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I just love that there is 50mm viewfinder as optional accessory :D

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Maybe it will bring cost a bit down if not included with the scope?

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The shipping seems very reasonable.....

Interesting. At f11 ish it could be an ideal donor scope for a PST mod!

Paul

 

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It would still have similar issues to other large apertures with cooling to ambient and suffer more during poor seeing than small APO's do.   Though I suppose if you could afford one, you could also afford a suitable observatory and a good location.  ? 

Edited by Peter Drew

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I would have definitely ordered it with a 4 inch or bigger focuser and then commissioned Harry Siebert to custom design some giant eyepieces for it between 60mm and 90mm with 65 to 70 degree AFOV or so.  That would get the power down to between 70x and 110x so it could be used during mediocre seeing conditions and on larger objects.

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9 minutes ago, Peter Drew said:

It would still have similar issues to other large apertures with cooling to ambient and suffer more during poor seeing than small APO's do.   Though I suppose if you could afford one, you could also afford a suitable observatory and a good location.  ? 

Interesting bit of history on another 20" APO made years ago by Tinsley (and/or a Swiss firm?) for a wealthy Texas Oilman's son in the 50s/60s and then donated to Lowell Observatory in the 60s/70s, used for a time, then displayed in their museum, and now in storage.

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1 hour ago, michael8554 said:

Only 2" eyepieces !!

Michael

That surprised me too! 

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600kg just for the lense?! Any owner is going to need to keep some money aside for a gym membership!

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LZOS do make exceedingly good objectives :wink:

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It almost fits in airline carry-on luggage!

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10 hours ago, Paz said:

600kg just for the lense?! Any owner is going to need to keep some money aside for a gym membership!

Just for the lens?. I thought it was the whole setup.

I'm out.

Edited by LukeSkywatcher
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Well I was very tempted to click the 'add to basket' button. But at 6.5 metres focal length, I would have to build a new shed.
Then again, with 18-24 months delivery time, I could do it.
Just realised, it is over my credit card limit!

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30 minutes ago, Carbon Brush said:

Well I was very tempted to click the 'add to basket' button. But at 6.5 metres focal length, I would have to build a new shed.
Then again, with 18-24 months delivery time, I could do it.
Just realised, it is over my credit card limit!

And the price quoted is just for the lens. The best price Ive seen for a fully built up scope based on this lens is a very reasonable €995000. I guess then you’ll actually need some form of custom mount. Don’t think the venerable HEQ5 would carry it. At least not for AP :D

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This is a 250mm F/16 refractor - imagine what a 500mm would be like :shocked:

 

891868-15.jpg

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Weighs in at 600kg lens only ... imagine how heavy the end scope is going to be. You'd need a crane to set this whole thing up.

Edited by KP82

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2 hours ago, John said:

This is a 250mm F/16 refractor - imagine what a 500mm would be like :shocked:

 

891868-15.jpg

That just redonkilous.

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I suppose you could fold the light path with high quality mirrors to shorten the tube, but that would seem sacrilegious.

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But really, why does this product actually exist and why would anyone buy it?

Cheers

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Because aperture fever ?

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On 03/03/2019 at 00:48, beka said:

But really, why does this product actually exist and why would anyone buy it?

Cheers

As a gift for an ultra-wealthy person's son or daughter who wants to try out astronomy? ?

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On 27/02/2019 at 11:48, LukeSkywatcher said:

That just redonkilous.

I like it! With the objective above cloud level you can always observe! ?

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