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Old 03-10-2007, 09:32 AM
ozstockman (Mike)
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300D Modified and IR filter

Hi guys,

I've just bought 300D with a stock filter replaced with a clear optical glass from Edmun Glass. It' been shipped today and I hope to get it very soon.

Considering it has a clear glass I guess I need some filter which will block infrared and will still pass Hydrogen-Alpha at the same time. Am I right?

Can anyone recommend such a filter? I already own Astronomik IR Blocking filter , will it suit?

cheers,
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Old 03-10-2007, 09:56 AM
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h0ughy (David)
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go 2" filters, I use a baader IR/UV filter
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Old 04-10-2007, 01:48 PM
ozstockman (Mike)
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Quote:
Originally Posted by h0ughy View Post
go 2" filters, I use a baader IR/UV filter
Hi h0ughy,

thanks for your reply.

I'm afraid in this case I'll also need to buy some adapter that I can use to put 2" filter on. Currently I have nothing that can accept 2" filters. Do stock rings supplied with a Skywatcher ED80 have some thread suitable for 2"?

And will it be a huge difference if I use 1.25" filters?

cheers,

Michael
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Old 21-10-2007, 08:12 AM
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Loupy31 (Peter)
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Hi Guys,

Sorry t jump in here, but If I was to remove the original filter in my 300D, do I need to replace it with clear glass, it is going to used for Astro work only.

Peter
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Old 22-10-2007, 02:29 PM
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EzyStyles (Eric)
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hey peter, if it is purely for astro work, you don't need to replace it with anything. however, if you are planning to use a refractor with it, i recommend getting yourself a UV/IR screw on filter to minimise bloated stars.
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Old 23-10-2007, 06:59 PM
ozstockman (Mike)
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Hi Peter,

I guess you don't. There should be no difference in pictures as it's only clear glass. However it may be important in terms of protecting a camera imaging chip from dust.
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