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  2. Triplet lens - Wikipedia

    en.wikipedia.org/wiki/Triplet_lens

    A triplet lens A Steinheil triplet telescope eyepiece. The three lenses may be cemented together, as in the Steinheil triplet (optimized for finite conjugate ratio) or the Hastings triplet (optimized for infinite conjugate ratio). [2] Or a triplet may be designed with three spaced glasses, as in the Cooke triplet. The former has the advantage ...

  3. Voigtlander 90mm F3.5 APO-Lanthar SL II - Wikipedia

    en.wikipedia.org/wiki/Voigtlander_90mm_F3.5_APO...

    The Voigtlander 90mm F3.5 APO-Lanthar SL II is an interchangeable camera lens announced by Voigtlander on February 17, 2010. References

  4. Fujinon XF 90mm F2 R LM WR - Wikipedia

    en.wikipedia.org/wiki/Fujinon_XF_90mm_F2_R_LM_WR

    The Fujinon XF 90mm F2 R LM WR is an interchangeable camera lens announced by Fujifilm on May 18, 2015. [1] References

  5. Schneider Kreuznach - Wikipedia

    en.wikipedia.org/wiki/Schneider_Kreuznach

    A Cooke triplet (3-element, 3-group) design with a minimum aperture of f/22. 35 mm f/4.0 with a minimum aperture of f/22. Lens is the same as Curtagon version, only serial numbers are earlier.

  6. Sony FE 90mm F2.8 Macro G OSS - Wikipedia

    en.wikipedia.org/wiki/Sony_FE_90mm_F2.8_Macro_G_OSS

    The Sony FE 90mm F2.8 Macro G OSS is a full-frame macro prime lens for the Sony E-mount, announced by Sony on 4 March 2015.. As of June 2017, the 90mm Macro lens is one of only 3 E-mount lenses manufactured by Sony that are specifically designed for macro photography, with the others being the Sony FE 50mm F2.8 Macro and Sony E 30mm F3.5 Macro lenses.

  7. Canon EF 28-90mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_28-90mm_lens

    The Canon EF 28–90mm f / 4–5.6 is a full frame SLR zoom lens, also often included as a kit lens with Canon EOS film cameras. The maximum aperture is f / 4 at 28mm, reducing to f / 5.6 at 90mm. When set to 90mm, this will create a moderate amount of background blur for portrait photography.

  8. 35 mm Bessa - Wikipedia

    en.wikipedia.org/wiki/35_mm_Bessa

    It featured manually selectable frames for 35 mm/90 mm, 50 mm, and 75 mm lenses. The body, made of polycarbonate plastics, was not comparable to that of a Leica but was solid enough. All in all it was an inexpensive, all-manual rangefinder with TTL metering at a significantly lower price than a comparably equipped Leica M camera. It was ...

  9. Cooke triplet - Wikipedia

    en.wikipedia.org/wiki/Cooke_triplet

    The Cooke triplet is a photographic lens designed and patented in 1893 by Dennis Taylor who was employed as chief engineer by T. Cooke & Sons of York. It was the first lens system that allowed the elimination of most of the optical distortion or aberration at the outer edge of the image.

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