mgprasetya's reviews

  • Tamron 28-75mm f/2.8 XR Di LD Aspherical IF SP AF

    6 out of 10 points and not recommended
    Cheap, at f/4 image is usable, but not tack sharp
    image is blurry at f/2.8 especially at 75mm FL

    I used this lens as alternatives for nikon 24-70mm f/2.8. This tamron is a OK to have, but the image quality is not really sharp, especially at 75mm f/2.8. It is blurry. Stop down to f/4, the image is usable. So, to answer my curiosity, (after saving for months), I finally afford to buy Nikon 24-70 mm f/2.8. Then I compared it side by side with this lens. And...the price tells everything. The Nikon blow this lens away. So, After about 8 months of using tamron, I gave up and sold it.

    reviewed April 29th, 2010 (purchased for $360)
  • Sigma 85mm f/1.4 EX DG HSM

    10 out of 10 points and recommended
    very good optics
    back focus. need body with AF micro adjustment

    this lens is sharp wide open.

    at f/1.4, the picture is sharp, on the corner, even on FF camera -D700 .

    i sold my nikon 85mm f/1.4D and got this lens because the nikon only sharp in the middle.

    AF also fast, accurate, and consistent. the only issue i had was back focus. i had to do micro adjustment up to -10 on my camera. other than that, perfect. but, hey...even my nikon 24-70mm f/2.8 had back focus issue as well, and i had to adjust to -15 :-(

    here is the sample @wide open (please click "original" underneath the photo) :

    * i focused on the boy's right eye.
    * the picture is straight out of the camera in jpeg.
    * No editing.
    * in camera sharpness, i set to 6

    reviewed June 4th, 2011 (purchased for $920)