Sun 23 March with PST90mm mod - first ligh.

AstroFlyer (Arek) · #1 02-04-2011, 11:27 PM

Here are some first images from my PST 90mm mod.
Just testing my set up...

h0ughy (David) · #2 03-04-2011, 12:22 AM

wow looks very promising Arek? The mods made a big difference

AstroFlyer (Arek) · #3 03-04-2011, 10:38 AM

Quote:

Originally Posted by h0ughy

wow looks very promising Arek? The mods made a big difference

Yes they did, especially that my PST's front objective was totally stuffed by "PST rust".
Much better resolution & contrast.
It's a stage 1 mod (thanks Ken

) - Skywatcher 90mm F10 with 90mm Baader ERF-D & PST etalon/black box.
Next stage is making few adapters to accommodate Coronado BF10 or BF15 instead of PST box.
Will post some pictures of the mod in DIY section soon.

Merlin66 (Ken) · #4 03-04-2011, 12:43 PM

Well done - good start.
You should be able to pump up the magnification a bit more x2.5 - you may need the Vegemite lid micro focuser upgrade to improve your focus.
Onwards and upwards!

AstroFlyer (Arek) · #5 03-04-2011, 11:57 PM

Focus seems to be the problem Ken.
I opened PST's box & it seems the prism is out of alignment.
I guess will have to go to stage 2...

In a meantime I am playing with AviStack.
Seems to be doing better job with fine details then Registax.

Merlin66 (Ken) · #6 04-04-2011, 12:07 AM

If the prism is bad, it may be worthwhile ripping it off and re-gluing in a better alignment...you can't make it any worse....
Have you tried Registax V6 yet???

Matt Wastell (Matt) · #7 04-04-2011, 12:58 PM

Great stuff Arek!
Looking forward to more!

AstroFlyer (Arek) · #8 04-04-2011, 08:02 PM

Thanks Matt.

Quote:

Originally Posted by Merlin66

If the prism is bad, it may be worthwhile ripping it off and re-gluing in a better alignment...you can't make it any worse....
Have you tried Registax V6 yet???

Thought about fixing the prism, but probably won't bother.
I have BF10 here, all i need is to make the connectors.
Having some problems finding the aluminium here- local suppliers want to sell me 3.6m lenghts

Tried Registax V6 very briefly, not sure if I like it.
Guess need more time with it, but so far Avistack seems to be giving me better results.

Merlin66 (Ken) · #9 04-04-2011, 11:48 PM

If you use an SCT - 2" adaptor behind the etalon, a couple of 2" extension pieces and then a Baader helical focuser from T thread to 1.25" that would get you down to the BF diagonal...I think the distance from the back of the etalon to the BF10 is 120mm - I can double chcek if you need a precise dimension.