Promaster 18-200mm and Tamron 18-200mm

Started Jan 4, 2010 | Discussions thread
johnnyz86
Contributing MemberPosts: 956Gear list
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Re: Promaster 18-200mm and Tamron 18-200mm
In reply to MightyMike, Jan 4, 2010

Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro Zoom Lens for Pentax Digital SLR Cameras

http://www.amazon.com/Tamron-AF-18-200mm-Aspherical-Pentax/dp/B0007WK8NK/ref=sr_1_1?ie=UTF8&qid=1262621831&sr=8-1-fkmr0

Specifications

  • Focal length: 18-200mm

  • Maximum aperture: f/3.5-6.3

  • Lens construction: 15 elements in 13 groups

  • Angle of view: 75 to 7 degrees

  • Type of zooming: Rotation

  • Diaphragm blades: 7

  • Minimum aperture: f/22

  • Minimum focusing distance: 17.7 inches

  • Macro magnification ratio: 1:3.7 (at f=200mm)

  • Filter size: 62mm

  • Corresponding mounts: Pentax

  • Lens hood: Yes, flower shaped

  • Dimensions: 2.9 inches in diameter and 3.3 inches long

  • Weight: 14 ounces

  • Warranty: 6 years

PROMASTER ®
18-200mm Digital XR EDO Aspherical Auto Focus Zoom Lens
http://www.promaster.com/products/products.asp?product=AF18200

Specifications:

• Enhanced Digital Optic Design
• Lens Construction: 15 Elements in 13 Groups
• Lens Coating: Multicoated
• Angle of View: 75-7°
• Minimum Aperture: f/22
• Minimum Focusing Distance: 17.7 in (0.45m)
• Maximum Magnification: 1:3.7 (at 200mm)
• Zooming System: Rotary
• Weight: 14 oz.
• Diameter x Length: 73.8mm x 83.7mm
• Filter Size: 62mm
• Bayonet lens hood included
• Lifetime Warranty

Sigma 18-200mm F3.5-6.3 DC

Lens Construction

http://www.sigmaphoto.com/lenses/lenses_all_details.asp?id=3302&navigator=6
15 Elements in 13 Groups
Angle of View 69.3 - 7.1 degrees (Sigma SD format)
Number of Diaphragm Blades 7 Blades
Minimum Aperture F22
Minimum Focusing Distance 45cm / 17.7 in.
Maximum Magnification 1:4.4
Filter Size Diameter 62mm
Lens Hood Petal Hood
Dimensions Diameter 70mm X Length 78.1mm
2.8 in. x 3.1 in.
Weight 405g / 14.4 oz.

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Tamron SP AF 70-200mm F/2.8 Di LD (IF) MACRO Pentax smc DA 70mm F2.4 AL Limited +3 more
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