Sigma Conversion Lens FT-1201

Sigma Conversion Lens FT-1201

Sigma Conversion Lens FT-1201

B&H # SIAM4900 MFR # AM4900
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Product Highlights

  • Dedicated to dp3 Quattro Digital Camera
  • 1.2x Magnification
  • Converts dp3 Lens to 60mm (90mm Equiv.)
  • Four Elements in Three Groups Design
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Sigma AM4900 overview

  • 1Description

Extending the effective focal length of the Sigma dp3 Quattro's lens by 1.2x, the Conversion Lens FT-1201 brings the 35mm equivalent focal length to 90mm without affecting the f/2.8 maximum aperture setting. Four glass elements in three groups help to maintain image quality and a rear gelatin drop-in filter holder is also incorporated into the seamless design.

1.2x conversion lens effectively extends the dp3's 50mm focal length to 60mm, which is equivalent to 90mm in the 35mm format.
Four elements in three groups design helps to maintain the original image quality.
With the conversion lens in place, the minimum focusing distance is lengthened to 11.6" and the maximum magnification ratio is 1:3.6.
UPC: 085126931315
In the Box
Sigma Conversion Lens FT-1201
  • Front Lens Cap
  • Rear Cap For FT-1201 Conversion Lens
  • Limited 1-Year North and South America Warranty
  • Limited 3-Year USA Extended Warranty
  • Table of Contents
    • 1Description

    Sigma AM4900 specs

    Lens Construction 4 elements in 3 groups
    Magnification 1.2x
    Minimum Focus Distance 11.6" / 29.4 cm (on dp3)
    Maximum Magnification 1:3.6 (on dp3)
    Filter Size Rear drop-in for gelatin filters
    Dimensions 2.8 x 2.2" / 70.0 x 54.9 mm
    Weight 9.7 oz / 275 g
    Packaging Info
    Package Weight 0.9 lb
    Box Dimensions (LxWxH) 4.0 x 3.7 x 3.7"

    Sigma AM4900 reviews

    Conversion Lens FT-1201 is rated 4.7 out of 5 by 3.
    Rated 4 out of 5 by from A useful addition to the dp3 Quattro While the 1.2x increase in focal length is fairly modest, I find 90mm equivalent far more useful for composing landscapes than the dp3's 75mm length. It's all metal and built like a tank, but the downside is it's very heavy. I always try to support the dp3 by the lens when carrying it with the converter because I am concerned about putting additional strain on the lens mount. Overall the optics are of very high quality and the added elements do not appear to affect the image quality in any visible way. A lens hood is not available, and the standard dp3 hood won't fit, but the front element is recessed enough to provide good shade and protection from damage.
    Date published: 2015-10-11
    Rated 5 out of 5 by from Nice 90mm Option Like the other reviewers I prefer the 90mm equiv focal length, and this add on delivers. Because it is glass and metal it is hefty, but balances well on the DP3Q. A couple things: although the instructions say don't mount it on a filter that's attached to the camera lens, I did so without any problems focus issues or loss of IQ. Also, the filter spec that B&H lists is incorrect: there is no drop-in slot at the rear for filters. It takes a 67mm filter or hood or cap at the front end.
    Date published: 2017-09-03
    Rated 5 out of 5 by from Just a little bit closer Portraits and flower photos. Relatively inexpensive when compared to the costs of a 75mm lens and a 90mm lens for my Leicas,or 85mm and 105mm for my Nikons, or 85mm and 100mm lenses for my Canons. I only wish it came with a 67mm lens hood since lens hoods decrease flare, increase contrast, increase saturation, increase apparent resolution and protect the front of the lens, for so little money. So I bought a cheap lens hood which works fine but looks cheap compared to the lens hood available for the 75mm lens on the DP3 Quattro which give superb color renditions and has great resolution. I compared increasing my image from my 75mm (in 135 format) by 20% which would be fine for most images under 16x20 but I am a perfectionist and this camera is capable of 24x36 prints. The difference between the Sigma DP3 and my other DSLRs is almost like the differences between my old Hasselblad and my Leica prints back in my film days.
    Date published: 2015-12-02
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