bduffez

Here is a video where I go from > infinity down to closest and back to > infinity We can see the beach going to a sharpness maximum at about 00:04, then the trees at 00:10, then the tree again at 00:20 and the beach again at 00:27. It feels like there is a position of the knob that would provide focus for both (e.g. "infinity" if 5-8 miles is enough, and the closer tree) however I never reach a good crisp image. So to answer your question, I should reach focus before I reach either end of the focusser. Is it because of the eyepiece? This time I used the 10mm one. It is indeed filmed with my phone with a 2x magnification (pixel 6). focus.mp4

First, thanks all for the time taken to read & provide insights. Much appreciated. I tried again this morning in the same spot and could not reproduce the smearing I saw yesterday. I could get some sharpness in the middle of the smearing so I had assumed that the distance was enough. I tried again with a different target and I have two focus pictures: this is an avocado tree about 300-500ft away and in the background is the ocean/coast which is about 5-8 miles away The 1st image is a focus on the avocado tree, the second is the background. The tree image isn't as good as what I had in the eyepiece (20mm btw), it looked better in real. It was a bit sharper than what we see on the first picture. I don't see the smearing I had yesterday on the pink bush. I don't know what was up with that. Now focus on the background: I could never get the coast/ocean to be sharper than what we see here, which is an accurate depiction of what I saw in the eyepiece. This was taken at about 7am in southern California, about 50F and the sun had just risen. I suspect there was no refraction from heat at that time. So bottom line is my scope does not need any calibration (since the smearing is gone) and the optics are probably what they are... Out of curiosity, what is the limiting factor here? Large mirror, small mirror or eyepiece? Thanks again

Hi. I recently received a Celestron aeromaster 130 as a gift and I am preparing to use it. I already have watched the moon and liked it. I wanted to check image quality during the day. I pointed the telescope at a neighbor's bush about 200ft away. The image appeared smeared and I could not get something sharp. Do I need to perform some calibration to improve image quality? I have added a photo of said bush. All pictures taken with my phone through the eyepiece (except for the 3rd one of course). The pictures obtained are an accurate representation of what is seen with the naked eye through the eyepiece