Secondary Holder

[Shelster1973]

Hey all

Am thinking of replacing my secondary holder and was wondering what peoples thoughts about this are?

Realise that there will be different drifraction spikes from the double vanes, but what will that look like?

 

 

[andrew s]

If they are exactly parallel then just like single veins.

Regards Andrew

[Shelster1973]

Cool...was just reading up on Teleskop Express as they do a similar product and they mentioned that you end up with a single, narower spike that when using a single vain and they can also be used as a focusing aid as if you can see double lines then you ar enot at critical focus.

May order one next month and see what it is like......

[andrew s]

It may be thinner but it will be proportionally brighter as it is the total light blocked that counts.

Regards Andrew

[Shelster1973]

COuld not wait....buckled and ordered one.

Will have to wait now as delivery is estimated as some time in May....