mato je napisal/-a:Big A je napisal/-a:DA* 200/2,8 je odlična reč. Garantirano pokriva FF, enako ostra od F2,8 naprej in od roba do roba, tehta približno enako kot DA* 50-135 (800g), glede na kvaliteto je cena ugodna.
Glede pokrivanja FF pa si prvi, ki ve, kako je s tem.
"The Pentax SMCP-DA* 200mm f/2.8 ED (IF) SDM Lens is a high-quality telephoto lens that is designed for exclusive use with Pentax digital SLR cameras. It offers a focal length that is equivalent (in 35mm format) to 300mm. This wide coverage is ideal for a variety of telephoto applications, including portraiture, sports and scenery.
Pentax DA* (DA-Star) zoom lenses come equipped with the SDM System, which assures smoother, quieter auto-focusing operation by using a built-in supersonic motor. When mounted on the K10D digital SLR camera body, the focus mode is automatically switched to SDM-assisted auto-focusing. When mounted on older Pentax digital SLR camera bodies, the conventional autofocus mode using a camera-mounted motor is selected.
Like all Pentax lenses, this lens is treated with smc coating for maximum light transmission, sharp definition, and high contrast images. In addition, SP (Super Protective) coating made of a special fluoride compound has been applied to the front surface of the lens through the use of a unique evaporation process. As a result, the lens offers excellent water- and oil-repellent performance and makes for easier cleaning should the lens be accidentally smeared with fingerprints or cosmetics.
Note: Not compatible with "full-frame" (35mm size) cameras
Designed for Digital SLRs
The image circle in DA-series lenses is designed to perfectly match the 23.5mm x 15.7mm size of the CCD used in Pentax digital SLRs to optimize camera performance. This design also contributes to a drastic reduction in size, weight and production cost, compared to 35mm-format counterparts with similar specifications. "
Vem, da to piše v uradnih objavah.
Ampak nisem prvi, ki trdi, da DA*200/f2,8 pokriva FF. Ta trditev ni nedokazana za razliko od nekaterih drugih trditev. Zlahka dokažem.
1. DA* 200/f2,8 je po optični formuli, dimenzijah in teži enaka objektivu FA* 200/f2,8. FA* pa je objektiv, ki 100% pokriva FF.
http://www.pentaxforums.com/lensreviews ... -Lens.html http://www.pentaxforums.com/lensreviews ... -Lens.html 2. Treba si je ogledati tudi precej znano temo na bratskem forumu o objektivih, ki pokrivajo FF:
http://www.pentaxforums.com/forums/10-p ... hread.html Tu je DA* 200/f2,8 označena s +++. Kar pomeni, da so s testiranjem ugotovili, da ta objektiv popolnoma pokriva FF.
3. Na isti temi imaš na tudi sliko, posneto za DA* 200/f2,8, posneto pri blendi 2,8 na FF aparatu..
http://www.pentaxforums.com/forums/10-p ... post470261 Na tej sliki ne vidim prav nobenea vinjetiranja...
PS: menim, da DA* 200/f2,8 SDM spada med tiste objektive, ki nam ga druge znamke lahko zavidajo.