do i need a uv/ir filter with an erf ?

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iwols
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do i need a uv/ir filter with an erf ?

Post by iwols »

Hi do i still need a uv/ir filter if i use a erf filter on the front of my quad 100mm stepped down to 75mm thanks


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nicosolcy
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Re: do i need a uv/ir filter with an erf ?

Post by nicosolcy »

The ERF does not cut off IR completely, but the heat load on the quark will be negligible with the front ERF filter, so the Quark can deal easily with the residual impact of IR:

https://www.baader-planetarium.com/en/d ... ilters.pdf

So, it appears additional measures other than the ERF are not necessary and you can skip that UV / IR filter


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Re: do i need a uv/ir filter with an erf ?

Post by marktownley »

You can do without it like Nick says.


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