ICEINSPACE
Most Read Articles
Moon Phase
CURRENT MOON Waxing Gibbous
90.5%
The Sun Now
Time Zones
Sydney
8:33 am
Perth
6:33 am
Auckland
10:33 am
New York*
6:33 pm
Paris*
12:33 am
GMT
10:33 pm




Go Back   IceInSpace > Equipment > Eyepieces, Barlows and Filters

Reply
 
Thread Tools Rate Thread
  #1  
Old 23-10-2006, 02:10 PM
davewaldo's Avatar
davewaldo
SE QLD

davewaldo is offline
 
Join Date: Sep 2006
Location: Australia - Brisbane
Posts: 727
Upgrade from Andrews 30mm UWA 80 degree EP

Hi All.

I'm keen to find out what you guys think would be a better EP than the Andrews 30mm UWA 80 degree EP. I have a F5 dob and I don't really like the level of aberations in the Andrews EP.

I havn't bought any EP's yet (I still have the basic GSO possls which came with my dob) but I think the Andrews EP is a bit expensive if I'm just going to want to upgrade latter.

I have thought about the Stratus 30mm but it only has a 68 degree field.

So is there a better EP for under $350?

Cheers

Dave.
Reply With Quote
  #2  
Old 23-10-2006, 02:26 PM
janoskiss's Avatar
janoskiss (Steve H)
Registered User

janoskiss is offline
 
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,032
"... but it only has a 68 degree field." - geez talk about a bad case of FOV gluttony. If you want an ultrawide around 30mm that works well at f/5, you're going to have so spend considerably more than $350. The 28mm UWAN is one of the least expensive options around but even that is closer to $500. The 30mm "Andrews" aka 1rpd will give you only about 60 degrees of usable FOV.
Reply With Quote
  #3  
Old 23-10-2006, 02:44 PM
davewaldo's Avatar
davewaldo
SE QLD

davewaldo is offline
 
Join Date: Sep 2006
Location: Australia - Brisbane
Posts: 727
I could eat FOV all day!!!!

haha I love the emersed feeling. But I also like a well corrected image.

I am a photographer and I notice poor image quality quickly and it does annoy me. So perhaps a 30mm Stratus would be the better option. I have been quoted $245 for one of these 2" Stratus EPs from bintel.

I could always remove the bottom section and then barlow it in a UO 2" barlow (which I plan to be my second purchase).... This would then give me a wider FOV?

What do you think of this option Janoskiss?

Cheers.
Reply With Quote
  #4  
Old 23-10-2006, 02:57 PM
janoskiss's Avatar
janoskiss (Steve H)
Registered User

janoskiss is offline
 
Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,032
I don't know the 2" Stratuses and whether they have a removable half like the 1.25"s (but probably no).

You could always wait for John B to sell you his 27mm Panoptic as he upgrades to the 30mm XW.
Reply With Quote
  #5  
Old 23-10-2006, 03:57 PM
Satchmo's Avatar
Satchmo (Mark)
Registered User

Satchmo is offline
 
Join Date: Dec 2005
Location: Sydney
Posts: 1,858
Quote:
Originally Posted by davewaldo
Hi All.

I'm keen to find out what you guys think would be a better EP than the Andrews 30mm UWA 80 degree EP. I have a F5 dob and I don't really like the level of aberations in the Andrews EP.

.
Hi Dave

You'll have to spend upwards of $1000 for a 31mm Nagler to improve the edge performance in an F5 . At 40mm field diameter the coma and astigmatism is getting severe. But then the field of view is great, I recommend putting a cardboard mask with 7.5" hole over the front , not as much light but the Andrews 30mm will be much sharper at the edge and you'll gain all that extra sharp field at effectively F7.

Mark
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 08:33 AM.

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