[Garyh]

Originally Posted by ballaratdragons

Gary, for Autoguiding, and planet/lunar you won't need the IR filter. It may help but I've never noticed any difference with or without on the Moon.

Essential if you are imaging with it and there are stars in the FOV though. The IR filter stops blown-out stars.

But for guiding, no you won't need it.

There is a thread in here somewhere about placing the tiny IR filter from the lens into an adaptor.

I'll try find it.

Thanks Ken.., I wasn`t worried about star bloat for the autoguiding, might work better actually?. Just thinking I would end up with washed out images of the moon/planets without the filter.
cheers

Originally Posted by Rocket Boy

Gary for Autoguiding I'd don't think you'll need it but you must use something so that you don't get dust collecting on the chip.
You may be better off using a filter anyway.

Using a UV/IR will assist if you do get into planetary/lunar imaging.

you might be right there!! I have already noticed a big dust dougnut already right in the middle and I have only had the lens of twice for a few minutes..