I just bought an old refractor telescope and thought I'd write a little about it.
A long time ago, exactly such a model was my very first telescope in the 90s.
The refractor comes complete with a tripod, finder scope, star diagonal, eyepieces and even a star map. Everything in a plastic case. What more do you need?
I bought the refractor used just for fun. It must been in the attic with the previous owner for 20 years! The telescope has really hardly been used. Unfortunately I forgot why I don't like used items: The smell is really bad. I had to clean EVERYTHING first and the thing still smells! Well, hopefully the smell will soon disappear.
When assembled, the telescope with tripod weighs 2.200g. It is a lightweight. In comparison, the 102 ED it is a heavyweight.
The Astrolon 60/700 is a bit wobbly with the azimuthal mounting AZ-2, but ok. The finder scope is surprisingly showing a correct image. But the view is a bit cloudy.
The eyepieces are a disappointment for me. blurry, poor coating and pronounced distortions. Especially with the 9mm. It's not fun to look through it. The eyecups cannot be pulled down either. You need to upgrade the eyepieces!
The star diagonal is very cheap too. It has a very small opening. You need to upgrade the diagonal!
A magnification of over 60x makes the picture very dark.
The supplied 9mm (77x EP = 0.7) and 4mm (175x EP = 0.3) are practically unusable because the exit pupil is simply too small. At least for my taste. :-)
I didn't change the exposure time for the pictures in order to visualize the darkening more strongly.
You just have to replace the star diagonal and the eyepieces! With a 32mm (21.8x EP = 2.75) or 25mm (28x EP = 2.14) looking through is a lot more fun!
The gain in field of view is enormous!
I looked at the moon with the telescope this morning. It was quite low (11°) and was slightly covered by clouds. Maybe it was because of that but I did not see any chromatic aberrations! I was amazed and a little shocked. As soon as the cloudy sky in Hamburg allows it again, I will try to take photos of the moon.
It is also strange that panels have been installed in the interior. I suppose to prevent reflections. I've never seen it like this before.
I would describe the coating as very poor. I couldn't take a picture where the coating is visible. It's not really visible on the eyepieces either.
Nevertheless, I am happy to have used the opportunity to get the telescope – Even though it needs a little upgrade before it starts to get fun. Fortunately, I am well equipped and can replace the less good components.
Would I give the telescope away as a beginner's telescope? I think it depends on the person. The focal length of 700 mm could be a bit too much challenging for a 5 year old. But a 10 year old would certainly be fine with it. Only the supplied eyepieces were not that great, even for beginners. But nowadays you can upgrade everything at a moderate price.
Thank you for your attention
Edited by Skywatcher Simon, 21 October 2021 - 03:26 AM.