:  135-wo-filter a100.jpg
Views: 249
Size:  307.2 KB
    EXIF: 135mm - f/4 - 1/60th - ISO-400 - Manual

    10) A700 w/ the "elitist" SONY CZ 135mm f/1.8 portrait lens (PRIME lens)
    Name:  135-wo-filter a700.jpg
Views: 249
Size:  332.5 KB
    EXIF: 135mm - f/4 - 1/60th - ISO-400 - Manual

    All use pop-up flash and no editing, at all. This is a 100% crop straight JPEG from the camera's sensor. Basically, what you would get just putting the camera up and shooting. A simple comparison.

    How about that 18-250mm, huh? Obviously, it's no PRIME ... but, not too bad for a utility lens. It is the very reason I highly recommend it as the lens to have in your bag.
    Last edited by DonSchap; 08-22-2008 at 03:35 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

  2. #2
    Join Date
    Jun 2008
    Posts
    2,204
    Nice comparison. 18-250 isn't bad at all! I'll take it for my next vacation 28-30 is pretty bad :\ And that's only at 135mm! Maybe it's a bad lens?
    Last edited by dr4gon; 08-22-2008 at 12:14 AM.
    flickr

    Canon 7D - 5D | 550EX - 430EX II - (2) PW FlexTT5 | 24-105 f4L | 70-200 f2.8L IS | 100 f2.8L IS | 50 f1.8 II

  3. #3
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,560
    I haven't really done a lot with the 28-300, as I have only had it for a month, but it is rather disappointing. I may just turn it in for "adjustment" to see if they can save it. It is pretty grim.

    B&H Video wants me to evaluate this lens as a response to the sale of it.

    "Dear Valued Customer,

    We would like to invite you to submit a review for the product(s) you recently purchased. Product reviews are a great way to share your opinions and are a great benefit to other customers.

    For submitting a review you will be entered for a chance to win a $250 B&H Gift Card.

    28-300mm f/3.5-6.3 XR DI f/MINOLTA MAX


    For service inquiries, please call (800) 221-5743 or email customerservice@bhphotovideo.com.

    Thanks again for choosing B&H! We appreciate your feedback and hope to serve you again in the near future.

    The B&H Web Team"


    As a really disappointed customer, I can honestly say, "I do not want to."
    Last edited by DonSchap; 08-22-2008 at 12:52 AM.
    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

  4. #4
    Join Date
    Jun 2008
    Posts
    2,204
    or you can try and get an exchange from them and then give it a potentially better review? But I think their return policy is 14 days from receiving an item.
    flickr

    Canon 7D - 5D | 550EX - 430EX II - (2) PW FlexTT5 | 24-105 f4L | 70-200 f2.8L IS | 100 f2.8L IS | 50 f1.8 II

  5. #5
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
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    9,560
    Exchanging the lens does not imply improving the lens. I could get one back that has the very same problem and then I'm out the shipping costs. No thank you. I bought the lens to save a buck (w/ rebate), so off to the nearby repair depot it will go. That way, I am relatively assured that what I get back will be as good as they can adjust it ... and not take a chance on another QA-failure.

    Believe me, if you buy a lens ... do not send it back if it is bad. Get it fixed. It involves a whole different method of technical inspection ... which is usually much better, overall. Not a production line "CATCH", but a more intimate inspection of the goods.

    But, then again, do as you prefer. I have had very good results from TAMRON in this regard. SONY ... not so much.
    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

  6. #6
    Join Date
    Jun 2008
    Posts
    2,204
    That's true, but if it is truly bad, then it would help a bit, but it certainly is a gamble. I guess I'm thinking in terms of computer hardware.... lol Seems like a repair is probably in your best interest then! I'm glad to hear Tamron's repair is very good.
    flickr

    Canon 7D - 5D | 550EX - 430EX II - (2) PW FlexTT5 | 24-105 f4L | 70-200 f2.8L IS | 100 f2.8L IS | 50 f1.8 II

  7. #7
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
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    That's the best part of the 6-year warranty. Third party manufacturering's QA is going to keep the repair depot busy for quite a while at this rate.

    Something about the focus on the 28-300mm f/3.5-6.3, it's not even a quarter-turn from infinity to 1.6 feet. But then again, it is extremely similar to the same thing on the 18-250mm, so why such a difference? I mean, that doesn't allow for very precise work, but still. Even the wide-angle 17-35mm f/2.8-4 has more than a quarter turn in focus.

    But, then you need to consider ... with the cheap CPL ... compared to the filter being off ... you practically see no change in focal quality. It's tragic in both cases. How would you even know if you had a bad one, as your base measurement sucks, also?

    Well, I'm off to the depot ...

    BTW: Check out the images, again ... I added the Tokina AT-X 840 @ 135mm. Pretty cool, huh? I really do like that lens. Too bad they quit making it.
    Last edited by DonSchap; 08-22-2008 at 11:36 AM.
    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

  8. #8
    Join Date
    Jun 2008
    Posts
    2,204
    It's very nice! Sounds like a nice lens, how much was it when it was for sale? I'm guessing a bit more than the Tamron 70-300/4-5.6.
    flickr

    Canon 7D - 5D | 550EX - 430EX II - (2) PW FlexTT5 | 24-105 f4L | 70-200 f2.8L IS | 100 f2.8L IS | 50 f1.8 II

  9. #9
    Join Date
    Dec 2007
    Posts
    2,562
    The 70-300 is looking real good.
    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/

  10. #10
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
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    Oh yeah, just a bit. $595.

    It is the lightest lens in its class and truly puts out one great image, compared to the 70-300s. I would like to go head-to-head with the relatively new SONY 70-300 G SSM and see just how far off it is. I suspect they may be close.

    Okay ... the 28-300 is off for factory-level adjustment/repair. It will be interesting to repeat the shot and see what happens. They are telling me there is an eight-week turn around for these. We'll see ...
    Last edited by DonSchap; 08-22-2008 at 12:58 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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