12" Dobs on Ebay

[Dons255]

Any good / any use to anyone?

link1

link2

Apologies if repost, didn't see them but eyes gave up a couple of hours ago.

[Beulah]

The "dowel rod" telescope would be a good buy for the mirror alone. I don't think I'd want to buy a scope that was built of dowel rods - with regards to humidity, they are very susceptible to movement!

[Dons255]

Ok, this is probably going to be a stupid question, but is there any reason somebody couldn't buy two of these and treat them like a very large pair of binoculars?

Ok, so some sort of adpator would be needed, and a lot of space and fiddling about to get them properly lined up... but doable?

[matt c]

The possible David Lukehurst one looks good I think you could get it re-silvered for around £120 ish at that Galvoptics place. All in all it would be cheaper than a brand new 10" skyliner. I have to admit if it's made of wood I'd probably give it a miss though........hhmmm of maybe not

[brantuk]

"is there any reason somebody couldn't buy two of these and treat them like a very large pair of binoculars"

Don's - Try this link mate :

http://stargazerslounge.com/diy-astronomer/104439-diy-16-binoscope.html

Cheers

[runoffshed]

Ok, this is probably going to be a stupid question, but is there any reason somebody couldn't buy two of these and treat them like a very large pair of binoculars?

Ok, so some sort of adpator would be needed, and a lot of space and fiddling about to get them properly lined up... but doable?

Getting the optical paths close enough (the width of your eyes apart) but 'away from' the tubes so you can physically get your head in position would be very tricky ....transfer lenses, perhaps?

Like to see someone have a go, though.

John

[ZOG]

Couple of diagonals and extension tubes ??

[brantuk]

Lol - you missed it - click the link in my post above

[Dons255]

wow, I like the idea of a nice big binoscope (thanks for the link) - way above my comfort level (for now) so if there are any pennies left in the bank, will take a punt on the 'possible Lukehurst'.

[Dons255]

Having said that, mebbe both... avoid resilvering the mirrors for the time being by scavenging from the wood one.

Why didn't anyone warn me how expensive these hobbies (photography's the other one) get way back when???

[brantuk]

Yup - that binoscopes an awesome bit of kit - terrific idea and lovely bit of engineering - I reckon it answers your question admirably lol. Glad you enjoyed it

[runoffshed]

Lol - you missed it - click the link in my post above

Just seen the link ...what a remarkable piece of engineering!

[brantuk]

Awesome eh! It wasn't such a daft question after all lol

[haitch]

They would also need to have the same focal length for a binoscope which looks unlikely as the dowel one is f6 and the Lukehurst scope looks to be no more than f5.

[Beulah]

They would also need to have the same focal length for a binoscope...

Oooh, my eyes ache thinking about it!!

[haitch]

Oooh, my eyes ache thinking about it!!

Bad enough trying to merge the image on slightly miscollimated binoculars!