David/Geoff
You can't buy them in Australia. A number of US dealers have already been mentioned. Also if you go to the Burgess Website there is further information on the eyepieces there, also some links to worthwhile comments from Thomas Back re their design. If you go to their buying page it tells "non US" residents how to order them via email direct from Burgess. Be wary of the discounted 6mm for $US49, it is an early design that has now been improved upon slightly and the new version will be on sale very soon at the normal price of $US99.
http://www.burgessoptical.com/EPs.html
http://www.burgessoptical.com/EPs/Planetary.html
http://www.burgessoptical.com/OrderE-Mail.html
I have had recent discussions with Tom Trussock and John O'Hara about these eyepieces, here are some extracts:-
CS-John B
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>Tom Trussock wrote:
>Hi John,
>I worked with the prototype 4mm, as well as a final 4mm and 9mm (both
>with and without improved retaining rings).
>My experience is here:
>
http://www.cloudynights.com/documents/Burgesstmb.pdf
>It includes a discussion of the glare issue - interestingly it was
>non-existent in the prototype (and possible homemade solutions), a
>record of my e-mails with TMB about the glare issue, and an update that
>includes how they perform with the replacement retaining ring.
>Frankly, I think you'd be hard pressed to find a better all around
>eyepiece at that price. True the naglers have em in AFOV, the radians
>in eye relief - but for $100?
>Good deal.
>Tom T.
>>John O'Hara wrote:
>> One thing I'd like to see in the book are the new Burgess Planetary
>>eyepieces. I had a chance to do a detailed review under the stars,
>> and the 9 mm version compared very favorably, except for field of
>> view, with my 9 mm Nagler T-6. The AFoV of the 9 mm Burgess was
>> advertised as 60 deg., and mine came in at 61.6 deg., determined by
>> timing a star at the celestial equator. I'd be interested to know if
>> anyone on the "review team" has had an opportunity to uses any of
>>these eyepieces?
>
>> John O'Hara