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<blockquote data-quote="Tezomoy" data-source="post: 276946" data-attributes="member: 22582">Hi in the lens specification it says &quot;Focus Details-Internal&quot;..What does this means..Is this means it has a in built focus motor?? &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; link-http://slrgear.com/reviews/showproduct.php/product/210/cat/31&nbsp;LENS Specification ---&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <table style='width: 100%'><tr><th>Name 
</th><td>Sigma 28-105mm f/3.8-5.6 UC-III Aspherical IF</td></tr><tr><th>Image Circle</th><td>35mm</td></tr><tr><th>Type 
</th><td>Standard Zoom</td></tr><tr><th>Focal Length</th><td>28 - 105mm</td></tr><tr><th>APS Equivalent</th><td>1.5x: 42 - 157.5mm; 1.6x: 44.8 - 168mm</td></tr><tr><th>Max Aperture</th><td>f/3.8 - 5.6</td></tr><tr><th>Min Aperture</th><td>f/22</td></tr><tr><th>Diaphragm Blades</th><td>7</td></tr><tr><th>Lens Construction</th><td>13 elements in 12 groups, including 1 aspherical element</td></tr><tr><th>Diagonal Angle of View 
(Based on image circle)</th><td>75.4 to 23.3 degrees</td></tr><tr><th>Focus Details</th><td>Internal</td></tr><tr><th>Front Element Rotation</th><td>No</td></tr><tr><th>Zoom System</th><td>Rotary</td></tr><tr><th>Closest Focus</th><td>50cm / 19.7 in. </td></tr><tr><th>Magnification Ratio</th><td>0.18x / 1:5.6</td></tr><tr><th>Filter Size</th><td>62mm</td></tr><tr><th>Dimensions 
(Length x Diameter)</th><td>72.5mm x 71mm /&nbsp; 2.9 in. x 2.8 in.</td></tr><tr><th>Weight</th><td>275g / 9.7 oz</td></tr><tr><th>Notes</th><td>Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax</td></tr><tr><th>Typical Online Price</th><td>US$129.99</td></tr></table></blockquote>

[QUOTE="Tezomoy, post: 276946, member: 22582"] Hi in the lens specification it says "Focus Details-Internal"..What does this means..Is this means it has a in built focus motor?? link-http://slrgear.com/reviews/showproduct.php/product/210/cat/31 LENS Specification --- [TABLE="class: specstable"] [TR="class: altrow"] [TH]Name [/TH] [TD]Sigma 28-105mm f/3.8-5.6 UC-III Aspherical IF[/TD] [/TR] [TR] [TH]Image Circle[/TH] [TD]35mm[/TD] [/TR] [TR="class: altrow"] [TH]Type [/TH] [TD]Standard Zoom[/TD] [/TR] [TR] [TH]Focal Length[/TH] [TD]28 - 105mm[/TD] [/TR] [TR="class: altrow"] [TH]APS Equivalent[/TH] [TD]1.5x: 42 - 157.5mm; 1.6x: 44.8 - 168mm[/TD] [/TR] [TR] [TH]Max Aperture[/TH] [TD]f/3.8 - 5.6[/TD] [/TR] [TR="class: altrow"] [TH]Min Aperture[/TH] [TD]f/22[/TD] [/TR] [TR] [TH]Diaphragm Blades[/TH] [TD]7[/TD] [/TR] [TR="class: altrow"] [TH]Lens Construction[/TH] [TD]13 elements in 12 groups, including 1 aspherical element[/TD] [/TR] [TR] [TH]Diagonal Angle of View (Based on image circle)[/TH] [TD]75.4 to 23.3 degrees[/TD] [/TR] [TR="class: altrow"] [TH]Focus Details[/TH] [TD]Internal[/TD] [/TR] [TR] [TH]Front Element Rotation[/TH] [TD]No[/TD] [/TR] [TR="class: altrow"] [TH]Zoom System[/TH] [TD]Rotary[/TD] [/TR] [TR] [TH]Closest Focus[/TH] [TD]50cm / 19.7 in. [/TD] [/TR] [TR="class: altrow"] [TH]Magnification Ratio[/TH] [TD]0.18x / 1:5.6[/TD] [/TR] [TR] [TH]Filter Size[/TH] [TD]62mm[/TD] [/TR] [TR="class: altrow"] [TH]Dimensions (Length x Diameter)[/TH] [TD]72.5mm x 71mm / 2.9 in. x 2.8 in.[/TD] [/TR] [TR] [TH]Weight[/TH] [TD]275g / 9.7 oz[/TD] [/TR] [TR="class: altrow"] [TH]Notes[/TH] [TD]Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax[/TD] [/TR] [TR] [TH]Typical Online Price[/TH] [TD]US$129.99[/TD] [/TR] [/TABLE] [/QUOTE]

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