ICEINSPACE
Moon Phase
CURRENT MOON
Waxing Gibbous 72.3%
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15-10-2006, 06:42 PM
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Registered User
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Join Date: Oct 2006
Location: Adelaide
Posts: 658
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6" dob accessories?
hey guys,
i only got my first dob a week or so ago and so far its been pretty good.
ive been debating over what filter/s etc to compliment it.
anyway this is what ive looked at so far..
Astronomik UHC 1.25"
Lumicon O-III 1.25"
im trying to keep a budget so its either going to be 2 filters like the above and a barlow or 1 filter a barlow and an ep
i was also looking to add a barlow and another semi decent ep.
suggestions as to what would be best appreciated
thanks,
Tj
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15-10-2006, 06:55 PM
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Vagabond
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Join Date: Sep 2005
Location: China
Posts: 1,477
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I would recomend an OIII filter. I have a Lumicon OIII filter and on nebulae and planetery nebulae it is in two words, bloody fantastic.
Cheers, Mick
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15-10-2006, 07:46 PM
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Compulsive Tinkerer
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Join Date: Jan 2005
Location: Blue Mountains, NSW
Posts: 1,766
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Welcome to IIS Mono
As for your question I would go a bit easy on the filters with a 6". These filters restrict the light and this combined with the light gathering capacity of a 6" may not give the desired result (dark images). I would vote for a good mid-range eyepiece and barlow and some dark skies.
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15-10-2006, 08:13 PM
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Registered User
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Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,033
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I agree with Rob. Nebula filters are more useful on larger scopes. I'd spend the money on eyepieces and other accessories instead. If you want a nebula filter the DGM NBP is a very good general purpose one and won't break the bank.
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15-10-2006, 09:42 PM
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Vagabond
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Join Date: Sep 2005
Location: China
Posts: 1,477
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I use my OIII filter on a 120mm (4.7") refractor and it works a treat
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15-10-2006, 10:14 PM
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Registered User
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Join Date: Oct 2006
Location: Adelaide
Posts: 658
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thanks for the input guys,
id say ill end up getting both filters + a barlow and mid range ep, considering that they will still be useful if/when i go bigger. just interested in what people of the same/smaller arpeture are using to get good results, as most reviews ive seen really arent worth the time reading them (well as far as im concerned) when you see that the review was conducted with a scope that would cost as much as a new car (and probably just as big).
i suppose i better start with some dob mods soon too
already dealt with the az motion, buttery smooth now.
anyone recommend a good ep thats not gonna make my wallet cry?
i have the 2 that came with the dob, a 10mm and a 25mm super wide
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15-10-2006, 10:31 PM
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Vagabond
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Join Date: Sep 2005
Location: China
Posts: 1,477
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Quote:
Originally Posted by monoxide
thanks for the input guys,
id say ill end up getting both filters + a barlow and mid range ep, considering that they will still be useful if/when i go bigger.
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Thats a good point. My eyepieces and filters stay with me thru my astronomical journey
Quote:
Originally Posted by monoxide
anyone recommend a good ep thats not gonna make my wallet cry? i have the 2 that came with the dob, a 10mm and a 25mm super wide
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I good high quality e/p that wont break the bank is something like a Televue plossl. premium quality eyepieces for approx $145 from Bintel. The eyepieces that came with your scope are not too bad tho, particually with your instrument.
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16-10-2006, 05:00 AM
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Sir Post a Lot!
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Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,760
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I can recommend the TMB/Burgess planetary eyepieces. They are great value at less than AU$150, have plenty of eye relief, a big lens and are very sharp to the edge with good FOV.
I recently got the 5mm version and love it.
btw welcome to the site! How did you hear about us?
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16-10-2006, 07:22 AM
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Compulsive Tinkerer
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Join Date: Jan 2005
Location: Blue Mountains, NSW
Posts: 1,766
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Think about a 15-16mm range plossl (Televue, Meade, Celestron, etc). This combined with a 2x barlow will give you a great range of magnifications.
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16-10-2006, 07:26 AM
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Registered User
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Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,033
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Quote:
Originally Posted by monoxide
anyone recommend a good ep thats not gonna make my wallet cry?
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17mm Hyperion from MyAstroshop or Stratus from Bintel would be a good general purpose DSO EP for your scope. If that's too dear then maybe GSO Superview 15mm and 20mm from Bintel/Andrews/AOE (real cheap but I did not like them at f/7.5) or maybe the Expanse clones that MyAstroshop sells as LE wide angles.
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16-10-2006, 07:47 AM
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Registered User
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Join Date: Mar 2005
Location: Melbourne
Posts: 1,013
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Welcome to IIS Mono..
