Maybe. They have a SCT-f to M48-m:
https://agenaastro.com/blue-fireball-sct-female-m48-male-thread-adapter-c-04.html
<https://agenaastro.com/blue-fireball-sct-female-m48-male-thread-adapter-c-04.html>
That looks to use up 1mm of the 81mm back focus.
I have a 16.5mm long M48-f to M42-m adapter. That leaves 26mm of a straight m42
extension left to find. That would get me within 1/2mm which should be close
enough.
Maybe this:
https://agenaastro.com/blue-fireball-t-thread-spacer-ring-25mm-extension.html ;
<https://agenaastro.com/blue-fireball-t-thread-spacer-ring-25mm-extension.html>
Could someone please check my math?
Mike McDonald
mikemac@xxxxxxxxxxx
On Jun 3, 2019, at 4:18 PM, Jim Waters <jimwaters@xxxxxxx> wrote:
Agena AstroProducts doesn't have any Blue Fireball T Spacer Rings that will
add up to the distance you need?
https://agenaastro.com/catalogsearch/result/?q=blue%20fireball
Space is not blackâ¦
Jim
jimwaters@xxxxxxx
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Michael McDonald
Sent: Monday, June 03, 2019 3:40 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Playing last night
True. But thatâs what weâre trying to determine: if I need it! :-)
Something just seems out of whack when the adapter is $150 for connecting a
cheap $100 reducer. For a good SCT Corrector II at $400, the adapter cost
doesnât seem as bad. But at that point, Iâm over half way to the price of
a Hyperstar!
Just sticker shock!
Mike McDonald
mikemac@xxxxxxxxxxx
On Jun 3, 2019, at 3:17 PM, Chris Patrick (Redacted sender "radial195" for
DMARC) <dmarc-noreply@xxxxxxxxxxxxx> wrote:
Nothinâ about this hobby is cheap! You need it, you pay!
Sent from my iPhone
On Jun 3, 2019, at 3:00 PM, Michael McDonald <mikemac@xxxxxxxxxxx> wrote:
Yikes! Precise Parts wants $148 plus shipping for a 2â to t-thread
adapter that 43.5mm long! And then hope that it works! :-(
Mike McDonald
mikemac@xxxxxxxxxxx
On Jun 3, 2019, at 1:04 PM, Chris Patrick (Redacted sender "radial195" for
DMARC) <dmarc-noreply@xxxxxxxxxxxxx> wrote:
Precise Parts specializes in making adapters as needed for most astro
applications! My experience is OPT, Astromart, etc. will order what you
want from PP anyway and then charge a premium to cover their guarantee.
ChrisP
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