ICEINSPACE
Moon Phase
CURRENT MOON
Waxing Gibbous 79.7%
|
|
05-01-2019, 01:04 AM
|
Refractors-That’s It
|
|
Join Date: Jan 2015
Location: Rangeville, Toowoomba
Posts: 440
|
|
Sky Rover 102mm f11 Achro "I'm Confused"
Had this scope given to me and used it for the first time tonight ,Baader BBHS Amici prism Zeiss spec and Nikon Nav 17mm HW not expecting much at all pointed it at the Pleiades and literally went what's that !! Pinpoint whiter than white stars and perfectly flat field with no CA? used to a feathertouch which the focuser is definitely not but ok when i got used to it ,Then went to Orion and got the same rush this is truly a serious performer up there with the ED100 and dare i say at f11 a little more and just the size of the thing is its only disadvantage if you wanted to get picky,You listen to opinion on this site and others then experience 1st hand a scope through word of mouth should not even compete, Big lesson learned this evening that's for sure.......
|
05-01-2019, 07:44 AM
|
Registered User
|
|
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 7,048
|
|
Try it on Sirius. At f11 youe getting near the point where CA drops off or can be filtered out. Are you sure there isn't a filter screwed in somewhere?
|
05-01-2019, 08:20 AM
|
Refractors-That’s It
|
|
Join Date: Jan 2015
Location: Rangeville, Toowoomba
Posts: 440
|
|
No filter Glen attached anywhere unless it’s the BBHS coatings on the amici prism
|
05-01-2019, 08:40 AM
|
|
Deprived of starlight
|
|
Join Date: Nov 2006
Location: Sydney
Posts: 3,771
|
|
Stellarvue and others sold a 102mm f/11 for a while. Altair Astro still sells one in a fancy red tube:
https://www.altairastro.com/starwave...d-focuser.html
I remember reading good reviews of the Stellarvue so your experience doesn't surprise me. Enjoy!
|
05-01-2019, 08:54 AM
|
|
Registered User
|
|
Join Date: Nov 2009
Location: Sydney
Posts: 1,193
|
|
At f11 the Achro will perform fine its the shorter focal lengths where the angle of incidence is a lot steeper that it would fall short and CA be a lot more obvious , thats where triplets come in .
|
05-01-2019, 09:14 AM
|
|
Registered User
|
|
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
|
|
Andrew,
Glad to hear your positive experience with the 102/ f11.
I have a TS102 f11, Kunming optics and I'm equally impressed.
|
05-01-2019, 11:21 AM
|
Refractors-That’s It
|
|
Join Date: Jan 2015
Location: Rangeville, Toowoomba
Posts: 440
|
|
Thanks for your replies gentlemen and it has been a spin out for me,I think with an eyepiece around 40mm 68 deg it will be excellent so i will just have to wait until something comes up.
The said Altair astro,TS planetary,Stellarvue i have had a look and the only difference is cosmetic apart from the SV that looks to have a better focuser.
As they say you live and learn........
|
05-01-2019, 12:56 PM
|
|
Registered User
|
|
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
|
|
The TS 102 has the Baader steel track Crayford— works well for me.
|
05-01-2019, 04:02 PM
|
|
Deprived of starlight
|
|
Join Date: Nov 2006
Location: Sydney
Posts: 3,771
|
|
BTW the prism diagonal is possibly improving colour correction slightly.
|
05-01-2019, 04:16 PM
|
|
Registered User
|
|
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
|
|
Based on my measurements the prism has no or very limited impact on systems >f9. I suppose that's why all the early refractors used prism star diagonals.......
|
05-01-2019, 04:54 PM
|
Refractors-That’s It
|
|
Join Date: Jan 2015
Location: Rangeville, Toowoomba
Posts: 440
|
|
I have both a mirror and the amici BBHS and for contrast ,sharpness they are unbeatable ,The T2 amici prism is a gem and would not be surprised if it has an impact on the quality of the view ,The Baader steeltrack Ken would be perfect and i am thinking it might be worth getting the adapter for my FTF
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT +10. The time is now 12:46 PM.
|
|