Pentax PCF WP II 20x60 - recenzja nieosobista

Postskymacho2 | 22 Mar 2009, 13:28

aktualnie na polskim rynku jest dostępna w cenie ok. 900 zł lornetka Pentax PCF WP II 20x60 z polem widzenia tylko 2.2 st. ale dająca świetnej ostrości obrazy. Na Zachodzie lornetka Pentax PCF 20x60 jest dość ceniona w zastosowaniach astronomicznych ale w Polsce ma ona taniego konkurenta jakim jest rosyjski Kronos 20x60.
Na portalu optyczne.pl jest dostępny jej test:
http://www.optyczne.pl/21-Test_lornetki ... _V_WP.html
Natomiast na cloudynights.com poświęcił jej sporo uwagi Ed Zarensky:

-----------------------------------------------------------------------------------------------------------------------------------------

"The Pentax 20x60 has a 2.2° fov, actually measured 2.18.
The triangle of Vega, epsilon and zeta Lyra is just barely seen all at once.

62 arcsec nu Draco is easily seen everywhere.
21 arcsec (61 Oph) is seen out to 90-95% of fov
14.2 arcsec (100 Herc) is seen out to 80-85% of fov.

This is outer field sharpness rivaling the best binoculars, but do keep in mind this is the narrowest fov binocular of any I have ever seen."

-----------------------------------------------------------------------------------------------------------------------------------------

"A few more tests on these WP II 20x60s.

Resolution is pretty good, not in the top tier but comfortably better than the mean.

Off axis sharpness is among the best. I generally compare the usable fov measured to 600 arcseconds. The 20x60 is only 400 arcseconds at 95% out and has a usable fov right to the edge, giving it a usable fov wider than some 20x80s I’ve tested.

17mm of usable eye relief. Works best for me with eyecups turned out one notch.

Laser test shows good light beam transfer. Although one barrel had an optical axis more tilted than the other, the overall beam transfer was pretty good.

Aperture measured at 57mm. Magnification checks at about 19.5x to 19.8x.

Near close focus magnification is 20.5x.

Pincushion extremely low, among the least measured, may mean this binocular is a bit more difficult in most terrestrial observations as a lack of pincushion may translate to a greater rolling ball effect, (Although to my eyes, no rolling was seen)."

-----------------------------------------------------------------------------------------------------------------------------------------

Na cloudynights mamy też recenzje tej lornetki:
http://www.cloudynights.com/item.php?item_id=227
http://www.cloudynights.com/item.php?item_id=226
i porównanie z Celestronem 20x80:
http://www.cloudynights.com/item.php?item_id=178
teleskop: refraktor Soligor RT - 1000 / 3.7" E
okulary 1.25": PL 32, 25, 15, 9, 6 mm
filtry 1.25": Orion V-Block, Orion VPF, Antares ALP, planetarne
lornetki: Nikon AEx 10x50, AVII 7x35, SsEx 8x25; Soligor ANV 10x50; Prinz 10x50
 
Posty: 1037
Rejestracja: 01 Lip 2007, 13:32
Miejscowość: Kraków

Użytkownicy przeglądający to forum: Google [Bot] oraz 16 gości

AstroChat

Wejdź na chat