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Here's a brief look at the Tamron 18-250mm F/3.5-6.3 zoom
lens. Scroll down for product shots and macro crop.
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Lens
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Tamron 18-250mm F/3.5-6.3 Di II LD aspherical (IF) macro zoom lens, model #A18-S
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Box contents
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Front and rear caps, hood, and users manual.
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Cost
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$499 retail, discontinued around 2010.
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Build quality
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Good
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Additional information
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Same as Sony 18-250mm, but Tamron costs less money.
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Specifications below
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Optical configuration
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16 elements in 13 groups
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Angle of view
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75°-6° APS-C.
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Aperture
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7 blades, circular
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Full frame and APS-C
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APS-C only, 35mm equivalent, 27-375mm. Will work on full frame A900, but make sure APS-C size capt. is turned on
for best shots.
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Depth of field and focus scales?
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Distance scale only
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Minimum focus, image plane to subject
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18" (457mm)
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Minimum focus, end of lens barrel to subject
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8.3" (211mm)
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Hard stop at infinity focus?
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No
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Length changes when focusing?
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No
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Focus ring turns in AF?
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Yes
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Filter size
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62mm
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Filter ring rotates?
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No
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Distance encoder?
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Yes
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Max magnification
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0.29x
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Min. F/stop
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F/22-40
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Sony teleconverter compatible?
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No
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Length changes when zooming?
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Yes
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Dimensions W x L (my measurements)
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2.9" x 3.3" 74mm x 84mm. Factory specs, not mine.
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Maximum extended length (my measurements)
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6.5" (165mm) approx.
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Weight bare (my scale)
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15.2oz (430g) factory specs, not mine.
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Requisite product shots.
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| Box and contents |
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| Front quarter shot with A100 |
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| Fully extended |
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| Handy zoom lock |
This lens is optically identical to the Sony DT 18-250mm F/3.5-6.3. I tested
both, but decided not to post a completely separate review. I do not own this lens, so I have no updated product shots.
The macro shot below was taken with this lens, and if you'd like to find out about its performance, go here: Sony DT 18-250mm. Macro shot below. Below, check
out the sample and click the picture to see a 100% cropped portion of the full image, (291kb). The sample shot was
taken with the Sony A700 12.2MP camera. The subject is a standard US stamp, 1"x 3/4" or 25.4mm x 19mm. Also, note the macro
shot was taken as close to the subject as focusing allowed; In this case, 8.5" or 216mm, measured from the front
of the lens barrel to the subject. This lens is the same as the Sony 18-250mm, and the macro turned out about the
same too. If you like taking pictures of stamps and test charts at maximum magnification, use F/11-22 or you'll be sorry.
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| Macro shot, 291kb, 100% crop F/16 |
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