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Old 04-10-2021, 02:52 PM
KMachell
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ATM suppliers in Melbourne

Hi Folks,
I am planning on building a 150mm F/7 apochromat.
Does anybody know a reliable supplier of optical glass blanks in Melbourne, or anywhere in Oz for that matter?
I have only found suppliers in USA and China who seem reluctant or too busy to reply to us down under.
Mirror blanks seem to be readily available, but BAK and Flint not so.

Thanks.

Ken
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Old 04-10-2021, 07:04 PM
Stefan Buda
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Hi Ken,

No chance for any such supplies in Australia.

Years ago both Schott and Ohara had outlets in Sydney, but these days we are such an engineering backwater that they can't maintain a profitable presence.

Your best bet is to contact Ohara in Germany or try to negotiate with suppliers on Alibaba.

Stefan
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Old 05-10-2021, 09:59 AM
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mura_gadi (Steve)
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Hello,

Schotts in Sydney is operating - 02 8426 1600 for the office and they can pass you onto someone.


Steve
Ps. They may have no stock and just courier out from UK/US adhoc with mark up.
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Old 05-10-2021, 11:54 AM
Saturnine (Jeff)
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Hi Ken

I have to ask, are you sure that you can make an apo lens system using BAK and Flint glass and also are you contemplating a doublet or triplet lens.
Although making your own lens is a noble endeavour , it is a lot of work, as you probably would have realised already but I wonder at the cost and time effectiveness of making your own these days, though the sense of satisfaction and accomplishment on completion would be an enjoyable experience.
As an alternative, this may be an option and of similar specs, give or take a centimetre.

https://www.istar-optical.com/apochromatic.html
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Old 05-10-2021, 01:55 PM
Stefan Buda
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https://www.ohara-gmbh.com/en/ohara.html

You need to register to have access to prices and material lists.

At the moment 1kg of S-FPL55 in slab form costs 416 Euro plus very expensive shipping.
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Old 06-10-2021, 03:35 PM
KMachell
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Thanks for the responses guys.

I am waiting on an 8 mirror blank at the moment, and planning for the next project. Retirement is fast approaching.
It may not be the smartest endeavour, but I think if we stop making things by hand and rely on mass producers, the art dies.
I registered with Ohara, and also found Helm Australia in NSW.
I will give them a call over the next week and see what they recommend and if they have anything available.
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