WO Flattener 6 spacing distance - Help.. So who's right then?

[Sp@ce_d]

Hmm this is confusing... which is it then?

WO state "Lens-to-chip suggested distance: 70.5±1mm for F/6 APO" here - https://www.williamo...tener6_spec.php

FLO state "Lens-to-chip suggested distance: 55-57mm" here - http://www.firstligh...lattener-6.html

Just started to work out what adapters I need to get the latest addition to the setup (314L+ No.2 ) hooked up to the ZS71. I'm inclined to believe FLO's measurements..

[jezhughes]

I've had it on 55mm and it's been fine. If i get time tonight i'll try and extend a bit to see a comparison

[Sp@ce_d]

I've had it on 55mm and it's been fine. If i get time tonight i'll try and extend a bit to see a comparison

Yes thats the normal range I was expecting to use...

I don't expect it will be as critical with the chip size of the 314L+ anyway, I'm using it primarily as a reducer. Might be forgiving with your 428 too but would probably show more with the QHY8L. Which one are you using with it?

[grimble61]

hi i have 314l set at 55mm on my wo 71 with ff/r lovely lovely.

[Sp@ce_d]

hi i have 314l set at 55mm on my wo 71 with ff/r lovely lovely.

Thanks.. I got mine close to that & tried it last night.. looks reasonable

10 min Ha sub...

[martin_h]

The "WO" distance quoted if for the "lens surface" to chip distance, where as the 55mm is the shoulder to chip distance

[ollypenrice]

Filters and their location also have an effect so some experimentation will always be needed.

Olly

[Sp@ce_d]

The "WO" distance quoted if for the "lens surface" to chip distance, where as the 55mm is the shoulder to chip distance

Ah I did wonder about that. Thanks Martin. I've high hopes for this scope. Once I get a chance to see how well it does in RGB.

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[Sp@ce_d]

Filters and their location also have an effect so some experimentation will always be needed.

Olly

At the moment I've just got a spacer to make the 55mm. There's a 2" Ha filter on the nose of the reducer so shouldn't count?

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