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Player One Ares-M Pro and Samyang 135mm f/2.0 Player One Ares-M Pro · Daniele Borsari · ... · 3 · 250 · 2

daniele.borsari 5.25
Daniele Borsari
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Hi,

I currently have a ZWO ASI533MC Pro and I'm thinking about going mono.

I would like to stay on the IMX533 sensor, so the Player One Ares-M Pro seems like a great option. I would also replace the Canon EOS bayonet with the M48 adapter from Astro Essentials (instead of goin with the ZWO EOS-EFW adapter) to reduce tilt and get extra backfocus space to work with.

This is the optical path I think should work (the remaining 0.3mm + 1/3 of the filters' thickness can be easily added with shims):
Ares-M.jpg
What do you think about it? Is there anyone who has a similar setup that can share his experience?

Daniele
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orion13 6.16
Nicolas Puig
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Hi,
I don't have a samyang but the one ares M pro player yes, it's an excellent choice.
Your diagram seems ok to me to be able to install it on the samyang.

Cs
Nicolas
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daniele.borsari 5.25
Daniele Borsari
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@Nicolas PUIG Thank you
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daniele.borsari 5.25
Daniele Borsari
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Hi, I have a little update.

I actually bought different adapters and extensions since after further inspection the Player One Phoenix Wheel turned out to be 21mm thick instead of 20mm.

Now my imaging train is (from the lens to the camera):
  1. Samyang 135mm with M48 adapter from Astro Essentials (backfocus required 44mm)
  2. M48 female to T2 male adapter and M48 spacer 0,5mm from PrimaLuceLab (5mm + 0,5mm of backfocus added)
  3. Player One Phoenix 8x1,25″ Wheel and Astronomik filters (21mm of backfocus added with 1mm thick filters)
  4. Player One Ares-M Pro and rear 4 point tilter (9,5mm + 8mm of backfocus added)

The achieved backfocus is 44mm (in theory I should've used a 0.3mm shim to account for the filters' glass, but I ended up not using it since it made stars worse).

After a bit of trial and error with the tilt correction this is the best result I could get (keep in mind I stopped down the lens and shot at f/2.8, the filter used here is the Astronomik L-3):
StarTest.jpg
It's not perfect but I'm satisfied enough (especially for the fast f/ratio) and with narrowband it's even a bit sharper.

Daniele
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