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OT: 54mm spacer tubes
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Hi everyone I need to adjust my image train backfocus which is M54 all the way through, but spacer tubes at this diameter seem to be hard to find and expensive Any leads on these? Brian Brian Valente astro portfolio https://www.brianvalentephotography.com/astrophotography/ portfolio brianvalentephotography.com |
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Ken Sablinsky
Hey Brian, I picked up a set of Blue Fireball rings from Agena: They don't have any spanner notches, so occasionally it's difficult to separate two from each other, but otherwise they work well for my imaging train. -Ken On Mon, Jan 30, 2023 at 8:55 AM Brian Valente <bvalente@...> wrote:
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Kanwar
Brian,
I have complete M54 image train. I used the QHY M54 spacer kit and screwed it to my Filter Wheel. My other end used PreciseParts adapter to connect to my Skywatcher scope. -- Kanwar https://www.astrobin.com/users/brarkevin/ |
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Thanks Kanwar On Mon, Jan 30, 2023 at 9:00 AM Kanwar <brar.kevin@...> wrote: Brian, --
Brian Brian Valente astro portfolio https://www.brianvalentephotography.com/astrophotography/ portfolio brianvalentephotography.com |
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ah that's what i'm looking for. Not sure how i missed them On Mon, Jan 30, 2023 at 8:59 AM Ken Sablinsky <kensablinsky@...> wrote:
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Brian Brian Valente astro portfolio https://www.brianvalentephotography.com/astrophotography/ portfolio brianvalentephotography.com |
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Dale Ghent
I also use the M54 spacer variety pack from Agena, and they have similar packs for other diameters.
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On Jan 30, 2023, at 12:04, Brian Valente <bvalente@...> wrote: |
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Linwood Ferguson
On Mon, Jan 30, 2023 at 12:16 PM, Dale Ghent wrote:
I also use the M54 spacer variety pack from Agena, and they have similar packs for other diameters.Most of my stuff is from Agena, I worked up from M54 to M68, it's actually harder to find M68 stuff I found (easier still M48). One thing I found is if you mix and match vendors the optical length does not always come out right, as they may not thread in as far (or too far). I also had some cases (notably Moonlite vs Fireball) where the threads did not mate nicely and they were very hard to screw on/off. Point being it's often best if you stick to one brand of spacers and adapters where practical. Also always a good idea when you finish a stack of different stuff to actually measure the length and not trust arithmetic. But Agena is my first goto. Linwood |
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Ross Salinger
https://agenaastro.com/adjustment-fine-adjustment-spacer-rings-for-m54-threads-set-of-9.html https://agenaastro.com/blue-fireball-m54-thread-spacer-set-3.html perhaps..................... On 1/30/2023 8:55 AM, Brian Valente
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Thanks Ross - i ended up going with the second link you sent On Mon, Jan 30, 2023 at 9:48 AM Ross Salinger <rgsalinger@...> wrote:
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Brian Brian Valente astro portfolio https://www.brianvalentephotography.com/astrophotography/ portfolio brianvalentephotography.com |
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Hi Brian,
Teleskop-Express have M54 extension tubes of various sizes. I personally use the M54 Baader fine adjustment rings (0.3mm, 0.5mm, 1mm) and like them. They are made of aluminium. Best, Pedro |
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