ETX90 | Niels Noordhoek's weblog

Archive for the ‘ETX90’ Category

Monday, April 30th, 2007

Using a solar filter that attenuates the suns light about 100,000 times, it is possible to safely watch the sun directly through a telescope.

Tuesday, April 3rd, 2007

In an ideal world, a 512 pixel wide Saturn image would look like this:

But if an 8 inch telescope (like C8) would be used in perfect seeing, the resolution would be limited to (simulated with Aberrator):

For the 90 mm ETX90 it would look like:

Wednesday, June 7th, 2006

June 7th 2006, Jupiter, red spot and a hint of “red spot junior” in the lower right of “senior”.

Timelapse (animated gif) between 22h50 and 23h11:

Tuesday, April 4th, 2006

Mosaic of 15 registered and stacked (Registax 3) movies, made with ETX90 and Philips Toucam.