z pewnością Pentax PCF WP II 10x50 to ciekawa opcja szczególnie za tą cenę:
http://www.lornetki.pl/karta_produktu.php?idProdukt=105
jednak warto przyjrzeć się bardziej kompleksowym porównaniem Nikona i Pentaxa tego samego autora - Eda Zarenskiego (edz)- przygotowanym 4 lata później niż opinia zacytowana przez jimixa:
http://www.cloudynights.com/item.php?item_id=1770
czytamy w nim między innymi:
"Pentax PCF WP 10x50 - 10x49, 5.0-deg, er=13mm, IPD=57-74, cf 20ft, fmc/fmc
It has the smallest fov at 5.0-deg. But is has one of the sharpest outer fovs of any binocular. It has a limited adjustability to the push/pull eyecups, but is otherwise very well built. It has very little reduction of aperture or internal vignette. The Pentax losses most of its points for poor resolution and narrow fov. Other than that it performs pretty well. "
"Nikon Action Ex 10x50 - 10x48, 6.1-deg, er=13mm, IPD=56-73, cf=20ft, fmc/fc
The Nikon AE is sound mechanically and has some of the best ergonomics. Normal resolution is below average, but boosted resolution is one of the best. The aperture shows only minor reduction. Coatings do not rank as the best, but internal vignette is well controlled and illumination is good. There are no internal reflections. Limiting magnitude always scores well. Outer field sharpness falls off at 60% out, but holds on fair out to 80%. Eye relief is not ample at 13mm, but there is no chance of hitting the well recessed eye lens with your eyeglasses. Eye cups are widely adjustable and IPD covers a wide range. Diopter is very easy to adjust. Overall, the Nikon AE scores the highest of the 10x50s, but not by much over the Pentax. Each does some things slightly better than the other."
A tu porównania na optyczne.pl:
http://www.optyczne.pl/10.3-Test_lornetkek...ie._Wyniki.html
Podsumowując masz 3 porównywalne opcje: Nikon Action Ex, DO Titanium i Pentax PCF. Ja preferuję Nikona ponieważ stawiam na mały astygmatyzm - jak już ktoś zauważył "w zastosowaniach astro lornetkom o małym astygmatyzmie można wybaczyć wiele".