I'm assuming that this being your first Dob..it is also your first reflector telescope?..if so..have you put a few bucks aside for collimation tools?...and to keep your EP's clean..canned airbrush from an electronics store will remove most off the dust..then use a lenspen and very gently move it side-to-side to finish off...for fingermarks...it would be worthwhile to purchase a small bottle of isopropyl alcohol from the local Pharmacy to clean off any fingermarks by using a rolled-up corner of a tissue soaked in alcohol and using the weight of the tissue only...gently remove the fingermark then allow to dry..this is after using canned airbrush to remove the dust!..and remember you only need to clean them when the image is affected....the same goes for the mirrors....if it looks dusty...leave it for a year then look again..unless it has something spilt on it or the image is greatly affected...then clean them only if you know how!!
Forgive me if sound too harsh..but I know some first-time dob owners..(myself included)..who worried about dust on mirrors...etc!
Congratulations on your new scope and I wish you many years of enjoyment!!
Cheers!
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16-10-2006, 12:41 PM
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Registered User
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Join Date: Oct 2006
Location: Adelaide
Posts: 658
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hmm, yeah its my first reflector. graduated from a craptastic refractor.
i noticed a few bits of dust or something on the mirror but the thought of cleaning it just doesnt sit well with me
i ended up ordering an astronomik uhc, lumicon O-III, a barlow and a laser collimator.
i guess id rather save and get a few decent ep's rather than skimp now just to add another average one.
thanks for the help guys
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16-10-2006, 05:40 PM
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Vagabond
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Join Date: Sep 2005
Location: China
Posts: 1,477
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You will have a ball with your set up enjoy.
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18-10-2006, 01:43 AM
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Space Explorer
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Join Date: Mar 2006
Location: Caloundra, Sunshine Coast, Australia
Posts: 1,571
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Sirius Optics currently advertising the entire Orion Stratus range (68° field of view) for $125 each.
Bargain!
Great ep.
Cheers!
Steve
(Orion Stratus owner)
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18-10-2006, 09:02 AM
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Registered User
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Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,033
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That would be a bargain. I bet they don't have many. Probably just a few factory seconds/blems.
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18-10-2006, 04:05 PM
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Tasmania
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Join Date: Sep 2006
Location: Australia - Hobart
Posts: 727
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I rang Sirius Optics...
...and unfortunatly it was a miss print. They are selling them for $245.
bummer
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18-10-2006, 06:17 PM
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Registered User
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Join Date: Oct 2006
Location: Adelaide
Posts: 658
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ehe, i just read that thread before seeing this
ah not to worry i guess..
weather was a bit dodgy yesterday so i ended up putting alt/az guides on, seems a bit dodgy tonight too but should be good enough to check my accuracy
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19-10-2006, 06:38 PM
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Registered User
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Join Date: Oct 2006
Location: Adelaide
Posts: 658
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ok so when i posted that i had put that order through i hadnt clicked confirm yet, i mulled it over for a few days and ended up coming out with this:
Baader UHC-S nebula filter
Vixen LV25
Vixen 2x T-threaded barlow
and an #82A wratten
apparently the baader uhc is a bit more forgiving for smaller arpeture scopes, the ep/barlow should also serve me well
only thing i really wanna chase down now is an 8mm ep for planetary observing (barlowed when the seeing permits) i saw GSO ep's are real cheap, does this reflect their quality? if they are half decent i wouldnt mind starting a 2" collection
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19-10-2006, 07:14 PM
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Registered User
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Join Date: Jan 2005
Location: Sale, VIC
Posts: 6,033
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Tj, I have to say that I've never used that particular LV but I don't see much point in paying so much for an LV 25mm. A 25mm Plossl will give you the same FOV and similar eye relief. So either save some cash and grab a 25mm plossl for less or get yourself a widefield EP. Some options: GSO Plossl for a fifth of the price, Antares Elite for 1/2 price, Televue Plossl for 3/4 (all worth the price). But for your scope at the price level of the 25mm LV I'd be looking at the 17mm Hyperion. It would be a great general purpose eyepiece for the 6" Dob, with a very nice much wider apparent FOV and only little less true FOV. Would work a treat at f/8.
As for the 8mm, that is where an LV could serve you well. Or you could again go another Hyperion. But I would not expect you'd get much out of it in a barlow - too much power. Better off with a 12-13mm IMO. 13mm Hyperion perhaps. Would make a great second closer-look DSO EP too. If you can spare the extra $$ for LVWs, they are worth it too. Don't forget to haggle for best price.
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19-10-2006, 07:19 PM
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4000 post club member
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Join Date: Sep 2004
Location: Melbourne
Posts: 4,900
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8mm will be a bit low lowered on planets, and overly high powered when barlowed IMO.
Assuming your dob has a focal length of 1200mm , you should aim for a 12mm eyepiece to give around 100x native which is good for dso's, and 200x for planets and the moon.
Maybe a 13mm Stratus or Hyperion would be the go.
Edit: Steve just beat me to it
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