andrew s

It happens even if to the best. Regards Andrew

Uses "Newt for the Web" Google will find it. You can put in your dimensions and it will tell you what results you will get. Field of view, vignetting etc. Regards Andrew

Very peaceful. Regards Andrew

Very interesting and fine capture. Regards Andrew

To avoid getting banned for hijacking this thread I place my last two (who are you kidding) cards on the table. The Arcturus has the spectra of , surprise surprise, Arcturus and the Sun over 300 hundred pages and the Multiplet tables has 96 pages of spectral lines and their transitions and needs a magnifying glass to read. Regards Andrew

Strangely not, but I raise you a Catalogue of the orbital elements of spectroscopic binary systems and Tables of spectral ines of neutral and ionised atoms. No pictures and not good reads. Regards Andrew. PS I have trump in reserve if needed

While not something I have owned, when I was a teenager I managed a personal tour of the Cambridge observatory. In addition to seeing my first glimpse of Sky and Telescope (not easily available in the UK then) the map room was full of wonderous atlases and around the walls stacks of a complete set of contact prints form the original Schmidt DSS. I was one lucky lad. Regards Andrew

Not forgetting this. I can't resist a picture book. That it I am almost sure. Regards Andrew

That reminds me I also have this. It has 600 galaxies The plates and filters used were intended to give a uniform common representation of their colours. Again beauty on every page. Regards Andrew

I have it too and used to dream of building a Schmidt camera. I still think the black and white images stand up well to the modern colour images. Regards Andrew

Well done nice capture. Regards Andrew

Here are my Smithsonian Star Atlas and C Papadopoulos 3 volume Photographic Star Atlas. Both much used before Planetarium software and plate solving, not that the 3rd volume Sothern Skies got used at all. Regards Andrew

If I were Joseph von Fraunhofer I would ge after the lot of them. Regards Andrew

The effective focal length depende very sensitively on the mirror separation and distancee between the secondary and the focal plane. These are linked quantities. Regards Andrew

Sorry I don't know but it reminded me of a similar phenomenon. If I look at my watch it always seems to take longer for the second hand to move the first time than subsequent ones. Regards Andrew

Yes

Spotting scopes ok no binoculars. Regards Andrew

No

Yes

Ok so once lock down is over how many simultaneous visual observers could you accomodate using you kit. Minimum requirement is a fuctioning telescope and mount. Any astro capable telescope any class of mount (no hedges or railings). Winner gets a to be announced prize. Me currently zero. Over to you. Regards Andrew

No chance. Regards Andrew

No amount of dressing up would make me normal. I live my padded shorts. Regards Andrew

Having spent a small fortune building a light weight carbon fibre mountain bike I am not going to add a rack however stylish the tripod. I know lycra is not my best look so will consider the jacket Had a double take on the third item and had to look up what it was. Kowa 553 on it's way! Tripod pending. Regards Andrew

Thanks @JeremyS. That walnut report 823 looks just the job. Shame I would have to swap out all the rosewood furniture. Stop it don't give SWMBO any ideas she has enough of her own. Regards Andrew

Not ordered yet but soon I think.