Go Back   IceInSpace > Equipment > Eyepieces, Barlows and Filters

Reply
 
Thread Tools Rate Thread
  #21  
Old 12-04-2016, 01:06 PM
MattT's Avatar
MattT (Matthew)
Reflecting on Refracting

MattT is offline
 
Join Date: Jul 2011
Location: Melbourne, Australia
Posts: 1,196
Quote:
Originally Posted by inertia8 View Post

I still recall when I first put the 10mm in and looked at the moon, which was at about 60% waxing, and simply marveling at the additional clarity of detail.
Begs the question what were you using before?

Matt
Reply With Quote
  #22  
Old 13-04-2016, 10:05 PM
inertia8 (Australia)
Registered User

inertia8 is offline
 
Join Date: Apr 2014
Location: Melbourne, Australia
Posts: 243
Matt, I was using the 10mm something or other that came with my little skywatcher 130p, inside an 8" Bintel Dob. In addition I had tried the 15mm GSO SuperView in an Orion Japanese Shorty Barlow.

I believe I was looking around Tycho at the ray system. They just seemed to pop out a lot more to my eye like I was suddenly viewing at a higher resolution and I spent a great deal of time examining other craters.
Reply With Quote
  #23  
Old 14-04-2016, 06:10 AM
inertia8 (Australia)
Registered User

inertia8 is offline
 
Join Date: Apr 2014
Location: Melbourne, Australia
Posts: 243
I caved in and picked up an xw5.
Reply With Quote
  #24  
Old 14-04-2016, 07:43 AM
bytor666
Anubis77

bytor666 is offline
 
Join Date: Dec 2004
Posts: 365
Quote:
Originally Posted by ab1963 View Post
I agree with the Denk 14mm over the Pentax,I bought the 13 t6 nagler for the same reason and it does a fantastic job
There's also the 14mm Delos which does not have the FC issue.
Reply With Quote
  #25  
Old 14-04-2016, 07:43 AM
bytor666
Anubis77

bytor666 is offline
 
Join Date: Dec 2004
Posts: 365
Quote:
Originally Posted by inertia8 View Post
I caved in and picked up an xw5.
Nice eyepiece!!! I have one as well.

Reply With Quote
  #26  
Old 15-04-2016, 09:43 AM
inertia8 (Australia)
Registered User

inertia8 is offline
 
Join Date: Apr 2014
Location: Melbourne, Australia
Posts: 243
Looking forward to it, been happy with the 7mm and 10mm, though my Orion Dob doesn't have a compression ring on the 1.25" adapter and I am looking to change that so I don't mark them as much.

I think the only other XW I'll look at is the 30mm, if one ever comes up in excellent condition at the right price.
Reply With Quote
  #27  
Old 15-04-2016, 12:22 PM
AG Hybrid's Avatar
AG Hybrid (Adrian)
A Friendly Nyctophiliac

AG Hybrid is offline
 
Join Date: Nov 2009
Location: Toongabbie, NSW
Posts: 1,481
Quote:
Originally Posted by inertia8 View Post
Looking forward to it, been happy with the 7mm and 10mm, though my Orion Dob doesn't have a compression ring on the 1.25" adapter and I am looking to change that so I don't mark them as much.

I think the only other XW I'll look at is the 30mm, if one ever comes up in excellent condition at the right price.
I would pass up on the 30mm XW if you dont have a coma corrector in a fast newtonian. I have tested it out a 30XW in my 12" F5 and found its outer field to be poor. Plenty of better 30mm eyepieces out there for use with fast newtonians.
Reply With Quote
  #28  
Old 15-04-2016, 03:04 PM
ab1963's Avatar
ab1963 (Andrew)
Refractors-Thatís It

ab1963 is offline
 
Join Date: Jan 2015
Location: sydney
Posts: 280
The XW10mm landed this afternoon ,lightning speed with the postage,very well packaged and hopefully i can give it a go tonight .
Reply With Quote
  #29  
Old 15-04-2016, 03:59 PM
inertia8 (Australia)
Registered User

