SHOW US YOUR NEWTS........

[coatesg]

Just seen this thread - thought I'd throw in some pics of my double truss newt.

Optics were from an Orion SPX350, but I got fed up of the thin walled tube that just wasn't enough to take the weight of everything for imaging. Bought the spider and new mirror cell, and reused the Moonlite CR2, but everything else I designed and made with help from a couple of mates, one who can weld ally, and one has a mill in his garage.

I need shrouds, to wire up the secondary dew heater, and to mount the new PC on the scope, but it's otherwise working!

Mount underneath is a Losmandy Titan - might need another counterweight too :-/

[iapa]

need to crop the 'fracs out

l-r

10" f4

8" f5

130mm f5 (ish)

Edited January 11, 2018 by iapa

[laser_jock99]

13 hours ago, alacant said:

Thanks. Good to know. Next problem is that it doesn't reach focus with a dslr. Even with an 11mm Canon t-ring, there's not enough outward travel on the focuser. As I'm using the Aplanatic cc I can't use an extension tube so I'm gonna need a collar which slides over the cc to push the camera further out from the focuser, or take pot luck tightening the focuser without pushing the cc fully home. Why they've put the secondary so close to the primary, I've no idea. Close to giving up. Surely, it can't be this difficult! Any ideas anyone?

Cheers and clear skies.

I don't recall having this issue- although I use mainly the Baader MkIII Coma Corrector which is a much shorter device than the aplanatic CC. You could always move the primary up the tube say 10mm by taking a slice off the bottom end!

[alacant]

12 hours ago, laser_jock99 said:

You could always move the primary up the tube say 10mm

Hi. Unfortunately, that would make matters worse. I'm already at the end of outward travel of the focuser; I need further out. I've reluctantly given up. Here's my newt:

Edited January 12, 2018 by alacant

[tuckstar]

My 250px skyliner.

Setting circle and wixey fitted. Dew shield and dew bands, lazy susan bearing, shed leveling feet, heated telrad, fully flocked, cooling fan and resistor on the secondary. Lacerta focusor upgrade and also now has a 10x60 raci finder.

 

Edited January 12, 2018 by tuckstar

[laser_jock99]

On 12/01/2018 at 06:50, alacant said:

Hi. Unfortunately, that would make matters worse. I'm already at the end of outward travel of the focuser; I need further out. I've reluctantly given up. Here's my newt:

Not sure I understand your problem. The normal 'cure' to extend the point of focus outwards beyond the current travel of the focusser is to move the primary mirror closer to the secondary (i.e. shorten the the tube).

[coatesg]

1 hour ago, laser_jock99 said:

Not sure I understand your problem. The normal 'cure' to extend the point of focus outwards beyond the current travel of the focusser is to move the primary mirror closer to the secondary (i.e. shorten the the tube).

That or you can use an extension tube (though you might land up vignetting at the drawtube if it's too far out). I have to use a 2" extension to come to focus as I designed the scope for imaging and so have 60 mm between lowest travel and focal plane. Works fine

[alacant]

15 hours ago, laser_jock99 said:

Not sure I understand your problem.

Sorry. My poor explanation.

1. You attach a dslr with a GPU (Aplanatic) coma corrector; the latter not affecting the position of focus.
2. To focus, you find you need to rack out the focuser (away from the tube).
3. You get to the furthest point away from the tube; the focuser will not rack out any more.
4. You are still not in focus, needing several more cm outward.

15 hours ago, laser_jock99 said:

move the primary mirror closer to the secondary

Moving the primary up the tube would make matters worse:( Due to its design, I cannot use an extension tube with the cc but even if I could, I'd still end up with a dslr 15cm from the tube; flex city!

Cheers and thanks for your replies.

 

[nightfisher]

Just my childish humour

[Stub Mandrel]

Here's a small finderscope, because it is my newt.

[25585]

2 hours ago, nightfisher said:

Just my childish humour

That's a beaut of a newt

[iPeace]

Show you my what? Ah, I see... I only have the one.

TS/GSO 150mm f/6. Losmandy AZ8 on Berlebach Planet.

[Moonshane]

See if you can spot mine ?

[nightfisher]

@Moonshane now you have the large garden i hope the 16 starts to get used a lot more

[Moonshane]

Me too buddy although it slopes a bit ?

I hope to convert to a truss system at some point which will make life easier.

[iPeace]

1 hour ago, nightfisher said:

@Moonshane now you have the large garden i hope the 16 starts to get used a lot more

Still looking forward to trying a 150 f/6?

[nightfisher]

8 hours ago, iPeace said:

Still looking forward to trying a 150 f/6?

If you mean me trying one, sadly my astro spending is on hold thanks to the demise of my car, still need to get it fixed and then sell the thing, then see if i can PX the temp purchase Honda for something a little newer, so hobby spending is out  for the forseable

[iPeace]

1 hour ago, nightfisher said:

If you mean me trying one, sadly my astro spending is on hold thanks to the demise of my car, still need to get it fixed and then sell the thing, then see if i can PX the temp purchase Honda for something a little newer, so hobby spending is out  for the forseable

Yes, I read about that.

As for me, I'm enjoying this newt so much that I'm sure I'll want another, perhaps a 200mm f/6, in due course. Keeping this one a bit longer will fit in well with that.

Just waiting for the Moon to return...

[iapa]

5 Sisters ObSoS* 10” Quattro CF ready to go

* Observatory Slide off Shed

 

 

Edited February 17, 2018 by iapa

[andrew s]

All these Newts are far to pretty. This was my work horse for many years but has now passed on.

Regards Andrew 

[Stub Mandrel]

45 minutes ago, andrew s said:

All these Newts are far to pretty. This was my work horse for many years but has now passed on.

Brilliant. I like practical.

[mikeDnight]

9 hours ago, andrew s said:

All these Newts are far to pretty. This was my work horse for many years but has now passed on.

Regards Andrew 

Finally, the real thing! 

[iapa]

And in daylight

 

 

Edited February 18, 2018 by iapa

[iapa]

Sleepy time

 

Edited February 18, 2018 by iapa

[Alan White]

On 2/16/2018 at 20:30, iPeace said:

Show you my what? Ah, I see... I only have the one.

TS/GSO 150mm f/6. Losmandy AZ8 on Berlebach Planet.

And we all know just how good its being too, nice that you have joined the Newt Brigade.