what reducer do i need ?

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what reducer do i need ?

Postby rhys19 » Mon May 31, 2010 1:43 pm

hi all im new to this and looking forward to start searching the sky,just purchased a skymax 127 supatrak and was told that it would be best for planterium viewing,i also want to view deep sky things such as galaxies and so on,anyone know what reducer i would need and if its simple to add-on or change so i can start viewing deep sky ?
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RE: what reducer do i need ?

Postby Chanctonbury » Mon May 31, 2010 2:50 pm

The 127 should be fine for many Galaxies as these are relatively small in the eyepiece, it is nebulae that will require some focal length reduction because they tend to be pretty large.
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RE: what reducer do i need ?

Postby rhys19 » Mon May 31, 2010 3:06 pm

ok thanks so what focal reduction would i need for the nebulaes as i want to get the best out of my scope

many thanks
Rhys.
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RE: what reducer do i need ?

Postby pmwright » Mon May 31, 2010 3:56 pm

The simplest focal reducer you can buy is this one [url=http://www.rothervalleyoptics.co.uk/antares-1-25-inch-0-5x-focal-reducer_d1921.html]Antares 0.5x focal reducer[/url], it screws into the filter thread of the eyepiece reducing the focal length of the telescope by 0.5x. Other types of reducer screw into the visual back of the telescope and then the diagonal / camera is attached to the reducer.

Peter
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RE: what reducer do i need ?

Postby rhys19 » Mon May 31, 2010 4:30 pm

ok thanks peter ill have a look and get back to you on how it goes.
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RE: what reducer do i need ?

Postby philip pugh » Sat Jun 05, 2010 4:30 pm


[quote]ORIGINAL: pmwright

The simplest focal reducer you can buy is this one [url=http://www.rothervalleyoptics.co.uk/antares-1-25-inch-0-5x-focal-reducer_d1921.html]Antares 0.5x focal reducer[/url], it screws into the filter thread of the eyepiece reducing the focal length of the telescope by 0.5x. Other types of reducer screw into the visual back of the telescope and then the diagonal / camera is attached to the reducer.

Peter
[/quote]

I'll second that!

Also add a 32mm Plossl and a light pollution reduction filter and you should be able to catch all the Messier objects, weather permitting.

The Skymax 127 is a very good telescope and I really enjoy using mine.
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RE: what reducer do i need ?

Postby philipc » Sat Jun 05, 2010 9:13 pm

[quote]ORIGINAL: Philip Pugh
I'll second that!
[/quote]

Glad to hear that - I just picked up an AE 1.25" 0.6x reducer in the SnS Astroboot for £10. Thought it might come in handy.
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RE: what reducer do i need ?

Postby rhys19 » Thu Jun 10, 2010 7:50 pm

thanks alot guys big help,i struggled with the scope at 1st but now i find it quite easy to use,just a shame the damm weather ruins it,going to order the reducer and light pollution filter soon and will let you know how i get on
thanks once again
Rhys.
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Re: RE: what reducer do i need ?

Postby SkyWatcher17 » Tue Dec 06, 2016 4:46 pm

philip pugh wrote:
ORIGINAL: pmwright

The simplest focal reducer you can buy is this one Antares 0.5x focal reducer, it screws into the filter thread of the eyepiece reducing the focal length of the telescope by 0.5x. Other types of reducer screw into the visual back of the telescope and then the diagonal / camera is attached to the reducer.

Peter


I'll second that!

Also add a 32mm Plossl and a light pollution reduction filter and you should be able to catch all the Messier objects, weather permitting.

The Skymax 127 is a very good telescope and I really enjoy using mine.


I have an Antares 0.5x reducer and it states that it reduces by 40% on the RVO page. Which is where I'm a little confused. I have a 102mm Skymax and if I put a 32mm eyepiece into the focuser it will give me 40.625x.

So if the focal length of the scope is halved (50%) the same eyepiece will produce 20.31x with the reducer threaded into the eyepiece.

If, on the other hand, the scope focal length is reduced by 40% it will give 24.375x.

The difference isn't much, but at very low magnifications it may be more relevant.

Which do you think is the correct magnification? Thanks.
Sky-Watcher Explorer 130M, EQ5 Deluxe, AZ5 Deluxe, SkyMax 102mm, SkyMax 127mm, Orion/SW ST80s (both modified), Vixen Porta II/Vixen SXG Hal-130, Orion 90mm StarMax , Celestron NexStar Evolution 9.25", TS Optics/GSO: SVD series 150mm, f/6.
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