Samyang 8mm Fish-eye calibration

Started Nov 25, 2011 | Discussions thread
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Edward Sargent
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Samyang 8mm Fish-eye calibration
Nov 25, 2011

If you don't have liveview adjusting the focus ring on the Samyang is impossible, in fact Ken Rockwell's glowing review of this lens "Forget trying to focus through the finder. Depth of field is so great that the most effective way to focus is to guess the distance, set it on the lens, and then leave it alone" Well the first few months with the lens I only had a KN&D and a A700 so liveview was a pipe dream.

When I got the A77 last month I finally got around to adjusting the focus ring following Glenn's instructions http://www.focusonnewfoundland.com/section488880.html and realized after I did it there is an easier way to adjust the focus ring that works for all cameras live-view or not.
1. Rollback the rubber focus ring on itself front to back.

2. Rotate the focus ring counter clockwise (as you look down the barrel back to front) to the stops.

3. Loosen the three slotted screws thee turns (loosen too much and they fall out). Leave the Phillips screw alone.

4. Rotate the focus ring so the infinity mark is aligned with the focus mark (also the line indicating aperture setting).

5. Tighten one screw and reverify the focus mechanism did not move off the the stops if it did loosen and re-adjust.
6. Tighten all the screws and unroll the rubber cover.

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Sarge

A77, A700 8mm Bower, 50mm 1.7, 35-70 F4, 90mm Tamron, 18-250 Sigma & 50-500 Bigma
Fisheye photos at http://sony-snapper.com/Fish-Eye/index.html
Toy - Asus Transformer Android 3.2.1 tablet
Albums at http://www.sony-snapper.com

 Edward Sargent's gear list:Edward Sargent's gear list
Sony Cyber-shot DSC-QX10 Sony SLT-A99 Sony a77 II Sony 70-200mm F2.8 G Sony 70-300mm F4.5-5.6 G SSM +25 more
Sony Alpha DSLR-A700 Sony SLT-A77
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