[APML] Re: Bisque IFocus eyepiece

[Emmanuele Sordini <vega@bloomingstars.com>]

apml@andreasroerig.de Scrive: 

> 
> Hi Emmanuele, 
> 
> I don't have any experience with the eyepiece from Bisque but I found
> that the Vixen LV 9mm eyepiece is parfocal with the ST4. I use it to
> focus my ST4 for several years now and it works great. 

Did you have to add some setting ring, or did it work just fine right out of 
the box? This could be a better option than an IFocus eyepiece, because the 
Vixen unit could make a fine accessory for visual use too. 

> I never was able to get a better focus than I got with this eyepiece. 

Do you focus visually? I ask you this because I wear glasses, that might be 
a hindrance to using any kind of eyepiece. 

> However you can use
> almost every eyepiece in combination with one or two 1.25" setting
> rings. 

I don't have any setting rings at hand... but I'll try looking from them. 

> That means you once focus the ST4 by using a computer and
> Hartmann mask or whatever, lock the focuser of your guidescope and then
> slide in the eyepiece as far as needed to reach focus. Then you lock
> this position on the eyepiece with the setting ring. It may happen you
> need a setting ring on the ST4 as well to reach the focus with the
> eyepiece.

That's a good idea: have you ever tried it? If that's the case, what 
software do you use to focus the ST-4? Since I don't have any old DOS PC, I 
guess I'll have to try searching for some a program running under Windows 
(ME/2000/XP). 

Thanks anyway,
Emmanuele 
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