Posted: Tue Oct 28, 2014 8:51 pm Post subject: |
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CuriousOne wrote:
I had it. Sharpness and CA incomparable with TOU 500/8. Sold it for low price. The optical formula is really different from other 400/6.3, 500/8 lens.
If these other lenses look like this from side: [] -means lens, ---- means tube, | means aperture
[]----|----[]--------
This lens has the following formula:
[]----|----[]-----[]- _________________ I have nothing to compensate with lens |