Gonariu

Disegno del Sole. Dati del disegno:

• uso di un filtro solare in vetro a tutta apertura.

• Ingrandimenti: 50X con uno zoom Vixen di almeno 10 anni fa.

• Osservazione in luce integrale.

• Rifrattore acromatico 80/400 su un treppiede fotografico.

• Luogo: Orotelli dal mio terrazzo di casa.

• Presenza di inquinamento luminoso, ma le costellazioni in genere si distinguono.

• Osservazione col diagonale stellare, l'immagine poi è stata messa colla giusta orientazione.

• Disegno eseguito il giorno 20 Dicembre 2021 alle ore 19 circa.

Disegno delle Pleiadi. Dati del disegno:

• uso di un filtro solare in vetro a tutta apertura.

• Ingrandimenti: 17X, 25X, 33X, 50X con uno zoom Vixen di almeno 10 anni fa.

• Osservazione in luce integrale.

• Rifrattore acromatico 80/400 su un treppiede fotografico.

• Luogo: dal balcone della casa dei miei a Quartu Sant'Elena.

• Presenza di inquinamento luminoso, ma le costellazioni in genere si distinguono.

• Osservazione col diagonale stellare, l'immagine poi è stata messa colla giusta orientazione.

• Disegno eseguito il giorno 31 Dicembre 2021 alle ore 19 circa.

I bought used at the end of May 2020 an achromatic 80/400 (the Konus Vista - 80) which is of the same type as the ST80, I must say that it is a purchase I have never regretted and I use it for practically everything , Moon, Sun, planets, deep sky objects and panoramas. I keep it mounted on a photographic tripod to be ready for use. Taking advantage of the good weather and the mild temperatures of these days, around 7 pm tonight I dedicated myself to the observation of the Pleiades by making a drawing of it. Unfortunately the place is not the best, here in Quartu Sant'Elena (attached to Cagliari) where I am for the Christmas holidays there is the light pollution of the towns; raising the magnification from 17X to 50X darkens the background of the sky, improving both the vision and the perception of fainter stars. Comparing with a map of the Pleiades which shows the magnitude of the components, the weakest perceived star is of magnitude + 10.02 at 50X as the sky background was quite dark at this magnification. The chromatism was not visible
On the planets. In August - September of last year some details of the surface of Mars were perceived at 200X (the south poare cap, Syrtis Maior and Hellas), this year observing Jupiter with the Baader semi-optic filter (I think at 100X, I don't remember well) , you could see some bands and a black point that after an hour had moved, you could guess the position of the Red Spot. The Moon at 100X and the semi-opaque filter (but also at a higher magnification) or an orange W21a filter is beautiful with a very low chromatism. Also of Venus at 100X if you have a good vision of it, the chromatism is present but does not disturb (without using any filter). The vision of M8 and M7 from the terrace of Orotelli or not sorry, the nebilosa had many stars in the background of the Milky Way. I enclose the drawing of the Pleiades made tonight and a drawing of the Sun made before Christmas. Happy New Year to all.