coma corrector for F/5 Newton

[NorthernLight]

Hello Everybody,

does anybody know where in New Zealand or Austrlia I can buy a coma corrector for my F/5 Newton?

I searched the web but could only get results from Itally and Germany.
Nothing at Andrews or Bintel or NZ shops.

Look forward to your replies.

Cheers

[sopticals]

Have a look on "Trade me" under telescopes. GSO Coma Corrector is listed.

[multiweb]

You'll need a Baader MPCC. Very easy to find, even second hand. They're very popular.

[pixelsaurus]

Astronz in Auckland are usually cheaper than TradeMe.

http://www.astronomy.co.nz/shop/item.aspx/coma-corrector/114/

[NorthernLight]

many thanks for your replies. I shall give trade me a go. The AstroNZ one is F4 or faster unforrunately. But I might ask Andrew to let me try one. Thanks again, guys!

[Satchmo]

The GSO one is great value but you need to extend the design focal plane by 19mm to optimise it - GSO didn't engineer the tube correctly . There's a massive thread on Cloudy Nights on the subject .

[NorthernLight]

Hi Mark, thanks for the info. I will check that out.

cheers

[Satchmo]

The Cloudy Nights thread refers I think to the Astrotech branded one, but should be same unit as available here as gso or bintel.

[glend]

If weight is a concern the Baader MPCC is lighter than the GSO and importantly the Baader screws directly onto a DSLR with proper backspacing to the standard 55mm sensor setback.