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Re: Backspace

 

Hi Russ

here's a pic of my setup. The filterwheel is screwed directly to the 2600mc behind it (not shown)

Perhaps the main difference is i have an optec TCF focuser replacing the built-in focuser, but I can see i still have the spacer in there



On Sat, Jul 16, 2022 at 10:03 PM Brian Valente via <bvalente=[email protected]> wrote:
Russ this can be super frustrating, i know from experience

I'll have to look at my setup when I get home

Just a thought looking at your reducer, is there an extension tube on that you can remove? it looks modular


Brian


On Sat, Jul 16, 2022 at 8:42 AM Russ via <njrusty=[email protected]> wrote:
On Sat, Jul 16, 2022 at 06:47 AM, Brian Valente wrote:
I have just the flattener. I can¡¯t recall specifics from memory but immodesty sure nothing was in front of it
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I can take a pic when I¡¯m back at the scope Monday.?
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I think the details of backfocus etc are covered in the manual as well
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On Sat, Jul 16, 2022 at 8:24 PM Russ via <njrusty=[email protected]> wrote:
Thank Brian.? I will do that this morning.? One question I am curious about, with the SW 0.77 FR, did you add spacers between it and your scope, then more behind the scope??

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Brian?
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Brian Valente
astro portfolio?
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astrobin?
I've tried to see if I could put a spacer in front of the FR toward the scope but I do not have the correct size.? As I stated earlier, when putting 56mm after the FR, I am unable to itain focus because the focus travel is maxed out (see attached, but this is showing my backfocus set at 51mm so there is still room for focus tube movement but now I have coma in all 4 corners).
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--
Brian?



Brian Valente
astro portfolio?
portfolio
astrobin?



--
Brian?



Brian Valente
astro portfolio?
portfolio
astrobin?
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