 Posted: Thu Dec 15, 2011 7:53 am Post subject: |
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torbod wrote:
Ok.. Lets present some focus test images to conclude the thread.
First out Ginger cookie @f/2.
1. The whole plot
2. Manual focus
3. AF confirm from mfd
4. AF confirm from infinity
5. AF confirm in between mfd and infinity
Conclusion. AF confirm beat me with a hair from the best direction, otherwise my eyes are better than the rest.
You can clearly see the hysteresis when AF confirm is used from the other direction.
Secondly Candle @f2
1. Manual focus
2. AF confirm from mfd
Conclusion, It's almost a draw between my eyes and AF confirm from the best direction, my eyes are a little bit better in this case.
Thirdly line through letter K @different f-stop
1. Manual focus @f/2 (look, another Russian stealth APO lens)
2. Manual focus @f/4
Conclusion. I focus with my eyes good enough no mater what F-stop is used, the lens is sharp and contrasty enough from wide open. The helping line through letter K makes it very easy to nail focus perfectly. Still I have found no explanation for the focus shift I experienced before, but I'm glad that it is gone.
That was that, I hope it can help someone else eventually.
_________________
For Sale or Trade: Pick from the list below.
Manual Lenses: CV 15 4.5 | MIR-20H 20 3.5 | Elmarit-R 28 2.8 | Flektogon MC 35 2.4 | S-M-C Tak 50 1.4 | Rollei 50 1.8 HFT | Helios 44-3 MC 58 2 | MC ROKKOR-X 58 1.2 | MacroPlanar 60 2.8 | Vega-12b 90 2.8 | Tamron 52B 90 2.5 | CZJ 135 3.5 | Jupiter-21A 200 4 | Tair-3s 300 4.5 | KOHBEPTEP K-1 | Takumar x2 |
Camera: Sony Nex 5N |
Last edited by torbod on Thu Dec 15, 2011 8:34 am; edited 2 times in total |
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