Peter Drew

Solar observation could be your best bet. Warmer, potentially visible every day and you don't need a large telescope. Or lose sleep! 😀

Lucky for me, I was born on a Friday June 13th! 😀

I agree that it looks like a Duran 50 disc or similar low expansion material. David Hinds used such discs and always ground the back surface. He also wrote the focal length and a serial number on it. These mirrors were supplied to many outlets so the additional inscriptions could be third party. If it is a David Hinds mirror you have done well! 😀

I don't think rigidity can be dismissed quite so lightly. Lack of rigidity leads to lack of collimation, the achievement and maintenance of which is essential for best planetary imaging results. 🙂

Lunar and planetary images from Mewlons seem rare despite their reputation, possibly due to their own relative rareness. Most of the best lunar and planetary images seem to come from large SCT's, most leading users for these targets would say that a 210mm was a little on the small side. 🙂

I once read a quote that went along the lines of "The greater the island of knowledge, the greater the foreshore of the unknown". Summed things up quite well for me. 😀

I already have a 220mm F12.5 and the CA is quite noticeable. 😀

An 11mm TV Plossl worked with my PST. Overall I preferred to use a 8mm-24mm zoom eyepiece. 😀

A nice period Gregorian reflector? 😀

Well you talked me into having a look (got to keep up with you younger guys!). Yes, indeed, a nice V shaped prom but very little else of note. 😎

!/4" Whitworth will do if no 1/4" UNC available. 😀

This will all come to pass so apparently slowly that if humans are still around they probably won't even notice it happening. As for "collisions", even the stars in globular clusters are separated from each other by much more than our Earth-Sun distance so that event is likely to be rare. 😀

You'll have a great advantage, already owning your personal Mars "rover". 😀

Put your 200mm Newtonian on the EQ5 for imaging the Moon and planets and swap it out for a good small refractor for imaging DSO's. 😀

Great view. X 500 😀

Will a 1000 words do? 😎

Impressive solar halo on show right now in W. Yorkshire. 😀

Knowing roughly where you are might help, there could be an experienced SGL member nearby who could help you. 😀

As long as there is light at the end of the telescope this problem will arise. I have been very good at buying equipment and very bad at selling any. Consequently I'm running out of money as well as space. 😀

The magnification per inch of aperture for given seeing conditions reduces as the aperture increases. On a night when 300x is the seeing limit that represents 100x per inch for a 3" and only 10x per inch for a 30". ?

Hello Sophie. Another welcome to SGL. Unfortunately, the features of this binocular are the ones that tend to attract beginners but are exactly those that the more experienced user would advise to avoid. If at all possible, I would recommend returning them and replace them with a standard 10x50 binocular. There are plenty of good ones available at a similar price, get back to this forum if you need further advice. ?

Just like the Queen. ?

I hope there's room for another ROR thread ?. This will be the 8th telescope housing I'll have built for the Astronomy Centre over the years and will eventually contain our proposed remotely operated telescope. The main difference with this build compared to the others underway on this topic is that the ROR is constructed entirely of aluminium. The local weather conditions make wooden versions too high maintenance for the time we have available. I did the groundwork over a year ago and member Phil, a builder by trade, built the blockwork walls which saved me a lot of effort. The ROR component will be a pair of biparting doors riding on rails fitted to the top of the approximately 2.5 metre square walls. 2.5 metres was chosen to take advantage of standard raw material sizes for the roof. I have just finished the framework for the first door and started cladding it today. The images, if they post, show the progress from groundwork to finished wall height and the UPVC cladding to protect the blockwork and provide a match to the other on site buildings. The final image shows the first door framework.

I don't think you would notice much difference for EAA use. ?

What telescope are you going to use and is the pier to be a permanent one?, from your appraisal of Rugby it appears you might want to move in the future. ?