Last updated: 15 December 2002
Subject: First results under the stars with my new ETX-70 Sent: Friday, December 13, 2002 22:26:18 From: email@example.com (Willi Warkowski) some weeks ago i buy a ETX-70. Because of the lousy weather here in Germany i can't evaluate the scopefor a long time. But this week three wonderful, but very cold nights, give me the change to test my ETX-70 under the stars. Observing conditions: a lot of light-pollution, temperatures between -5 and -10 degrees Celsius (pretty cold) eyepieces 40 mm Super-Plössl, 21 mm Harry Siebert Standard, 7 mm Kasai-Ortho. I hunted down the following DSO's: - h+X (very nice!) - M31 (not M32, nor M110) - M45 (the right instrument for the Pleiades!) - M34 (nice) - M35 (very nice, especially with the Kasai) - NGC663 (best with Kasai-Ortho) - M103 (best with Kasai-Ortho) - NGC457 (best with Kasai-Ortho) - NGC654 (best with Kasai-Ortho) - M36 (not so good, the reason is the light-pollution at this time in this direction) - M37 (not so good, the reason is the light-pollution at this time in this direction) - M38 (not so good, the reason is the light-pollution at this time in this direction) - M15 (surprisingly good with the Kasai) - M2 (i found this globular with the GOTO immediately, but M2 was very near to the horizon) In the used range of magnification i found no sign's of chromatic aberration at DSO's. I checked it with Saturn and the Ortho - the ring is clearly visible with dark between ring and planet - no chromatic aberration. But this scope is not a scope for the planet's! A comment to the Autostar - deep temperatures make this little computer very tired :-)! I recognized a odd thing with the Autostar - every GOTO works perfect, but when i hunted in CAS (nearly at the zenit at this time) the GOTO failed when i go from M103, NGC663 and the others to the "opposite" side of the zenit M52). Any ideas, have one observed this too? Conclusions - a very fine little beauty. I love it. Forget the planet's, go for the bright DSO's! To improve the usage of the scope i ordered the book "Touring the Universe in Binoculars" (i think, the right guide for the ETX) and a zoom-ep, because focusing with the ETX-70 is very annoying (and i have a flexible shaft at the focuser). Without such a flexible shaft there is no way to changing and focusing a new ep near the zenit. Clear skies to all Willi
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