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A new (old) 'frac added to my wee family of scopes. From an Astromedia kit of a slightly smaller copy of one of Galileo's refractors. Not had a chance to view the night sky yet, but get a 12x magnification, so should be able to see the moon in a little more detail. Field of view is small, but as one of the first kind of telescopes made this was cutting edge back in the day I guess!
Hope for a chance tonight to observe something if the clouds permit!
Hello all! I am a total noob and I have an eyepiece and a Barlow lens question:
I have the Gskyer AZ70700 Refractor Telescope that I bought from amazon for my father and we have been using it for a week. It came with the 10 and 25mm eyepieces and a 3x Barlow lens.
My father's old "BRESSER TRAVEL 20-60X60 SPOTTING SCOPE" that our cat destroyed had a zooming option that my father loved so after some research, I've also ordered the "Celestron 8-24mm Zoom Eyepiece (1.25")" from amazon and I hope it will work well with the telescope when it arrives in a week. I also assumed it would be a better quality eyepiece than the eyepieces that came with the telescope.
Now my question is: Do you think a 5mm eyepiece would work well with my telescope? If so, what is the best 5mm eyepiece that I can buy below $30. Another question I have is that the 3x Barlow Lens that I have is making the view blurry and not clear like when I don't use the Barlow lens. Do you think a 2x Barlow lens would be better for our telescope? If so, what is the best 2x Barlow lens that I can buy below $30. I saw 2 Barlow lenses that were made by SVBONY and Solomark that are around $16 but I don't know if they are the right ones for our telescope and I wouldn't know which one to buy. I assume maybe I won't need to buy the 5mm eyepiece for better viewing if the 2x Barlow lense will work with my 10mm eyepiece or with the Celestron 8-24mm Zoom Eyepiece. What do you guys think? I would really appreciate any answers.
My friend and I are trying to make a DIY refractor based telescope which will be used only for solar projection as our personal monsoon project. We don't have any specific plan yet but roughly this is the idea : suppose an 80mm achromat f/10 (or similar) with a zoom eyepiece attached to a Sun funnel. (Or similar)
My major concern is the heat build up in the scope. I use my 90mm f/10 refractor for solar projection and within 15 min I can sense the heat built up inside.
Any ideas or suggestions on this? Are there any specific coatings which can work for heat reduction? Any thoughts are welcome!
P.S. I am from Mumbai region and summer temperature does rise up to 40+ degree Celsius. Also,I don't want to have a telescope smaller than 70-80mm aperture.
By Cinco Sauces
I have long considered different options for a capable yet affordable combo that will enable problem-free train and air travel, as well as comfortable bicycle and backpacking tours. I recently saw that this new scope has become available and got interested. As it is a new product there is not much information around, with the exception of a lengthy thread in a German forum and one in CN (where I also posted more or less the same content shown below, except for the photos, that are only posted here - hope you do not mind).
I received the scope yesterday. The telescope is indeed small (43 cm without diagonal, compare with normal keyboard below) and relatively light (~2.8 kg). It came well packaged. The important parts (focuser, dovetail, lens?) are of good quality, with the exception of the diagonal which obviously needs upgrading to something more serious. Other parts are less qualitative (finder scope, the finder scope plastic holder, the included 26 mm plössl eyepiece) but I do not worry about these since I will not be using a finder scope and have other, better eyepieces. The package included two extensions as well, I assume for photographic use.
Tests made during daylight using the supplied 26 mm plössl (giving 17.7 x) showed very nice images without any striking problems. The combination of scope, diagonal and EP apparently inverts horizontally but not vertically, so the system works well for terrestrial targets as birds. I also setup up at "night" to do some tests but these results are possibly not very representative since it does not get dark here in this time of the year (only civil dark with the Sun reaching a minimum elevation of 8 degrees below the horizon). A street lamp about 50 m away showed a clear blue rim on one side. Not terribly annoying, but it was there. Same with Arcturus, which showed a red tint, or flare that shouldn't be there. Dimmer stars looked OK, but as said above, the sky was too bright and I could barely detect stars of mag 7, even with this scope. I could not test with Moon or Jupiter, as these were hidden behind the trees. I used the ES 82/8.8 mm eyepiece for these tests.
I also acquired a Vixen Porta II Altaz mount on an APP-TL130 tripod for use with it. The mount is simply excellent, and the tripod is sturdy and very light, a highly recommendable pair! My first impression is that this telescope is great value for the money and that the system will work perfectly for my intended purpose. The fact that bright stars, and surely Moon and planets, show obvious chromatic aberration is not a problem for me. As a visual observer, mostly interested in variable stars and DSO's, I believe this scope and mount will provide a good combo for me. For all other things I can always use my 200 f/5 Newtonian.
I will write a longer review when I do some serious night testing. That will be when it actually gets dark again, namely in two months