Gonariu

Is it a 150/1200 achromatic? I have read some nice reviews on the achromats 150/1200.

In 1999 I bought the Konusuper 120 with which in 2003 I had made some beautiful observations of Mars even if for something I was not convinced (a slight lateral smear observing the planets, especially Venus). A couple of years ago I noticed a chip on the edge of the achromatic doublet of a few centimeters (less than half an inch), so I put a 90 mm black cardboard diaphragm in it. In doing so it has become fantastic, excellent views of the moon at 333X and of Mars in the opposition two years ago at 200X-333X. I have never had nor have I ever tried an apochromat (or ED apochromat), last year I preferred to buy the Nexstar 8 SE, an instrument that ultimately shows more for the same cost. It may be that one day I will be overcome by the temptation of apochromats, perhaps a Takahashi, now it would be wasted as I am little more than a "curious about the sky".

Nice optics, and the tripod feels sturdy enough.

A good Barlow 2X apochromat would also fit.

Last night I pulled out the C8 because I wanted to test the SV 305 on the moon. I let it "acclimatize" (for fussiness, when at 8-9 in the evening there are still about 30 C this was certainly superfluous, but to be on the safe side .....), while I am waiting I take out the vintage achromatic 60/900 which I bought used last month which at 150X with an OR6 gives me a good view of our satellite; in particular Theophilus, Cyrillus and Catharina are very beautiful. Even with the C8 you have a very beautiful vision but I do not dwell much, I connect the planetary chamber to it, but not even the shadow of the Moon. I then use the Konus Vista (achromatic 80/400) with which I can visualize the Moon on the computer screen, thanks to the much shorter focal length; to get a better and bigger view I am putting a Celestron Barlow 2X found in a case. I correct at least a little the green cast given by the SV 305, the movie that comes out is not great but, being the first experience, I am happy with it and I go to bed satisfied at half past midnight, I place the electric fan in front of it as the my room felt a little too hot (normal, with a maximum of + 40.9 C). I would have stayed on the terrace again, at least until 2 to see more as the moon had set, but this morning I had to be at school at 8 for the state exams.

Sure, by selling the boat we get the money for an apochromat that is transportable. I also like to see the sun, when I start I make a drawing of it in a special notebook, only now we go roast here, shorts, slippers and T-shirts are a must!

Thanks, I reciprocate the greetings! The covid broke everyone's soul for two good years, I really hope for me and everyone in normal times.

I have to decide to get up early to start seeing the planets, for Mars then waiting for the opposition at the beginning of December is both a bit far away and there will be a lot of cold as opposed to now which is making a low of 20 C abundant. Since this year's opposition is less favorable than that of 2020 (about 17 "instead of 22" .6) it is better to do some training first (both visually and with the planetary camera I bought, the SV 305). For mosquitoes it is a common problem ... for about ten years if I do not spray the Autan, in the summer I am devoured alive by mosquitoes & papatacci!

Yes, in the summer they are seen among the best DSOs of the year, many of them in Sagittarius. Tonight I think I'll put myself after dinner to see something, I won't wait for the astronomical twilight (around 11pm) because after dinner I get a deadly sleep, a few weeks ago I was about to fall asleep on the telescope (a small achromatic 80/400 on a good photographic tripod) with the risk of combining damage .....

I didn't know that weed made it easier to dampen vibrations. I observe from a large terrace here at home which is certainly not ideal as it is well radiated by the sun during the day. that I bought back a C8 (the Nexstar 8 ) the better.

Nice picture, I noticed that looking at the Sun with a W58 green filter you have an excellent contrast. I look at the Sun with satisfaction with a small achromatic 80/400 at the hottest hours with about 35 C, but you can stand it.

It would bother me very much that during the summer, which is the period in which one can enjoy astronomical observation without the cold or with milder temperatures like you in the UK, to have problems with twilight or white nights. The winter cold sometimes dissuades me from putting out the telescope as I have a mild chronic pharyngitis and, in these times, even a simple sore throat (which sometimes comes to me) can be a symptom of covid (in normal times not me it mattered nothing). Remarkable is the commitment and tenacity with which you exploit even the least favorable situations with good results.

Beautiful photographs of the Moon and beautiful observation post, in particular the grass in the garden greatly decreases the heat radiation during the night of the heat received during the day.

Welcome to SGL; we Sardinians have a special bond with you Spaniards!

Happy Easter everyone !!!

As an astronomy book I use this: Title: Star by star. Author: Piero Bianucci. Publisher: Giunti. The text is in Italian, I don't know if it has been translated into English. As a book I like it very much, I use it to plan my deep-sky observations.

Too beautiful photographs, congratulations !!!

I looked at them today at Cagliari between 13.10 and 13.31 with a small achromatic 80/400 (Konus Vista - 80) equipped with a glass solar filter with full aperture at 50X (with a Vixen 8 - 24 zoom eyepiece. not so recent anymore, bought used by a friend). I also used a star diagonal mirror (otherwise you can't get into focus). The observation was conducted in full light. In the photograph I took with my mobile phone of the drawing (putting on the flash) the shadow of the leftmost spot did not come.

I thank everyone for the valuable advice; so far I have been a (almost) pure visualist, but for some time I have realized that to make contemplative observations of the Moon (I observe and search on a lunar map what I see at the telescope) the old Konus 60/700 achromatic refractor, bought in 1983 when I was a boy, was more than enough; a better telescope used only in this way is wasted. I think (and hope) that I will not have software problems as last year I got a second laptop, in fact the first one could fail and I would have had problems with distance learning (I'm a math and physics teacher).

I bought a used Nexstar 8 SE with which I would like to do more serious things than the contemplative observations of the Moon & planets I have done so far.

I would like to start with the photography of the Moon, Sun and planets and I have seen these planetary cameras from Svbony, the SV 105, the SV 89 and the SV 305, what do you think? Has anyone tried them?

In fact, the Sun gave a show last month, also thanks to the good weather that around 10 December deigned to do after a month and a half of rain every day. Today at 13.53 (Italian time) with my achromatic 80/400 at 50X it was desolately empty; the new cycle seems to have been on alternating current for some time.

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.