T-Threaded 2X barlow Lens

For all of you who use a SLR or DSLR for astrophotography you might be interested in this! I my self am going to buy one! I know Antares are of good quality!

cgi.ebay.ie/Telescope-accessory-Antares-...QQrdZ1QQcmdZViewItem

Also doubles as a normal 2X barlow lens! Ahen...Macros42/Steve...ahem..
Excuse me, i have a cough!
Matthew Cahill

Matthew,

I went to the scopesnskies website and found the following:
Fabulous Antares 1.25" eyepiece and accessory kit
www.scopesnskies.com/show_product.php?id=57

(around €130)

You were saying Antares are of good quailty, is this worth the price ???
Have you used Antares eyepieces before ??

Also a little off the topic on the same site I saw this:
Bresser Action 20x50 high powered bino
www.scopesnskies.com/special_offers.php

not bad for £24.99 (around €37 )!!!

No i have never used an antares eyepiece(yet). I do intend to buy from them though! The quality is quite good ive heard!

Hi guys

I purchased a 32mm, a 10mm and a X2 barlow from these. I am very happy with the 32 mm and the barlow, the 10mm is ok but not great, but when used with the barlow, it is still much better than the 6mm that came with the skylux.
I would have no problems reccommending the 32mm or barlow. I would possibly check other options for a 10mm. Although for that money it is hard to complain

I am now eagerly awaiting the arrival of a 20mm and 6mm Orion expanse eyepiees from Kendrick astro instruments and as soon as these arrive, hopefully tomorrow. The 6mm from the skylux will be heading for the nearest bin.
www.kendrickastro.com/astro/index.html

this is from this link
www.irishastronomy.org/boards/viewtopic.php?t=3117

130 euro does seem very reasonable to me! Its a perfect starter kit!
I already have 3 soligor plossls(25mm,9mm,4mm) So im looking for lesser magnification eyepiece like a 32mm and a 40mm,aswell as a barlow lens, so ill prob. buy them singly!

I bought the meade 10X50mm in lidl and i found them fantastic!
As you probably know Bresser are a very well known brande! But one thing you should consider is the weight as if there very heavy theyll need a sturdy tripod or a very steady hand! But for 37 euro you cant go wrong! Maybe the more experienced astronomers can help you better than i can!
Hope i helped somewhat,
Matthew C

Then again this might be of better quality! Not much more expensive and it is a better and widely known brand name(celestron)
www.adorama.com/CNAK.html?searchinfo=celestron&item_no=1
Matthew C

Re. the 20x50's:

A good rule of thumb is that when you divide dia. by mag., you should aim for a factor of ~5, as in 10 x 50's.

This means you get a clearer image, wider fov etc. Basically, the ratio of mag. power to diam. is good. (Hope I have the theory right )

Now 50/20 = 2.5, which is well off the ideal 5.

While this might be a prob for terrestrial work, for astro work, it mightn't be so. Just to be aware...

...bur for €37, I think it's worth the chance

When it comes to optical accessories you usually get what you pay for.
Lets presume firstly that this barlow is average, not spectacularily good nor bad, so what would you expect??

I'd imagine firstly you'll get some sort of chromatic abberation, the severity of this could be anything from hardly noticable to strangely coloured stars.
You could also end up with comet type stars near the edge of the field fo view.

Only time and use will tell, all the same for that price, it is worth the risk.