APO VS NON APO LENSES

Discussion in 'Photography Talk' started by wiseowl, Dec 21, 2013.

  1. ARMANDII

    ARMANDII Low Flying Administrator Staff Member

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    It's an excellent lens, Woo, and I'm pretty sure you'll get some more great pics with it.

    Lens Summary
    Brand: Tamron
    Also Known As: Tamron 70-300mm f/4-5.6 VC
    Lens Type: Zoom Lens
    Format: Full Frame / FX
    Focus: Autofocus
    Lens Mount: Canon EF, Nikon F, Pentax KAF, Sony Alpha
    Release Date: 09/10/2010
    MSRP Price: $515.98 (Check Current Price)
    Made in: Japan
    Infrared Rating: Good
    Production Status: In Production
    Lens Description: In the pursuit to achieve the most outstanding image resolution in the 70-300mm class, Tamron’s Anniversary lens - the SP AF70-300mm F4-5.6 Di VC USD - utilizes an advanced optical design that features an LD (Low Dispersion) and an XLD (Extra Low Dispersion) lens element made from specialized materials that prevent chromatic aberration. As a result, the SP AF70-300mm F4-5.6 Di VC USD (Model A005) boasts sharper contrast and greater descriptive performance than all others in its class. In addition, it is the first Tamron lens sporting a USD (Ultra Silent Drive), Tamron’s very own auto-focus drive mechanism This USD mechanism delivers fast, making it a perfect telephoto zoom choice for photographing sports, racing, or other fast-moving subjects. The lens also boasts Tamron’s proprietary VC (Vibration Compensation) image stabilization to assist in handheld photography, not only at long focal length ranges where blurring is common, but also under low-lit conditions, dramatically enhancing photographic freedom. This combination of best in class image resolution, Ultra Silent Drive and Vibration Compensation is a new achievement of Tamron technology culminating in the production of a premium 70-300mm lens.
     
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    • wiseowl

      wiseowl FRIENDLY ADMIN Staff Member

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      Thank you everyone for all your kind support and lovely comments,they are very much appreciated my friends:ThankYou::)
       
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      • Scrungee

        Scrungee Well known for it

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        I'm confused - did it go back down again or were you bidding on 2 lenses and won the 2nd one which was cheaper (and sounds far more like a reasonable price)?
         
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        • ARMANDII

          ARMANDII Low Flying Administrator Staff Member

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          :heehee:
           
        • Freddy

          Freddy Miserable git, well known for it

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          Hiya.

          Just out of interest. I seem to recall that when using 35mm film cameras, a 50mm lens equated to (roughly) a ratio of 1:1, therefore a 300mm lens would give 6 times magnification. As I understand it, it's not the same with digital? Something to do with the sensor?
           
        • wiseowl

          wiseowl FRIENDLY ADMIN Staff Member

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          Good evening Scrungee my friend you are easily confused :heehee: yes my friend I was bidding on 3 different lenses at the same time,as I didn't want to put all my lenses in one basket,and there's safety in numbers:lunapic 130165696578242 5:

          But just for you my friend,in case you doubt Woo's integrity:lunapic 130165696578242 5:

          [​IMG]
           
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          • Scrungee

            Scrungee Well known for it

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            I've only done that with 2 and got rather worried when it looked like I was going to win both of them.
             
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            • Freddy

              Freddy Miserable git, well known for it

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              Blimey WOO, what if you'd won all three!:heehee:
               
            • ARMANDII

              ARMANDII Low Flying Administrator Staff Member

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              Yep, Freddy, due to the smaller size of sensors against the full frame [35mm] there is what is called the "crop factor" which means that an lens designed for full frame cameras when used on DSLR's will actually act like a bigger lens. For example my Sigma 150-500mm lens will actually act as though it's around 800mm. My Pentax "legacy" lens which were manufactured for film SLRS will do the same thing.:snork::coffee:
               
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              • ARMANDII

                ARMANDII Low Flying Administrator Staff Member

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                You sit there, Freddy, sweating and wanting someone to out bid you while remembering all the bids you lost at the last moment and thinking how ironic it is to be winning all the bids in the last few moments.!!:hate-shocked:
                 
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                • Freddy

                  Freddy Miserable git, well known for it

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                  Does that mean that WOOs new lens will give more than 6x magnification?
                   
                • ARMANDII

                  ARMANDII Low Flying Administrator Staff Member

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                  Well, due to the size of the sensor on Canon cameras, Freddy, the Tamron will have a crop factor of 1.6 against my Pentax K5, which has a larger sensor and has a crop factor of 1.5. So Woo's Tamron should perform around the 450-475mm range when used at the 300mm length:hate-shocked:. As I have said before when operating under those conditions a fast shutter speed and higher ISO speed is best used and also all telephoto lens used at the extreme end can be a bit "soft" but not badly so.:snork:
                   
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                  • wiseowl

                    wiseowl FRIENDLY ADMIN Staff Member

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                    Hi Freddy its a politicians answer again:lunapic 130165696578242 5:
                    If woo had won all three he would have put two of them up for sale:heehee: no seriously I can manage 3 shredded Wheat and 6 bingo cards at once;)
                     
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                    • wiseowl

                      wiseowl FRIENDLY ADMIN Staff Member

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                      Here you are Freddy:)


                      [​IMG]
                       
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                      • ARMANDII

                        ARMANDII Low Flying Administrator Staff Member

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                        That, Sir, has never been in doubt!!:nonofinger::snork:
                         
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