inertia8 is offline
 
Join Date: Apr 2014
Location: Melbourne, Australia
Posts: 243
Quote:
Originally Posted by AG Hybrid View Post
I would pass up on the 30mm XW if you dont have a coma corrector in a fast newtonian. I have tested it out a 30XW in my 12" F5 and found its outer field to be poor. Plenty of better 30mm eyepieces out there for use with fast newtonians.
Thats disappointing to hear. Would you recommend the es 30mm 82deg or perhaps nagler 31mm t5?
Reply With Quote
  #30  
Old 15-04-2016, 04:08 PM
dreamstation's Avatar
dreamstation (James)
Registered User

dreamstation is offline
 
Join Date: Jun 2015
Location: Fraser Coast QLD
Posts: 130
Quote:
Originally Posted by ab1963 View Post
The XW10mm landed this afternoon ,lightning speed with the postage,very well packaged and hopefully i can give it a go tonight .
That's great to hear. Both of mine are on the way with an estimated arrival date of Monday 18th. No doubt the clouds will roll in shortly afterwards.
Reply With Quote
  #31  
Old 15-04-2016, 05:18 PM
AG Hybrid's Avatar
AG Hybrid (Adrian)
A Friendly Nyctophiliac

AG Hybrid is offline
 
Join Date: Nov 2009
Location: Toongabbie, NSW
Posts: 1,481
Quote:
Originally Posted by inertia8 View Post
Thats disappointing to hear. Would you recommend the es 30mm 82deg or perhaps nagler 31mm t5?
The 30 ES is great. If you have the cash to burn the 31 t5 is slightly better. But not 40-50% better, which is the price difference. Seroius diminishing returns with the 31 t5.
Reply With Quote
  #32  
Old 15-04-2016, 05:23 PM
janoskiss's Avatar
janoskiss (Steve H)
Registered User

janoskiss is offline
 
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,032
Quote:
Originally Posted by AG Hybrid View Post
I would pass up on the 30mm XW if you dont have a coma corrector in a fast newtonian. I have tested it out a 30XW in my 12" F5 and found its outer field to be poor. Plenty of better 30mm eyepieces out there for use with fast newtonians.
That's odd because I tried the same EP (XW-30) in 10" and 12" f/5 Dobs and found it better than Panoptics and T5 Naglers near that focal length, i.e., perfect; have not found anything better since. You sure you're not referring to the 20mm XW??
Reply With Quote
  #33  
Old 15-04-2016, 05:58 PM
MattT's Avatar
MattT (Matthew)
Reflecting on Refracting

MattT is offline
 
Join Date: Jul 2011
Location: Melbourne, Australia
Posts: 1,196
From what little I know a coma corrector for a Newtonian is the best piece of glass you can buy. My Newt has the ES HRCC in the focuser and it stays there no matter what fl is in the focuser...OK it comes out when I use my WO Binoviewers.

With the coma corrector the ES 30 82 is pinpoint edge to edge....is there anything much better than that????

Matt
Reply With Quote
  #34  
Old 15-04-2016, 06:20 PM
AG Hybrid's Avatar
AG Hybrid (Adrian)
A Friendly Nyctophiliac

AG Hybrid is offline
 
Join Date: Nov 2009
Location: Toongabbie, NSW
Posts: 1,481
Quote:
Originally Posted by janoskiss View Post
That's odd because I tried the same EP (XW-30) in 10" and 12" f/5 Dobs and found it better than Panoptics and T5 Naglers near that focal length, i.e., perfect; have not found anything better since. You sure you're not referring to the 20mm XW??
I probably should have explained further. When I said coma corrector I was thinking like a ES or Televue coma corrector which also flattens the field.
The coma was not that bad in the 30xw but the field curvature was serious. The center 60% of the field had a different focus point then the outer 40%.
Reply With Quote
  #35  
Old 15-04-2016, 06:38 PM
ab1963's Avatar
ab1963 (Andrew)
Refractors-Thatís It

