View Full Version here: : GSO 30mm review
Starkler
16-02-2005, 09:48 AM
Well Mr "I want a review of your ortho" , how about a detailed review of the 30mm GSO superview ? :P
Im sure many people are interested in this eyepiece.
theres a detailed review of this EP on the iceinspace review page and i did a newbies review in the equipment forum comparing it to a celestron 32mm 1.25 inch.
so there :P
Mwahahaha!
iceman
16-02-2005, 10:35 AM
The detailed review is for the 42mm, not the 30mm! And I think us f/5 owners would like to see a review of it done in an f/5 scope!
Starkler
16-02-2005, 10:53 AM
I created this thread for somewhere to move some posts that were hijacking another thread , sorry about that.
While we are here, would any owners of the GSO SV 30mm eyepiece care to write up a review? This eyepiece seems to be commonly recommended to owners of gso dobs and a comprehensive review would be very welcome.
iceman
16-02-2005, 10:54 AM
I agree, i'm hoping to get one from Lee @ Andrews so that I can perform a review too.
Starkler
16-02-2005, 11:19 AM
Thread surgery complete . I think I created a Frankenstein !
iceman
16-02-2005, 11:51 AM
yes you can, just go to "split thread" option.
*cough (http://www.iceinspace.com/forum/showthread.php?s=&threadid=639) *
sorry, I am not an expert but I tried to write as much as i could in there :(
Striker
16-02-2005, 12:49 PM
Well as you know I have the GS superviews in the 30mm,42mm and 50mm....but I aint doing any reviews as I am not qualified.....one thing I will say...dont bother with the 50mm...not because of performance but what the hell would you use it for if you have 42mm.....
2" GS 50mm for sale...expect to see this one on ebay soon....lol
for widefield 24x veiwing? tried looking at large clusters with it yet like beehive or plieades?
Ive run out of room in my case :(
jackenau
16-02-2005, 09:50 PM
Having recently purchased (yesterday) a 30mm GSO superview for use with my 12" dob, I was at first a little dissapointed.
Don't have much to compare it to. First view after having the scope set up for about an hour gave you those seagull effects that you read about around the outer image and nothing different to really write home about when comparing with a standard 26mm meade plossl (I actually preferred the meade), apart from a wider field of view.
However after leaving the scope for around another hour or so the views improved out of site, and that seagull effect dissapeared altogether.
Got up early this morning around 5.30 for a quick view of Jupiter after leaving the scope set up all night and the view was by far the best yet.
Definately much clearer images in fov once the scope or setup has cooled down.
KenM
Starkler
16-02-2005, 10:02 PM
Interesting observation . Are you sure its the extra cooling of the scope or could it have to do with your eyes being dilated to a different degree ? (more or less light adapted).
Last weekend comparing eyepieces with Dave I was seeing coma where he was seeing none. It seems our eyes behave differently and there can be more variables at play than just the optics of the scopes and eyepieces.
ballaratdragons
16-02-2005, 10:12 PM
I found with my GS 30mm SV that seagulls flew all around 30% of the perimeter stealing my hot chips.
Then after leaving it out of the case for about half an hour the seagulls had flown away. Methinks it needs cooling as much as the scope does.
Once the SV cooled down it was magnificent. Excellent eye relief and it looks impressive when the visitors come!
I won't be getting rid of mine in a hurry, if ever.
jackenau
16-02-2005, 10:35 PM
Interesting question Starkler and I am not quite sure, however my scope is normally setup outside with covers on etc. and in this instance, after about a 60 minute exposure to the elements for the scope with covers off, I had a few quick views and was a little dissapointed. Checked against the standard 26mm plossyl and found the plossyl to be slightly better. However, I left the 30mm in, went back inside and checked out the forum, (as one does), and after about another hour went outside to check the views. I have dimmers in the house and was viewing a computer screen, so my eyes were obviously affected by light.
The views were by far superior to what I had previously witnessed. ( I had been looking at Saturn mainly and M42).
So I can only assume that the increased cooling down time had something to do with this, as were my views earlier this morning when observing Jupiter
I believe the other Ken has made the same observation.
Ken M
Starkler
16-02-2005, 10:54 PM
Really weird. I have never heard of an eyepiece needing cooling time :shrug:
jackenau
16-02-2005, 11:09 PM
Me too! I only state what I observed. The other noticeable thing with this eyepiece on my 12" dob was, that you could actually feel the eyepiece pushing on the focuser if you hold on to the eyepiece focussing knob, causing it to go out of focus quickly.
If you hold onto the focusser knob it stops this problem. Mine might be a little too easily fine tuned, but I haven't touched it since receiving the scope just before xmas.
Is not a real problem if you are aware of it.
Ken M
ballaratdragons
16-02-2005, 11:12 PM
Either have I, but it works!
My scope had been cool for about 4 hours so it wasn't the mirror cooling.
ballaratdragons
16-02-2005, 11:16 PM
Ken M, Do you have the GS rack & pinion or a Crayford focuser? There is a major difference.
I have the Crayford and even when I accidently bump into it hard with my glasses it doesn't move.
jackenau
16-02-2005, 11:23 PM
The GS rack & pinion, it is ever so smooth, perhaps a little too smooth. (MAYBE ITS A KEN THING)
Ken M
ballaratdragons
16-02-2005, 11:29 PM
Yep, we Ken's are smooth.
The Crayford has an adjuster on it like a little clutch that sets the pressure so it won't move easily. I have mine set so it won't move unless I turn the focuser knob, and it is reeeaaaalllll smooooooooth!
They are cheap at the moment from one of the shops in Sydney.
Cool, I'm glad I got the 30 mm SV. Now if only my bank transfer would actually arrive at Andrew's...
Stupid banks.
ballaratdragons
16-02-2005, 11:40 PM
Don't worry,
Nothing to look at in this weather anyway.
iceman
17-02-2005, 05:57 AM
jackenau, I had that problem with the R&P focuser.. maybe you can try tightening the 4 adjustment screws on the front of the focuser, or the 1 black plastic screw on the back.
They will make focusing a little stiffer, and won't push you out of focuser if you lean your eyeball on the eyepiece.
RAJAH235
17-02-2005, 03:55 PM
Just an observation re; the E/P cooling down. Does this mean that my heated E/P box is superfluous? ;) ;)
ballaratdragons
17-02-2005, 05:45 PM
:lol2:
Probably.
At least a quick blow with a hair dryer doesn't heat the EP too much.
gbeal
17-02-2005, 06:11 PM
A heated eyepiece box is a luxury. I normally "store" my spare(s) in my jacket pocket(s), where they receive a little warmth.
Starkler
17-02-2005, 06:48 PM
and lots of lint :D
Kids dont try this without the caps on !
The eyepiece needs to be at a spatially constant temperature, so having a heated eyepiece is fine as long as the whole thing stays at the heated temperature.
If you are heating it in a box and then putting on the scope without heating you might have the problems that people described earlier.
Edit: Of course, this is assuming that the cooling down image improvement isn't our minds tricking us.
jackenau
17-02-2005, 09:32 PM
Thanks for the hints Iceman. I have adjusted the 4 screws before and this did alleviate the problem, never gave it a thought until now with the more weightier eyepiece. Re-tightend the screwsa and locktighted has solved the problem. Never really looked for the black plastic screw on the front. (mainly because it wasn't there). found the hole and have inserted a locking screw, which locks the ep into place.
Thanks for the assistance.
Ken m
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