Yoshizen's Blog

Focus Shift (B)

Focus Shift B-1-A09A8857

This is THE pretty girly picture.  But, you may not able to guess what sort 

of the lens I used. —– Well, this was done by the Sigma 28~200mm Zoom,

at 200mm F5.6 with Focus-Shift.

Focus Shift B-2-002

Here, the photo left was a normal shot and the right one was with focus-shift.

(Click and enlarge the photo to see the details = sharp details still there

together with out-of-focus bokeh.)

Focus Shift B-3-001

The photo left was the Canon EFS 18~55mm —– the red and white wires

were connected to its AF Motor.  And the center was the Sigma 18~200mm lens.  

Photo right , the Yellow arrow pointing its AF Motor, and its right on the photo, 

white gears is controlling the size of Iris. (Gear was driven by a stepping motor)

= but by rotating this gear with a finger, the Iris = F-aperture could be changed.

Though, it’s not easy to know what exact the value of  “F” then, since it’s fully 

open value changes from 3.8 at 28mm to 5.6 at 200mm, hard to know what is

somewhere between.  Just trust your camera’s auto exposure.  🙂  

Focus Shift B-4-001

Even with smaller F-aperture, out-of-focus Bokeh is always there.

= and this Bokeh is making the photo looks soft. Though, Bokeh mean

scattered light.  Hence, it reduces the contrast of the photo = may need 

to tinker it by making the photo darker and then brighten the highlight

to increase the contrast. — if it was necessary) 

—– Now I got box-full of broken / malfunctioned lenses = a lots of fun

is waiting to be discovered.  Ha ha ha  😀 

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3 Responses

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  1. elenacaravela said, on May 7, 2015 at 17:22

    VERY pretty!

    • yoshizen said, on May 7, 2015 at 18:00

      Thank you Elena. I wished if it looks sexy. 🙂

  2. […] Then to have a comparison with previous photo by the Focus Shift. […]


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