ab1963 is offline
 
Join Date: Jan 2015
Location: sydney
Posts: 280
Just tried out the XW 10 in my SV80 ,astounding is the only word for it,snaps into focus beautifully,razor sharp ,contrast perfect for me and doesn't behave any differently with the 2.5x powermate ,very happy
Reply With Quote
  #36  
Old 15-04-2016, 07:26 PM
janoskiss's Avatar
janoskiss (Steve H)
Registered User

janoskiss is offline
 
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,032
I recall no FC issue with the XW 30mm at f/5 (no coma corrector) but that was at one star party long ago. It was a head-to-head with the T5 31mm and on that night I decided that the XW-30 was a clear winner and if I ever get a 30-ish mm premium widefield it will be that (never happened). The XW 20mm and 14mm are the only ones I recall as showing significant FC.
...
Yeah, most coma correctors act as field flatteners also.
Reply With Quote
  #37  
Old 15-04-2016, 09:35 PM
ausastronomer (John Bambury)
Registered User

ausastronomer is offline
 
Join Date: Mar 2005
Location: Shoalhaven Heads, NSW
Posts: 2,437
Quote:
Originally Posted by ab1963 View Post
Just tried out the XW 10 in my SV80 ,astounding is the only word for it,snaps into focus beautifully,razor sharp ,contrast perfect for me and doesn't behave any differently with the 2.5x powermate ,very happy
I have used just about all of the best astronomical eyepieces made, or available, over the last 50 years, in many different types, F-Ratio and aperture telescopes. That includes eyepieces like the 30mm Leitz, 12.5mm Docter, Zeiss Abbe's (series I & II), Nikon NAV HW, Nikon orthoscopics, TMB Supermonos, Astrophysics SPL, Pentax XL, XO, XP and XW, Vixen LVW, Takahashi LE, 14mm & 21mm Denkmeiers, everything Meade and Celestron have sold and everything Televue has ever produced, excepting the recently released Delite series. I have also used the coma correcting Pretoria eyepieces, made years ago by University Optics.

I rate the 3.5mm, 5mm, 7mm and 10mm Pentax XW's as 4 of the absolute very best general use astronomical eyepices made in the last 50 years, at any price. I am sure those people who have purchased any of these 4 eyepieces will be very very happy with them. The discounted price is just cream on the cake.

Cheers
John B
Reply With Quote
  #38  
Old 15-04-2016, 10:03 PM
janoskiss's Avatar
janoskiss (Steve H)
Registered User

janoskiss is offline
 
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,032
Well said, John. I sold my XW's somewhat regrettably (but at the time I really needed the money), and now I'm considering reacquiring the 10mm XW or similar. Have you much experience and please would you comment on the Nikon NAV-SW 10mm?
Reply With Quote
  #39  
Old 19-04-2016, 03:02 PM
dreamstation's Avatar
dreamstation (James)
Registered User

dreamstation is offline
 
Join Date: Jun 2015
Location: Fraser Coast QLD
Posts: 130
Quote:
Originally Posted by ab1963 View Post
The XW10mm landed this afternoon ,lightning speed with the postage,very well packaged and hopefully i can give it a go tonight .
DHL shipped my pair of eyepieces from Japan to Sydney and finally to Brisbane in 3 days where they passed it on to Australia Post for the final 250km of the journey. They've now been sitting in the Underwood facility since Sunday with an estimated delivery date of Thursday... How can one mob get it so right and the other so wrong.
Reply With Quote
  #40  
Old 19-04-2016, 03:54 PM
janoskiss's Avatar
janoskiss (Steve H)
Registered User

janoskiss is offline
 
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,032
That's the difference between much of Asia and 'she'll be right mate, I'll do it when I can be bothered getting off my bum' Australia. In Melbourne I am used to stuff arriving from Hong Kong quicker than from Sydney. Even pick-up orders within Melbourne can take longer to be ready.
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 05:25 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
OzScopes Authorised Dealer
Advertisement
SkyWatcher WiFi Adaptor
Advertisement
Lunatico Astronomical
Advertisement
NexDome Observatories
Advertisement
Interest Free Finance
Advertisement
SkyWatcher 2018 Catalogue
Advertisement
Astronomy and Electronics Centre
Advertisement