#1  
Old 06-07-2015, 05:55 PM
Paul Haese's Avatar
Paul Haese
Registered User

Paul Haese is offline
 
Join Date: Jan 2009
Location: Adelaide
Posts: 9,937
For people wanting a fast Newtonian

I came across this link today and thought I might drop it here for people looking to spend some loot on an imaging Newt.

http://www.telescopeshercules.com/

The scopes look really nice I must say.
Reply With Quote
  #2  
Old 06-07-2015, 06:09 PM
rustigsmed's Avatar
rustigsmed (Russell)
Registered User

rustigsmed is offline
 
Join Date: Mar 2012
Location: Mornington Peninsula, Australia
Posts: 3,950
they look pretty awesome, i like it when you start using metres rather than cm's! the 0.6m would need a serious mount!
i see the 0.5m just scrapes in under the eq8's payload! haha

i wonder how well they hold collimation at f/3.2. they look might fine (and expensive!)
Reply With Quote
  #3  
Old 06-07-2015, 06:16 PM
LewisM's Avatar
LewisM
Novichok test rabbit

LewisM is offline
 
Join Date: Aug 2012
Location: Somewhere in the cosmos...
Posts: 10,388
I think the price was pretty reasonable. SERIOUS instruments.

Look like a better Officina Stellare
Reply With Quote
  #4  
Old 06-07-2015, 06:19 PM
gregbradley's Avatar
gregbradley
Registered User

gregbradley is offline
 
Join Date: Feb 2006
Location: Sydney
Posts: 17,877
Gorgeous looking scopes. I guess they need some example images from out in the field to validate them.

Greg
Reply With Quote
  #5  
Old 06-07-2015, 06:21 PM
LewisM's Avatar
LewisM
Novichok test rabbit

LewisM is offline
 
Join Date: Aug 2012
Location: Somewhere in the cosmos...
Posts: 10,388
I think they need some Aussie beta-testers. Reckon my GPD2 will hold the 600?
Reply With Quote
  #6  
Old 06-07-2015, 07:13 PM
RickS's Avatar
RickS (Rick)
PI cult recruiter

RickS is offline
 
Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
I was in Quebec a couple of weeks ago. If I'd known I would have dropped in!

Cheers,
Rick.
Reply With Quote
  #7  
Old 06-07-2015, 07:52 PM
peter_4059's Avatar
peter_4059 (Peter)
Big Scopes are Cool

peter_4059 is offline
 
Join Date: Jun 2007
Location: SE Tasmania
Posts: 4,532
They seem pretty heavy - 28kgs for the HTN300. I thought carbon fibre was supposed to be light?
Reply With Quote
  #8  
Old 06-07-2015, 08:02 PM
rustigsmed's Avatar
rustigsmed (Russell)
Registered User

rustigsmed is offline
 
Join Date: Mar 2012
Location: Mornington Peninsula, Australia
Posts: 3,950
Quote:
Originally Posted by peter_4059 View Post
They seem pretty heavy - 28kgs for the HTN300. I thought carbon fibre was supposed to be light?
Yeah I think my steel rolled gso 12" is 21kgs
Reply With Quote
  #9  
Old 07-07-2015, 02:40 PM
Geoff45's Avatar
Geoff45 (Geoff)
PI rules

Geoff45 is offline
 
Join Date: Jul 2006
Location: Sydney
Posts: 2,631
I hope their optics are better than their spelling and grammar!
Scopes look good. I'd go for the 600mm f3.8--fast + good image scale at 2280mm focal length.
Geoff
Reply With Quote
  #10  
Old 07-07-2015, 03:30 PM
gregbradley's Avatar
gregbradley
Registered User

gregbradley is offline
 
Join Date: Feb 2006
Location: Sydney
Posts: 17,877
Quote:
Originally Posted by ghsmith45 View Post
I hope their optics are better than their spelling and grammar!
Scopes look good. I'd go for the 600mm f3.8--fast + good image scale at 2280mm focal length.
Geoff
Yes it sounds good but I wonder if there is a reduced rate of gain of aperture at F3.8. Longer F ratios and larger aperture for sure gives a gain but I am not so sure that is the case for an F3.8. I can't point to any definite evidence beyond some 20 inch Newt images I have seen that were so so. Perhaps the Newt type of scope has sweet spots in aperture for average seeing, flex problems and length/size/weight. Newts get quite long. I wonder how that truss system holds up when they get that long, big and heavy.

Greg.
Reply With Quote
  #11  
Old 07-07-2015, 04:09 PM
Atmos's Avatar
Atmos (Colin)
Ultimate Noob

Atmos is offline
 
Join Date: Aug 2011
Location: Melbourne
Posts: 6,980
I am thinking that I would prefer the RC design over a newt when getting to these kinds of apertures, for the reasons that Greg has brought up. The RC, CDK & Honders designs allow for structurally more stable mounting with less reinforcement, to an extent of course. The non primary end of these telescopes is only holding the secondary mirror as opposed to having to withstand the entire imaging weight which can become quite heavy very quickly!
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 08:23 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
Bintel
Advertisement