Cassiopeia Observatory logo

ETX-105PE Observing & iPhone 6s Plus Imaging

Posted: 19 December 2015

Open: Friday, 18 December 2015, 1808 MST
Temperature: 57°F
Session: 899
Conditions: Clear, some breezes

The snow and ice finally melted after Monday's 1" snowfall.

Upon opening the observatory I received a notification from SkySafari 5 Pro about an Iridium satellite flare occurring in a few minutes. Such notifications are one of the new features in version 5 (review will be posted soon). I looked where it said the flare would be and sure enough, there it was, right on time.

1820 MST: quick look at the near First Quarter Moon with the 8" LX200-ACF at 83X. I then began setting up my 10 year old ETX-105PE on the observatory patio:


I plan to use the ETX-105PE at an event later this month so wanted to check it out.

Auto Align was successful. I did a GOTO M1 (Crab Nebula), which was low in the eastern sky. The AutoStar #497 put M1 in the 26mm eyepiece (57X) field-of-view (FOV). M1 was faintly visible even with the bright Moon high in the sky. Then did a GOTO M57 (Ring Nebula); AutoStar put it in the center of the eyepiece FOV. A GOTO the Moon was also good. The Moon appeared sharp at 57X. Seems like my old ETX-105PE will perform well at the upcoming event.

Using the Orion SteadyPix Universal Smartphone Telescope Photo Mount I mounted my iPhone 6s Plus on the ETX-105PE for afocal imaging of the Moon. This is afocal 57X:


Added a Meade Series 5000 3X TeleXtender to the 26mm eyepiece (yielding 170X) for this iPhone photo of the northern portion of the Moon:


Next, I used my Baader Hyperion Zoom 8-24mm Mark III Eyepiece on the ETX-105PE. As I mentioned in my review, this eyepiece would be good for use at star parties and I plan to use it at the upcoming event. The views of the Moon were excellent at all focal lengths, yielding magnifications of 61X to 184X.

1925 MST: ended ETX use. Returned to the 8" telescope in the observatory and did some lunar observing at 83X. I then did some more tests with SkySafari 5 Pro on my iPhone 6s Plus for my review. 1947 MST: last look at the Moon, 83X.

Close: Friday, 18 December 2015, 1959 MST
Temperature: 55°F
Session Length: 1h 51m
Conditions: Clear, breezy

Comments are welcome using Email. If you are on Twitter you can use the button below to tweet this report to your followers. Thanks.

Previous report

Cassiopeia Observatory Home Page

Back to Top

Copyright ©2015 Michael L. Weasner /